Subversion Repositories cheapmusic

Rev

Details | Last modification | View Log | RSS feed

Rev Author Line No. Line
103 - 1
/*  Prototype JavaScript framework, version 1.6.0.1
2
 *  (c) 2005-2007 Sam Stephenson
3
 *
4
 *  Prototype is freely distributable under the terms of an MIT-style license.
5
 *  For details, see the Prototype web site: http://www.prototypejs.org/
6
 *
7
 *--------------------------------------------------------------------------*/
8
 
9
var Prototype = {
10
  Version: '1.6.0.1',
11
 
12
  Browser: {
13
    IE:     !!(window.attachEvent && !window.opera),
14
    Opera:  !!window.opera,
15
    WebKit: navigator.userAgent.indexOf('AppleWebKit/') > -1,
16
    Gecko:  navigator.userAgent.indexOf('Gecko') > -1 && navigator.userAgent.indexOf('KHTML') == -1,
17
    MobileSafari: !!navigator.userAgent.match(/Apple.*Mobile.*Safari/)
18
  },
19
 
20
  BrowserFeatures: {
21
    XPath: !!document.evaluate,
22
    ElementExtensions: !!window.HTMLElement,
23
    SpecificElementExtensions:
24
      document.createElement('div').__proto__ &&
25
      document.createElement('div').__proto__ !==
26
        document.createElement('form').__proto__
27
  },
28
 
29
  ScriptFragment: '<script[^>]*>([\\S\\s]*?)<\/script>',
30
  JSONFilter: /^\/\*-secure-([\s\S]*)\*\/\s*$/,
31
 
32
  emptyFunction: function() { },
33
  K: function(x) { return x }
34
};
35
 
36
if (Prototype.Browser.MobileSafari)
37
  Prototype.BrowserFeatures.SpecificElementExtensions = false;
38
 
39
 
40
/* Based on Alex Arnell's inheritance implementation. */
41
var Class = {
42
  create: function() {
43
    var parent = null, properties = $A(arguments);
44
    if (Object.isFunction(properties[0]))
45
      parent = properties.shift();
46
 
47
    function klass() {
48
      this.initialize.apply(this, arguments);
49
    }
50
 
51
    Object.extend(klass, Class.Methods);
52
    klass.superclass = parent;
53
    klass.subclasses = [];
54
 
55
    if (parent) {
56
      var subclass = function() { };
57
      subclass.prototype = parent.prototype;
58
      klass.prototype = new subclass;
59
      parent.subclasses.push(klass);
60
    }
61
 
62
    for (var i = 0; i < properties.length; i++)
63
      klass.addMethods(properties[i]);
64
 
65
    if (!klass.prototype.initialize)
66
      klass.prototype.initialize = Prototype.emptyFunction;
67
 
68
    klass.prototype.constructor = klass;
69
 
70
    return klass;
71
  }
72
};
73
 
74
Class.Methods = {
75
  addMethods: function(source) {
76
    var ancestor   = this.superclass && this.superclass.prototype;
77
    var properties = Object.keys(source);
78
 
79
    if (!Object.keys({ toString: true }).length)
80
      properties.push("toString", "valueOf");
81
 
82
    for (var i = 0, length = properties.length; i < length; i++) {
83
      var property = properties[i], value = source[property];
84
      if (ancestor && Object.isFunction(value) &&
85
          value.argumentNames().first() == "$super") {
86
        var method = value, value = Object.extend((function(m) {
87
          return function() { return ancestor[m].apply(this, arguments) };
88
        })(property).wrap(method), {
89
          valueOf:  function() { return method },
90
          toString: function() { return method.toString() }
91
        });
92
      }
93
      this.prototype[property] = value;
94
    }
95
 
96
    return this;
97
  }
98
};
99
 
100
var Abstract = { };
101
 
102
Object.extend = function(destination, source) {
103
  for (var property in source)
104
    destination[property] = source[property];
105
  return destination;
106
};
107
 
108
Object.extend(Object, {
109
  inspect: function(object) {
110
    try {
111
      if (Object.isUndefined(object)) return 'undefined';
112
      if (object === null) return 'null';
113
      return object.inspect ? object.inspect() : object.toString();
114
    } catch (e) {
115
      if (e instanceof RangeError) return '...';
116
      throw e;
117
    }
118
  },
119
 
120
  toJSON: function(object) {
121
    var type = typeof object;
122
    switch (type) {
123
      case 'undefined':
124
      case 'function':
125
      case 'unknown': return;
126
      case 'boolean': return object.toString();
127
    }
128
 
129
    if (object === null) return 'null';
130
    if (object.toJSON) return object.toJSON();
131
    if (Object.isElement(object)) return;
132
 
133
    var results = [];
134
    for (var property in object) {
135
      var value = Object.toJSON(object[property]);
136
      if (!Object.isUndefined(value))
137
        results.push(property.toJSON() + ': ' + value);
138
    }
139
 
140
    return '{' + results.join(', ') + '}';
141
  },
142
 
143
  toQueryString: function(object) {
144
    return $H(object).toQueryString();
145
  },
146
 
147
  toHTML: function(object) {
148
    return object && object.toHTML ? object.toHTML() : String.interpret(object);
149
  },
150
 
151
  keys: function(object) {
152
    var keys = [];
153
    for (var property in object)
154
      keys.push(property);
155
    return keys;
156
  },
157
 
158
  values: function(object) {
159
    var values = [];
160
    for (var property in object)
161
      values.push(object[property]);
162
    return values;
163
  },
164
 
165
  clone: function(object) {
166
    return Object.extend({ }, object);
167
  },
168
 
169
  isElement: function(object) {
170
    return object && object.nodeType == 1;
171
  },
172
 
173
  isArray: function(object) {
174
    return object && object.constructor === Array;
175
  },
176
 
177
  isHash: function(object) {
178
    return object instanceof Hash;
179
  },
180
 
181
  isFunction: function(object) {
182
    return typeof object == "function";
183
  },
184
 
185
  isString: function(object) {
186
    return typeof object == "string";
187
  },
188
 
189
  isNumber: function(object) {
190
    return typeof object == "number";
191
  },
192
 
193
  isUndefined: function(object) {
194
    return typeof object == "undefined";
195
  }
196
});
197
 
198
Object.extend(Function.prototype, {
199
  argumentNames: function() {
200
    var names = this.toString().match(/^[\s\(]*function[^(]*\((.*?)\)/)[1].split(",").invoke("strip");
201
    return names.length == 1 && !names[0] ? [] : names;
202
  },
203
 
204
  bind: function() {
205
    if (arguments.length < 2 && Object.isUndefined(arguments[0])) return this;
206
    var __method = this, args = $A(arguments), object = args.shift();
207
    return function() {
208
      return __method.apply(object, args.concat($A(arguments)));
209
    }
210
  },
211
 
212
  bindAsEventListener: function() {
213
    var __method = this, args = $A(arguments), object = args.shift();
214
    return function(event) {
215
      return __method.apply(object, [event || window.event].concat(args));
216
    }
217
  },
218
 
219
  curry: function() {
220
    if (!arguments.length) return this;
221
    var __method = this, args = $A(arguments);
222
    return function() {
223
      return __method.apply(this, args.concat($A(arguments)));
224
    }
225
  },
226
 
227
  delay: function() {
228
    var __method = this, args = $A(arguments), timeout = args.shift() * 1000;
229
    return window.setTimeout(function() {
230
      return __method.apply(__method, args);
231
    }, timeout);
232
  },
233
 
234
  wrap: function(wrapper) {
235
    var __method = this;
236
    return function() {
237
      return wrapper.apply(this, [__method.bind(this)].concat($A(arguments)));
238
    }
239
  },
240
 
241
  methodize: function() {
242
    if (this._methodized) return this._methodized;
243
    var __method = this;
244
    return this._methodized = function() {
245
      return __method.apply(null, [this].concat($A(arguments)));
246
    };
247
  }
248
});
249
 
250
Function.prototype.defer = Function.prototype.delay.curry(0.01);
251
 
252
Date.prototype.toJSON = function() {
253
  return '"' + this.getUTCFullYear() + '-' +
254
    (this.getUTCMonth() + 1).toPaddedString(2) + '-' +
255
    this.getUTCDate().toPaddedString(2) + 'T' +
256
    this.getUTCHours().toPaddedString(2) + ':' +
257
    this.getUTCMinutes().toPaddedString(2) + ':' +
258
    this.getUTCSeconds().toPaddedString(2) + 'Z"';
259
};
260
 
261
var Try = {
262
  these: function() {
263
    var returnValue;
264
 
265
    for (var i = 0, length = arguments.length; i < length; i++) {
266
      var lambda = arguments[i];
267
      try {
268
        returnValue = lambda();
269
        break;
270
      } catch (e) { }
271
    }
272
 
273
    return returnValue;
274
  }
275
};
276
 
277
RegExp.prototype.match = RegExp.prototype.test;
278
 
279
RegExp.escape = function(str) {
280
  return String(str).replace(/([.*+?^=!:${}()|[\]\/\\])/g, '\\$1');
281
};
282
 
283
/*--------------------------------------------------------------------------*/
284
 
285
var PeriodicalExecuter = Class.create({
286
  initialize: function(callback, frequency) {
287
    this.callback = callback;
288
    this.frequency = frequency;
289
    this.currentlyExecuting = false;
290
 
291
    this.registerCallback();
292
  },
293
 
294
  registerCallback: function() {
295
    this.timer = setInterval(this.onTimerEvent.bind(this), this.frequency * 1000);
296
  },
297
 
298
  execute: function() {
299
    this.callback(this);
300
  },
301
 
302
  stop: function() {
303
    if (!this.timer) return;
304
    clearInterval(this.timer);
305
    this.timer = null;
306
  },
307
 
308
  onTimerEvent: function() {
309
    if (!this.currentlyExecuting) {
310
      try {
311
        this.currentlyExecuting = true;
312
        this.execute();
313
      } finally {
314
        this.currentlyExecuting = false;
315
      }
316
    }
317
  }
318
});
319
Object.extend(String, {
320
  interpret: function(value) {
321
    return value == null ? '' : String(value);
322
  },
323
  specialChar: {
324
    '\b': '\\b',
325
    '\t': '\\t',
326
    '\n': '\\n',
327
    '\f': '\\f',
328
    '\r': '\\r',
329
    '\\': '\\\\'
330
  }
331
});
332
 
333
Object.extend(String.prototype, {
334
  gsub: function(pattern, replacement) {
335
    var result = '', source = this, match;
336
    replacement = arguments.callee.prepareReplacement(replacement);
337
 
338
    while (source.length > 0) {
339
      if (match = source.match(pattern)) {
340
        result += source.slice(0, match.index);
341
        result += String.interpret(replacement(match));
342
        source  = source.slice(match.index + match[0].length);
343
      } else {
344
        result += source, source = '';
345
      }
346
    }
347
    return result;
348
  },
349
 
350
  sub: function(pattern, replacement, count) {
351
    replacement = this.gsub.prepareReplacement(replacement);
352
    count = Object.isUndefined(count) ? 1 : count;
353
 
354
    return this.gsub(pattern, function(match) {
355
      if (--count < 0) return match[0];
356
      return replacement(match);
357
    });
358
  },
359
 
360
  scan: function(pattern, iterator) {
361
    this.gsub(pattern, iterator);
362
    return String(this);
363
  },
364
 
365
  truncate: function(length, truncation) {
366
    length = length || 30;
367
    truncation = Object.isUndefined(truncation) ? '...' : truncation;
368
    return this.length > length ?
369
      this.slice(0, length - truncation.length) + truncation : String(this);
370
  },
371
 
372
  strip: function() {
373
    return this.replace(/^\s+/, '').replace(/\s+$/, '');
374
  },
375
 
376
  stripTags: function() {
377
    return this.replace(/<\/?[^>]+>/gi, '');
378
  },
379
 
380
  stripScripts: function() {
381
    return this.replace(new RegExp(Prototype.ScriptFragment, 'img'), '');
382
  },
383
 
384
  extractScripts: function() {
385
    var matchAll = new RegExp(Prototype.ScriptFragment, 'img');
386
    var matchOne = new RegExp(Prototype.ScriptFragment, 'im');
387
    return (this.match(matchAll) || []).map(function(scriptTag) {
388
      return (scriptTag.match(matchOne) || ['', ''])[1];
389
    });
390
  },
391
 
392
  evalScripts: function() {
393
    return this.extractScripts().map(function(script) { return eval(script) });
394
  },
395
 
396
  escapeHTML: function() {
397
    var self = arguments.callee;
398
    self.text.data = this;
399
    return self.div.innerHTML;
400
  },
401
 
402
  unescapeHTML: function() {
403
    var div = new Element('div');
404
    div.innerHTML = this.stripTags();
405
    return div.childNodes[0] ? (div.childNodes.length > 1 ?
406
      $A(div.childNodes).inject('', function(memo, node) { return memo+node.nodeValue }) :
407
      div.childNodes[0].nodeValue) : '';
408
  },
409
 
410
  toQueryParams: function(separator) {
411
    var match = this.strip().match(/([^?#]*)(#.*)?$/);
412
    if (!match) return { };
413
 
414
    return match[1].split(separator || '&').inject({ }, function(hash, pair) {
415
      if ((pair = pair.split('='))[0]) {
416
        var key = decodeURIComponent(pair.shift());
417
        var value = pair.length > 1 ? pair.join('=') : pair[0];
418
        if (value != undefined) value = decodeURIComponent(value);
419
 
420
        if (key in hash) {
421
          if (!Object.isArray(hash[key])) hash[key] = [hash[key]];
422
          hash[key].push(value);
423
        }
424
        else hash[key] = value;
425
      }
426
      return hash;
427
    });
428
  },
429
 
430
  toArray: function() {
431
    return this.split('');
432
  },
433
 
434
  succ: function() {
435
    return this.slice(0, this.length - 1) +
436
      String.fromCharCode(this.charCodeAt(this.length - 1) + 1);
437
  },
438
 
439
  times: function(count) {
440
    return count < 1 ? '' : new Array(count + 1).join(this);
441
  },
442
 
443
  camelize: function() {
444
    var parts = this.split('-'), len = parts.length;
445
    if (len == 1) return parts[0];
446
 
447
    var camelized = this.charAt(0) == '-'
448
      ? parts[0].charAt(0).toUpperCase() + parts[0].substring(1)
449
      : parts[0];
450
 
451
    for (var i = 1; i < len; i++)
452
      camelized += parts[i].charAt(0).toUpperCase() + parts[i].substring(1);
453
 
454
    return camelized;
455
  },
456
 
457
  capitalize: function() {
458
    return this.charAt(0).toUpperCase() + this.substring(1).toLowerCase();
459
  },
460
 
461
  underscore: function() {
462
    return this.gsub(/::/, '/').gsub(/([A-Z]+)([A-Z][a-z])/,'#{1}_#{2}').gsub(/([a-z\d])([A-Z])/,'#{1}_#{2}').gsub(/-/,'_').toLowerCase();
463
  },
464
 
465
  dasherize: function() {
466
    return this.gsub(/_/,'-');
467
  },
468
 
469
  inspect: function(useDoubleQuotes) {
470
    var escapedString = this.gsub(/[\x00-\x1f\\]/, function(match) {
471
      var character = String.specialChar[match[0]];
472
      return character ? character : '\\u00' + match[0].charCodeAt().toPaddedString(2, 16);
473
    });
474
    if (useDoubleQuotes) return '"' + escapedString.replace(/"/g, '\\"') + '"';
475
    return "'" + escapedString.replace(/'/g, '\\\'') + "'";
476
  },
477
 
478
  toJSON: function() {
479
    return this.inspect(true);
480
  },
481
 
482
  unfilterJSON: function(filter) {
483
    return this.sub(filter || Prototype.JSONFilter, '#{1}');
484
  },
485
 
486
  isJSON: function() {
487
    var str = this;
488
    if (str.blank()) return false;
489
    str = this.replace(/\\./g, '@').replace(/"[^"\\\n\r]*"/g, '');
490
    return (/^[,:{}\[\]0-9.\-+Eaeflnr-u \n\r\t]*$/).test(str);
491
  },
492
 
493
  evalJSON: function(sanitize) {
494
    var json = this.unfilterJSON();
495
    try {
496
      if (!sanitize || json.isJSON()) return eval('(' + json + ')');
497
    } catch (e) { }
498
    throw new SyntaxError('Badly formed JSON string: ' + this.inspect());
499
  },
500
 
501
  include: function(pattern) {
502
    return this.indexOf(pattern) > -1;
503
  },
504
 
505
  startsWith: function(pattern) {
506
    return this.indexOf(pattern) === 0;
507
  },
508
 
509
  endsWith: function(pattern) {
510
    var d = this.length - pattern.length;
511
    return d >= 0 && this.lastIndexOf(pattern) === d;
512
  },
513
 
514
  empty: function() {
515
    return this == '';
516
  },
517
 
518
  blank: function() {
519
    return /^\s*$/.test(this);
520
  },
521
 
522
  interpolate: function(object, pattern) {
523
    return new Template(this, pattern).evaluate(object);
524
  }
525
});
526
 
527
if (Prototype.Browser.WebKit || Prototype.Browser.IE) Object.extend(String.prototype, {
528
  escapeHTML: function() {
529
    return this.replace(/&/g,'&amp;').replace(/</g,'&lt;').replace(/>/g,'&gt;');
530
  },
531
  unescapeHTML: function() {
532
    return this.replace(/&amp;/g,'&').replace(/&lt;/g,'<').replace(/&gt;/g,'>');
533
  }
534
});
535
 
536
String.prototype.gsub.prepareReplacement = function(replacement) {
537
  if (Object.isFunction(replacement)) return replacement;
538
  var template = new Template(replacement);
539
  return function(match) { return template.evaluate(match) };
540
};
541
 
542
String.prototype.parseQuery = String.prototype.toQueryParams;
543
 
544
Object.extend(String.prototype.escapeHTML, {
545
  div:  document.createElement('div'),
546
  text: document.createTextNode('')
547
});
548
 
549
with (String.prototype.escapeHTML) div.appendChild(text);
550
 
551
var Template = Class.create({
552
  initialize: function(template, pattern) {
553
    this.template = template.toString();
554
    this.pattern = pattern || Template.Pattern;
555
  },
556
 
557
  evaluate: function(object) {
558
    if (Object.isFunction(object.toTemplateReplacements))
559
      object = object.toTemplateReplacements();
560
 
561
    return this.template.gsub(this.pattern, function(match) {
562
      if (object == null) return '';
563
 
564
      var before = match[1] || '';
565
      if (before == '\\') return match[2];
566
 
567
      var ctx = object, expr = match[3];
568
      var pattern = /^([^.[]+|\[((?:.*?[^\\])?)\])(\.|\[|$)/;
569
      match = pattern.exec(expr);
570
      if (match == null) return before;
571
 
572
      while (match != null) {
573
        var comp = match[1].startsWith('[') ? match[2].gsub('\\\\]', ']') : match[1];
574
        ctx = ctx[comp];
575
        if (null == ctx || '' == match[3]) break;
576
        expr = expr.substring('[' == match[3] ? match[1].length : match[0].length);
577
        match = pattern.exec(expr);
578
      }
579
 
580
      return before + String.interpret(ctx);
581
    }.bind(this));
582
  }
583
});
584
Template.Pattern = /(^|.|\r|\n)(#\{(.*?)\})/;
585
 
586
var $break = { };
587
 
588
var Enumerable = {
589
  each: function(iterator, context) {
590
    var index = 0;
591
    iterator = iterator.bind(context);
592
    try {
593
      this._each(function(value) {
594
        iterator(value, index++);
595
      });
596
    } catch (e) {
597
      if (e != $break) throw e;
598
    }
599
    return this;
600
  },
601
 
602
  eachSlice: function(number, iterator, context) {
603
    iterator = iterator ? iterator.bind(context) : Prototype.K;
604
    var index = -number, slices = [], array = this.toArray();
605
    while ((index += number) < array.length)
606
      slices.push(array.slice(index, index+number));
607
    return slices.collect(iterator, context);
608
  },
609
 
610
  all: function(iterator, context) {
611
    iterator = iterator ? iterator.bind(context) : Prototype.K;
612
    var result = true;
613
    this.each(function(value, index) {
614
      result = result && !!iterator(value, index);
615
      if (!result) throw $break;
616
    });
617
    return result;
618
  },
619
 
620
  any: function(iterator, context) {
621
    iterator = iterator ? iterator.bind(context) : Prototype.K;
622
    var result = false;
623
    this.each(function(value, index) {
624
      if (result = !!iterator(value, index))
625
        throw $break;
626
    });
627
    return result;
628
  },
629
 
630
  collect: function(iterator, context) {
631
    iterator = iterator ? iterator.bind(context) : Prototype.K;
632
    var results = [];
633
    this.each(function(value, index) {
634
      results.push(iterator(value, index));
635
    });
636
    return results;
637
  },
638
 
639
  detect: function(iterator, context) {
640
    iterator = iterator.bind(context);
641
    var result;
642
    this.each(function(value, index) {
643
      if (iterator(value, index)) {
644
        result = value;
645
        throw $break;
646
      }
647
    });
648
    return result;
649
  },
650
 
651
  findAll: function(iterator, context) {
652
    iterator = iterator.bind(context);
653
    var results = [];
654
    this.each(function(value, index) {
655
      if (iterator(value, index))
656
        results.push(value);
657
    });
658
    return results;
659
  },
660
 
661
  grep: function(filter, iterator, context) {
662
    iterator = iterator ? iterator.bind(context) : Prototype.K;
663
    var results = [];
664
 
665
    if (Object.isString(filter))
666
      filter = new RegExp(filter);
667
 
668
    this.each(function(value, index) {
669
      if (filter.match(value))
670
        results.push(iterator(value, index));
671
    });
672
    return results;
673
  },
674
 
675
  include: function(object) {
676
    if (Object.isFunction(this.indexOf))
677
      if (this.indexOf(object) != -1) return true;
678
 
679
    var found = false;
680
    this.each(function(value) {
681
      if (value == object) {
682
        found = true;
683
        throw $break;
684
      }
685
    });
686
    return found;
687
  },
688
 
689
  inGroupsOf: function(number, fillWith) {
690
    fillWith = Object.isUndefined(fillWith) ? null : fillWith;
691
    return this.eachSlice(number, function(slice) {
692
      while(slice.length < number) slice.push(fillWith);
693
      return slice;
694
    });
695
  },
696
 
697
  inject: function(memo, iterator, context) {
698
    iterator = iterator.bind(context);
699
    this.each(function(value, index) {
700
      memo = iterator(memo, value, index);
701
    });
702
    return memo;
703
  },
704
 
705
  invoke: function(method) {
706
    var args = $A(arguments).slice(1);
707
    return this.map(function(value) {
708
      return value[method].apply(value, args);
709
    });
710
  },
711
 
712
  max: function(iterator, context) {
713
    iterator = iterator ? iterator.bind(context) : Prototype.K;
714
    var result;
715
    this.each(function(value, index) {
716
      value = iterator(value, index);
717
      if (result == null || value >= result)
718
        result = value;
719
    });
720
    return result;
721
  },
722
 
723
  min: function(iterator, context) {
724
    iterator = iterator ? iterator.bind(context) : Prototype.K;
725
    var result;
726
    this.each(function(value, index) {
727
      value = iterator(value, index);
728
      if (result == null || value < result)
729
        result = value;
730
    });
731
    return result;
732
  },
733
 
734
  partition: function(iterator, context) {
735
    iterator = iterator ? iterator.bind(context) : Prototype.K;
736
    var trues = [], falses = [];
737
    this.each(function(value, index) {
738
      (iterator(value, index) ?
739
        trues : falses).push(value);
740
    });
741
    return [trues, falses];
742
  },
743
 
744
  pluck: function(property) {
745
    var results = [];
746
    this.each(function(value) {
747
      results.push(value[property]);
748
    });
749
    return results;
750
  },
751
 
752
  reject: function(iterator, context) {
753
    iterator = iterator.bind(context);
754
    var results = [];
755
    this.each(function(value, index) {
756
      if (!iterator(value, index))
757
        results.push(value);
758
    });
759
    return results;
760
  },
761
 
762
  sortBy: function(iterator, context) {
763
    iterator = iterator.bind(context);
764
    return this.map(function(value, index) {
765
      return {value: value, criteria: iterator(value, index)};
766
    }).sort(function(left, right) {
767
      var a = left.criteria, b = right.criteria;
768
      return a < b ? -1 : a > b ? 1 : 0;
769
    }).pluck('value');
770
  },
771
 
772
  toArray: function() {
773
    return this.map();
774
  },
775
 
776
  zip: function() {
777
    var iterator = Prototype.K, args = $A(arguments);
778
    if (Object.isFunction(args.last()))
779
      iterator = args.pop();
780
 
781
    var collections = [this].concat(args).map($A);
782
    return this.map(function(value, index) {
783
      return iterator(collections.pluck(index));
784
    });
785
  },
786
 
787
  size: function() {
788
    return this.toArray().length;
789
  },
790
 
791
  inspect: function() {
792
    return '#<Enumerable:' + this.toArray().inspect() + '>';
793
  }
794
};
795
 
796
Object.extend(Enumerable, {
797
  map:     Enumerable.collect,
798
  find:    Enumerable.detect,
799
  select:  Enumerable.findAll,
800
  filter:  Enumerable.findAll,
801
  member:  Enumerable.include,
802
  entries: Enumerable.toArray,
803
  every:   Enumerable.all,
804
  some:    Enumerable.any
805
});
806
function $A(iterable) {
807
  if (!iterable) return [];
808
  if (iterable.toArray) return iterable.toArray();
809
  var length = iterable.length || 0, results = new Array(length);
810
  while (length--) results[length] = iterable[length];
811
  return results;
812
}
813
 
814
if (Prototype.Browser.WebKit) {
815
  function $A(iterable) {
816
    if (!iterable) return [];
817
    if (!(Object.isFunction(iterable) && iterable == '[object NodeList]') &&
818
        iterable.toArray) return iterable.toArray();
819
    var length = iterable.length || 0, results = new Array(length);
820
    while (length--) results[length] = iterable[length];
821
    return results;
822
  }
823
}
824
 
825
Array.from = $A;
826
 
827
Object.extend(Array.prototype, Enumerable);
828
 
829
if (!Array.prototype._reverse) Array.prototype._reverse = Array.prototype.reverse;
830
 
831
Object.extend(Array.prototype, {
832
  _each: function(iterator) {
833
    for (var i = 0, length = this.length; i < length; i++)
834
      iterator(this[i]);
835
  },
836
 
837
  clear: function() {
838
    this.length = 0;
839
    return this;
840
  },
841
 
842
  first: function() {
843
    return this[0];
844
  },
845
 
846
  last: function() {
847
    return this[this.length - 1];
848
  },
849
 
850
  compact: function() {
851
    return this.select(function(value) {
852
      return value != null;
853
    });
854
  },
855
 
856
  flatten: function() {
857
    return this.inject([], function(array, value) {
858
      return array.concat(Object.isArray(value) ?
859
        value.flatten() : [value]);
860
    });
861
  },
862
 
863
  without: function() {
864
    var values = $A(arguments);
865
    return this.select(function(value) {
866
      return !values.include(value);
867
    });
868
  },
869
 
870
  reverse: function(inline) {
871
    return (inline !== false ? this : this.toArray())._reverse();
872
  },
873
 
874
  reduce: function() {
875
    return this.length > 1 ? this : this[0];
876
  },
877
 
878
  uniq: function(sorted) {
879
    return this.inject([], function(array, value, index) {
880
      if (0 == index || (sorted ? array.last() != value : !array.include(value)))
881
        array.push(value);
882
      return array;
883
    });
884
  },
885
 
886
  intersect: function(array) {
887
    return this.uniq().findAll(function(item) {
888
      return array.detect(function(value) { return item === value });
889
    });
890
  },
891
 
892
  clone: function() {
893
    return [].concat(this);
894
  },
895
 
896
  size: function() {
897
    return this.length;
898
  },
899
 
900
  inspect: function() {
901
    return '[' + this.map(Object.inspect).join(', ') + ']';
902
  },
903
 
904
  toJSON: function() {
905
    var results = [];
906
    this.each(function(object) {
907
      var value = Object.toJSON(object);
908
      if (!Object.isUndefined(value)) results.push(value);
909
    });
910
    return '[' + results.join(', ') + ']';
911
  }
912
});
913
 
914
// use native browser JS 1.6 implementation if available
915
if (Object.isFunction(Array.prototype.forEach))
916
  Array.prototype._each = Array.prototype.forEach;
917
 
918
if (!Array.prototype.indexOf) Array.prototype.indexOf = function(item, i) {
919
  i || (i = 0);
920
  var length = this.length;
921
  if (i < 0) i = length + i;
922
  for (; i < length; i++)
923
    if (this[i] === item) return i;
924
  return -1;
925
};
926
 
927
if (!Array.prototype.lastIndexOf) Array.prototype.lastIndexOf = function(item, i) {
928
  i = isNaN(i) ? this.length : (i < 0 ? this.length + i : i) + 1;
929
  var n = this.slice(0, i).reverse().indexOf(item);
930
  return (n < 0) ? n : i - n - 1;
931
};
932
 
933
Array.prototype.toArray = Array.prototype.clone;
934
 
935
function $w(string) {
936
  if (!Object.isString(string)) return [];
937
  string = string.strip();
938
  return string ? string.split(/\s+/) : [];
939
}
940
 
941
if (Prototype.Browser.Opera){
942
  Array.prototype.concat = function() {
943
    var array = [];
944
    for (var i = 0, length = this.length; i < length; i++) array.push(this[i]);
945
    for (var i = 0, length = arguments.length; i < length; i++) {
946
      if (Object.isArray(arguments[i])) {
947
        for (var j = 0, arrayLength = arguments[i].length; j < arrayLength; j++)
948
          array.push(arguments[i][j]);
949
      } else {
950
        array.push(arguments[i]);
951
      }
952
    }
953
    return array;
954
  };
955
}
956
Object.extend(Number.prototype, {
957
  toColorPart: function() {
958
    return this.toPaddedString(2, 16);
959
  },
960
 
961
  succ: function() {
962
    return this + 1;
963
  },
964
 
965
  times: function(iterator) {
966
    $R(0, this, true).each(iterator);
967
    return this;
968
  },
969
 
970
  toPaddedString: function(length, radix) {
971
    var string = this.toString(radix || 10);
972
    return '0'.times(length - string.length) + string;
973
  },
974
 
975
  toJSON: function() {
976
    return isFinite(this) ? this.toString() : 'null';
977
  }
978
});
979
 
980
$w('abs round ceil floor').each(function(method){
981
  Number.prototype[method] = Math[method].methodize();
982
});
983
function $H(object) {
984
  return new Hash(object);
985
};
986
 
987
var Hash = Class.create(Enumerable, (function() {
988
 
989
  function toQueryPair(key, value) {
990
    if (Object.isUndefined(value)) return key;
991
    return key + '=' + encodeURIComponent(String.interpret(value));
992
  }
993
 
994
  return {
995
    initialize: function(object) {
996
      this._object = Object.isHash(object) ? object.toObject() : Object.clone(object);
997
    },
998
 
999
    _each: function(iterator) {
1000
      for (var key in this._object) {
1001
        var value = this._object[key], pair = [key, value];
1002
        pair.key = key;
1003
        pair.value = value;
1004
        iterator(pair);
1005
      }
1006
    },
1007
 
1008
    set: function(key, value) {
1009
      return this._object[key] = value;
1010
    },
1011
 
1012
    get: function(key) {
1013
      return this._object[key];
1014
    },
1015
 
1016
    unset: function(key) {
1017
      var value = this._object[key];
1018
      delete this._object[key];
1019
      return value;
1020
    },
1021
 
1022
    toObject: function() {
1023
      return Object.clone(this._object);
1024
    },
1025
 
1026
    keys: function() {
1027
      return this.pluck('key');
1028
    },
1029
 
1030
    values: function() {
1031
      return this.pluck('value');
1032
    },
1033
 
1034
    index: function(value) {
1035
      var match = this.detect(function(pair) {
1036
        return pair.value === value;
1037
      });
1038
      return match && match.key;
1039
    },
1040
 
1041
    merge: function(object) {
1042
      return this.clone().update(object);
1043
    },
1044
 
1045
    update: function(object) {
1046
      return new Hash(object).inject(this, function(result, pair) {
1047
        result.set(pair.key, pair.value);
1048
        return result;
1049
      });
1050
    },
1051
 
1052
    toQueryString: function() {
1053
      return this.map(function(pair) {
1054
        var key = encodeURIComponent(pair.key), values = pair.value;
1055
 
1056
        if (values && typeof values == 'object') {
1057
          if (Object.isArray(values))
1058
            return values.map(toQueryPair.curry(key)).join('&');
1059
        }
1060
        return toQueryPair(key, values);
1061
      }).join('&');
1062
    },
1063
 
1064
    inspect: function() {
1065
      return '#<Hash:{' + this.map(function(pair) {
1066
        return pair.map(Object.inspect).join(': ');
1067
      }).join(', ') + '}>';
1068
    },
1069
 
1070
    toJSON: function() {
1071
      return Object.toJSON(this.toObject());
1072
    },
1073
 
1074
    clone: function() {
1075
      return new Hash(this);
1076
    }
1077
  }
1078
})());
1079
 
1080
Hash.prototype.toTemplateReplacements = Hash.prototype.toObject;
1081
Hash.from = $H;
1082
var ObjectRange = Class.create(Enumerable, {
1083
  initialize: function(start, end, exclusive) {
1084
    this.start = start;
1085
    this.end = end;
1086
    this.exclusive = exclusive;
1087
  },
1088
 
1089
  _each: function(iterator) {
1090
    var value = this.start;
1091
    while (this.include(value)) {
1092
      iterator(value);
1093
      value = value.succ();
1094
    }
1095
  },
1096
 
1097
  include: function(value) {
1098
    if (value < this.start)
1099
      return false;
1100
    if (this.exclusive)
1101
      return value < this.end;
1102
    return value <= this.end;
1103
  }
1104
});
1105
 
1106
var $R = function(start, end, exclusive) {
1107
  return new ObjectRange(start, end, exclusive);
1108
};
1109
 
1110
var Ajax = {
1111
  getTransport: function() {
1112
    return Try.these(
1113
      function() {return new XMLHttpRequest()},
1114
      function() {return new ActiveXObject('Msxml2.XMLHTTP')},
1115
      function() {return new ActiveXObject('Microsoft.XMLHTTP')}
1116
    ) || false;
1117
  },
1118
 
1119
  activeRequestCount: 0
1120
};
1121
 
1122
Ajax.Responders = {
1123
  responders: [],
1124
 
1125
  _each: function(iterator) {
1126
    this.responders._each(iterator);
1127
  },
1128
 
1129
  register: function(responder) {
1130
    if (!this.include(responder))
1131
      this.responders.push(responder);
1132
  },
1133
 
1134
  unregister: function(responder) {
1135
    this.responders = this.responders.without(responder);
1136
  },
1137
 
1138
  dispatch: function(callback, request, transport, json) {
1139
    this.each(function(responder) {
1140
      if (Object.isFunction(responder[callback])) {
1141
        try {
1142
          responder[callback].apply(responder, [request, transport, json]);
1143
        } catch (e) { }
1144
      }
1145
    });
1146
  }
1147
};
1148
 
1149
Object.extend(Ajax.Responders, Enumerable);
1150
 
1151
Ajax.Responders.register({
1152
  onCreate:   function() { Ajax.activeRequestCount++ },
1153
  onComplete: function() { Ajax.activeRequestCount-- }
1154
});
1155
 
1156
Ajax.Base = Class.create({
1157
  initialize: function(options) {
1158
    this.options = {
1159
      method:       'post',
1160
      asynchronous: true,
1161
      contentType:  'application/x-www-form-urlencoded',
1162
      encoding:     'UTF-8',
1163
      parameters:   '',
1164
      evalJSON:     true,
1165
      evalJS:       true
1166
    };
1167
    Object.extend(this.options, options || { });
1168
 
1169
    this.options.method = this.options.method.toLowerCase();
1170
 
1171
    if (Object.isString(this.options.parameters))
1172
      this.options.parameters = this.options.parameters.toQueryParams();
1173
    else if (Object.isHash(this.options.parameters))
1174
      this.options.parameters = this.options.parameters.toObject();
1175
  }
1176
});
1177
 
1178
Ajax.Request = Class.create(Ajax.Base, {
1179
  _complete: false,
1180
 
1181
  initialize: function($super, url, options) {
1182
    $super(options);
1183
    this.transport = Ajax.getTransport();
1184
    this.request(url);
1185
  },
1186
 
1187
  request: function(url) {
1188
    this.url = url;
1189
    this.method = this.options.method;
1190
    var params = Object.clone(this.options.parameters);
1191
 
1192
    if (!['get', 'post'].include(this.method)) {
1193
      // simulate other verbs over post
1194
      params['_method'] = this.method;
1195
      this.method = 'post';
1196
    }
1197
 
1198
    this.parameters = params;
1199
 
1200
    if (params = Object.toQueryString(params)) {
1201
      // when GET, append parameters to URL
1202
      if (this.method == 'get')
1203
        this.url += (this.url.include('?') ? '&' : '?') + params;
1204
      else if (/Konqueror|Safari|KHTML/.test(navigator.userAgent))
1205
        params += '&_=';
1206
    }
1207
 
1208
    try {
1209
      var response = new Ajax.Response(this);
1210
      if (this.options.onCreate) this.options.onCreate(response);
1211
      Ajax.Responders.dispatch('onCreate', this, response);
1212
 
1213
      this.transport.open(this.method.toUpperCase(), this.url,
1214
        this.options.asynchronous);
1215
 
1216
      if (this.options.asynchronous) this.respondToReadyState.bind(this).defer(1);
1217
 
1218
      this.transport.onreadystatechange = this.onStateChange.bind(this);
1219
      this.setRequestHeaders();
1220
 
1221
      this.body = this.method == 'post' ? (this.options.postBody || params) : null;
1222
      this.transport.send(this.body);
1223
 
1224
      /* Force Firefox to handle ready state 4 for synchronous requests */
1225
      if (!this.options.asynchronous && this.transport.overrideMimeType)
1226
        this.onStateChange();
1227
 
1228
    }
1229
    catch (e) {
1230
      this.dispatchException(e);
1231
    }
1232
  },
1233
 
1234
  onStateChange: function() {
1235
    var readyState = this.transport.readyState;
1236
    if (readyState > 1 && !((readyState == 4) && this._complete))
1237
      this.respondToReadyState(this.transport.readyState);
1238
  },
1239
 
1240
  setRequestHeaders: function() {
1241
    var headers = {
1242
      'X-Requested-With': 'XMLHttpRequest',
1243
      'X-Prototype-Version': Prototype.Version,
1244
      'Accept': 'text/javascript, text/html, application/xml, text/xml, */*'
1245
    };
1246
 
1247
    if (this.method == 'post') {
1248
      headers['Content-type'] = this.options.contentType +
1249
        (this.options.encoding ? '; charset=' + this.options.encoding : '');
1250
 
1251
      /* Force "Connection: close" for older Mozilla browsers to work
1252
       * around a bug where XMLHttpRequest sends an incorrect
1253
       * Content-length header. See Mozilla Bugzilla #246651.
1254
       */
1255
      if (this.transport.overrideMimeType &&
1256
          (navigator.userAgent.match(/Gecko\/(\d{4})/) || [0,2005])[1] < 2005)
1257
            headers['Connection'] = 'close';
1258
    }
1259
 
1260
    // user-defined headers
1261
    if (typeof this.options.requestHeaders == 'object') {
1262
      var extras = this.options.requestHeaders;
1263
 
1264
      if (Object.isFunction(extras.push))
1265
        for (var i = 0, length = extras.length; i < length; i += 2)
1266
          headers[extras[i]] = extras[i+1];
1267
      else
1268
        $H(extras).each(function(pair) { headers[pair.key] = pair.value });
1269
    }
1270
 
1271
    for (var name in headers)
1272
      this.transport.setRequestHeader(name, headers[name]);
1273
  },
1274
 
1275
  success: function() {
1276
    var status = this.getStatus();
1277
    return !status || (status >= 200 && status < 300);
1278
  },
1279
 
1280
  getStatus: function() {
1281
    try {
1282
      return this.transport.status || 0;
1283
    } catch (e) { return 0 }
1284
  },
1285
 
1286
  respondToReadyState: function(readyState) {
1287
    var state = Ajax.Request.Events[readyState], response = new Ajax.Response(this);
1288
 
1289
    if (state == 'Complete') {
1290
      try {
1291
        this._complete = true;
1292
        (this.options['on' + response.status]
1293
         || this.options['on' + (this.success() ? 'Success' : 'Failure')]
1294
         || Prototype.emptyFunction)(response, response.headerJSON);
1295
      } catch (e) {
1296
        this.dispatchException(e);
1297
      }
1298
 
1299
      var contentType = response.getHeader('Content-type');
1300
      if (this.options.evalJS == 'force'
1301
          || (this.options.evalJS && contentType
1302
          && contentType.match(/^\s*(text|application)\/(x-)?(java|ecma)script(;.*)?\s*$/i)))
1303
        this.evalResponse();
1304
    }
1305
 
1306
    try {
1307
      (this.options['on' + state] || Prototype.emptyFunction)(response, response.headerJSON);
1308
      Ajax.Responders.dispatch('on' + state, this, response, response.headerJSON);
1309
    } catch (e) {
1310
      this.dispatchException(e);
1311
    }
1312
 
1313
    if (state == 'Complete') {
1314
      // avoid memory leak in MSIE: clean up
1315
      this.transport.onreadystatechange = Prototype.emptyFunction;
1316
    }
1317
  },
1318
 
1319
  getHeader: function(name) {
1320
    try {
1321
      return this.transport.getResponseHeader(name) || null;
1322
    } catch (e) { return null }
1323
  },
1324
 
1325
  evalResponse: function() {
1326
    try {
1327
      return eval((this.transport.responseText || '').unfilterJSON());
1328
    } catch (e) {
1329
      this.dispatchException(e);
1330
    }
1331
  },
1332
 
1333
  dispatchException: function(exception) {
1334
    (this.options.onException || Prototype.emptyFunction)(this, exception);
1335
    Ajax.Responders.dispatch('onException', this, exception);
1336
  }
1337
});
1338
 
1339
Ajax.Request.Events =
1340
  ['Uninitialized', 'Loading', 'Loaded', 'Interactive', 'Complete'];
1341
 
1342
Ajax.Response = Class.create({
1343
  initialize: function(request){
1344
    this.request = request;
1345
    var transport  = this.transport  = request.transport,
1346
        readyState = this.readyState = transport.readyState;
1347
 
1348
    if((readyState > 2 && !Prototype.Browser.IE) || readyState == 4) {
1349
      this.status       = this.getStatus();
1350
      this.statusText   = this.getStatusText();
1351
      this.responseText = String.interpret(transport.responseText);
1352
      this.headerJSON   = this._getHeaderJSON();
1353
    }
1354
 
1355
    if(readyState == 4) {
1356
      var xml = transport.responseXML;
1357
      this.responseXML  = Object.isUndefined(xml) ? null : xml;
1358
      this.responseJSON = this._getResponseJSON();
1359
    }
1360
  },
1361
 
1362
  status:      0,
1363
  statusText: '',
1364
 
1365
  getStatus: Ajax.Request.prototype.getStatus,
1366
 
1367
  getStatusText: function() {
1368
    try {
1369
      return this.transport.statusText || '';
1370
    } catch (e) { return '' }
1371
  },
1372
 
1373
  getHeader: Ajax.Request.prototype.getHeader,
1374
 
1375
  getAllHeaders: function() {
1376
    try {
1377
      return this.getAllResponseHeaders();
1378
    } catch (e) { return null }
1379
  },
1380
 
1381
  getResponseHeader: function(name) {
1382
    return this.transport.getResponseHeader(name);
1383
  },
1384
 
1385
  getAllResponseHeaders: function() {
1386
    return this.transport.getAllResponseHeaders();
1387
  },
1388
 
1389
  _getHeaderJSON: function() {
1390
    var json = this.getHeader('X-JSON');
1391
    if (!json) return null;
1392
    json = decodeURIComponent(escape(json));
1393
    try {
1394
      return json.evalJSON(this.request.options.sanitizeJSON);
1395
    } catch (e) {
1396
      this.request.dispatchException(e);
1397
    }
1398
  },
1399
 
1400
  _getResponseJSON: function() {
1401
    var options = this.request.options;
1402
    if (!options.evalJSON || (options.evalJSON != 'force' &&
1403
      !(this.getHeader('Content-type') || '').include('application/json')) ||
1404
        this.responseText.blank())
1405
          return null;
1406
    try {
1407
      return this.responseText.evalJSON(options.sanitizeJSON);
1408
    } catch (e) {
1409
      this.request.dispatchException(e);
1410
    }
1411
  }
1412
});
1413
 
1414
Ajax.Updater = Class.create(Ajax.Request, {
1415
  initialize: function($super, container, url, options) {
1416
    this.container = {
1417
      success: (container.success || container),
1418
      failure: (container.failure || (container.success ? null : container))
1419
    };
1420
 
1421
    options = Object.clone(options);
1422
    var onComplete = options.onComplete;
1423
    options.onComplete = (function(response, json) {
1424
      this.updateContent(response.responseText);
1425
      if (Object.isFunction(onComplete)) onComplete(response, json);
1426
    }).bind(this);
1427
 
1428
    $super(url, options);
1429
  },
1430
 
1431
  updateContent: function(responseText) {
1432
    var receiver = this.container[this.success() ? 'success' : 'failure'],
1433
        options = this.options;
1434
 
1435
    if (!options.evalScripts) responseText = responseText.stripScripts();
1436
 
1437
    if (receiver = $(receiver)) {
1438
      if (options.insertion) {
1439
        if (Object.isString(options.insertion)) {
1440
          var insertion = { }; insertion[options.insertion] = responseText;
1441
          receiver.insert(insertion);
1442
        }
1443
        else options.insertion(receiver, responseText);
1444
      }
1445
      else receiver.update(responseText);
1446
    }
1447
  }
1448
});
1449
 
1450
Ajax.PeriodicalUpdater = Class.create(Ajax.Base, {
1451
  initialize: function($super, container, url, options) {
1452
    $super(options);
1453
    this.onComplete = this.options.onComplete;
1454
 
1455
    this.frequency = (this.options.frequency || 2);
1456
    this.decay = (this.options.decay || 1);
1457
 
1458
    this.updater = { };
1459
    this.container = container;
1460
    this.url = url;
1461
 
1462
    this.start();
1463
  },
1464
 
1465
  start: function() {
1466
    this.options.onComplete = this.updateComplete.bind(this);
1467
    this.onTimerEvent();
1468
  },
1469
 
1470
  stop: function() {
1471
    this.updater.options.onComplete = undefined;
1472
    clearTimeout(this.timer);
1473
    (this.onComplete || Prototype.emptyFunction).apply(this, arguments);
1474
  },
1475
 
1476
  updateComplete: function(response) {
1477
    if (this.options.decay) {
1478
      this.decay = (response.responseText == this.lastText ?
1479
        this.decay * this.options.decay : 1);
1480
 
1481
      this.lastText = response.responseText;
1482
    }
1483
    this.timer = this.onTimerEvent.bind(this).delay(this.decay * this.frequency);
1484
  },
1485
 
1486
  onTimerEvent: function() {
1487
    this.updater = new Ajax.Updater(this.container, this.url, this.options);
1488
  }
1489
});
1490
function $(element) {
1491
  if (arguments.length > 1) {
1492
    for (var i = 0, elements = [], length = arguments.length; i < length; i++)
1493
      elements.push($(arguments[i]));
1494
    return elements;
1495
  }
1496
  if (Object.isString(element))
1497
    element = document.getElementById(element);
1498
  return Element.extend(element);
1499
}
1500
 
1501
if (Prototype.BrowserFeatures.XPath) {
1502
  document._getElementsByXPath = function(expression, parentElement) {
1503
    var results = [];
1504
    var query = document.evaluate(expression, $(parentElement) || document,
1505
      null, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null);
1506
    for (var i = 0, length = query.snapshotLength; i < length; i++)
1507
      results.push(Element.extend(query.snapshotItem(i)));
1508
    return results;
1509
  };
1510
}
1511
 
1512
/*--------------------------------------------------------------------------*/
1513
 
1514
if (!window.Node) var Node = { };
1515
 
1516
if (!Node.ELEMENT_NODE) {
1517
  // DOM level 2 ECMAScript Language Binding
1518
  Object.extend(Node, {
1519
    ELEMENT_NODE: 1,
1520
    ATTRIBUTE_NODE: 2,
1521
    TEXT_NODE: 3,
1522
    CDATA_SECTION_NODE: 4,
1523
    ENTITY_REFERENCE_NODE: 5,
1524
    ENTITY_NODE: 6,
1525
    PROCESSING_INSTRUCTION_NODE: 7,
1526
    COMMENT_NODE: 8,
1527
    DOCUMENT_NODE: 9,
1528
    DOCUMENT_TYPE_NODE: 10,
1529
    DOCUMENT_FRAGMENT_NODE: 11,
1530
    NOTATION_NODE: 12
1531
  });
1532
}
1533
 
1534
(function() {
1535
  var element = this.Element;
1536
  this.Element = function(tagName, attributes) {
1537
    attributes = attributes || { };
1538
    tagName = tagName.toLowerCase();
1539
    var cache = Element.cache;
1540
    if (Prototype.Browser.IE && attributes.name) {
1541
      tagName = '<' + tagName + ' name="' + attributes.name + '">';
1542
      delete attributes.name;
1543
      return Element.writeAttribute(document.createElement(tagName), attributes);
1544
    }
1545
    if (!cache[tagName]) cache[tagName] = Element.extend(document.createElement(tagName));
1546
    return Element.writeAttribute(cache[tagName].cloneNode(false), attributes);
1547
  };
1548
  Object.extend(this.Element, element || { });
1549
}).call(window);
1550
 
1551
Element.cache = { };
1552
 
1553
Element.Methods = {
1554
  visible: function(element) {
1555
    return $(element).style.display != 'none';
1556
  },
1557
 
1558
  toggle: function(element) {
1559
    element = $(element);
1560
    Element[Element.visible(element) ? 'hide' : 'show'](element);
1561
    return element;
1562
  },
1563
 
1564
  hide: function(element) {
1565
    $(element).style.display = 'none';
1566
    return element;
1567
  },
1568
 
1569
  show: function(element) {
1570
    $(element).style.display = '';
1571
    return element;
1572
  },
1573
 
1574
  remove: function(element) {
1575
    element = $(element);
1576
    element.parentNode.removeChild(element);
1577
    return element;
1578
  },
1579
 
1580
  update: function(element, content) {
1581
    element = $(element);
1582
    if (content && content.toElement) content = content.toElement();
1583
    if (Object.isElement(content)) return element.update().insert(content);
1584
    content = Object.toHTML(content);
1585
    element.innerHTML = content.stripScripts();
1586
    content.evalScripts.bind(content).defer();
1587
    return element;
1588
  },
1589
 
1590
  replace: function(element, content) {
1591
    element = $(element);
1592
    if (content && content.toElement) content = content.toElement();
1593
    else if (!Object.isElement(content)) {
1594
      content = Object.toHTML(content);
1595
      var range = element.ownerDocument.createRange();
1596
      range.selectNode(element);
1597
      content.evalScripts.bind(content).defer();
1598
      content = range.createContextualFragment(content.stripScripts());
1599
    }
1600
    element.parentNode.replaceChild(content, element);
1601
    return element;
1602
  },
1603
 
1604
  insert: function(element, insertions) {
1605
    element = $(element);
1606
 
1607
    if (Object.isString(insertions) || Object.isNumber(insertions) ||
1608
        Object.isElement(insertions) || (insertions && (insertions.toElement || insertions.toHTML)))
1609
          insertions = {bottom:insertions};
1610
 
1611
    var content, insert, tagName, childNodes;
1612
 
1613
    for (position in insertions) {
1614
      content  = insertions[position];
1615
      position = position.toLowerCase();
1616
      insert = Element._insertionTranslations[position];
1617
 
1618
      if (content && content.toElement) content = content.toElement();
1619
      if (Object.isElement(content)) {
1620
        insert(element, content);
1621
        continue;
1622
      }
1623
 
1624
      content = Object.toHTML(content);
1625
 
1626
      tagName = ((position == 'before' || position == 'after')
1627
        ? element.parentNode : element).tagName.toUpperCase();
1628
 
1629
      childNodes = Element._getContentFromAnonymousElement(tagName, content.stripScripts());
1630
 
1631
      if (position == 'top' || position == 'after') childNodes.reverse();
1632
      childNodes.each(insert.curry(element));
1633
 
1634
      content.evalScripts.bind(content).defer();
1635
    }
1636
 
1637
    return element;
1638
  },
1639
 
1640
  wrap: function(element, wrapper, attributes) {
1641
    element = $(element);
1642
    if (Object.isElement(wrapper))
1643
      $(wrapper).writeAttribute(attributes || { });
1644
    else if (Object.isString(wrapper)) wrapper = new Element(wrapper, attributes);
1645
    else wrapper = new Element('div', wrapper);
1646
    if (element.parentNode)
1647
      element.parentNode.replaceChild(wrapper, element);
1648
    wrapper.appendChild(element);
1649
    return wrapper;
1650
  },
1651
 
1652
  inspect: function(element) {
1653
    element = $(element);
1654
    var result = '<' + element.tagName.toLowerCase();
1655
    $H({'id': 'id', 'className': 'class'}).each(function(pair) {
1656
      var property = pair.first(), attribute = pair.last();
1657
      var value = (element[property] || '').toString();
1658
      if (value) result += ' ' + attribute + '=' + value.inspect(true);
1659
    });
1660
    return result + '>';
1661
  },
1662
 
1663
  recursivelyCollect: function(element, property) {
1664
    element = $(element);
1665
    var elements = [];
1666
    while (element = element[property])
1667
      if (element.nodeType == 1)
1668
        elements.push(Element.extend(element));
1669
    return elements;
1670
  },
1671
 
1672
  ancestors: function(element) {
1673
    return $(element).recursivelyCollect('parentNode');
1674
  },
1675
 
1676
  descendants: function(element) {
1677
    return $(element).getElementsBySelector("*");
1678
  },
1679
 
1680
  firstDescendant: function(element) {
1681
    element = $(element).firstChild;
1682
    while (element && element.nodeType != 1) element = element.nextSibling;
1683
    return $(element);
1684
  },
1685
 
1686
  immediateDescendants: function(element) {
1687
    if (!(element = $(element).firstChild)) return [];
1688
    while (element && element.nodeType != 1) element = element.nextSibling;
1689
    if (element) return [element].concat($(element).nextSiblings());
1690
    return [];
1691
  },
1692
 
1693
  previousSiblings: function(element) {
1694
    return $(element).recursivelyCollect('previousSibling');
1695
  },
1696
 
1697
  nextSiblings: function(element) {
1698
    return $(element).recursivelyCollect('nextSibling');
1699
  },
1700
 
1701
  siblings: function(element) {
1702
    element = $(element);
1703
    return element.previousSiblings().reverse().concat(element.nextSiblings());
1704
  },
1705
 
1706
  match: function(element, selector) {
1707
    if (Object.isString(selector))
1708
      selector = new Selector(selector);
1709
    return selector.match($(element));
1710
  },
1711
 
1712
  up: function(element, expression, index) {
1713
    element = $(element);
1714
    if (arguments.length == 1) return $(element.parentNode);
1715
    var ancestors = element.ancestors();
1716
    return Object.isNumber(expression) ? ancestors[expression] :
1717
      Selector.findElement(ancestors, expression, index);
1718
  },
1719
 
1720
  down: function(element, expression, index) {
1721
    element = $(element);
1722
    if (arguments.length == 1) return element.firstDescendant();
1723
    return Object.isNumber(expression) ? element.descendants()[expression] :
1724
      element.select(expression)[index || 0];
1725
  },
1726
 
1727
  previous: function(element, expression, index) {
1728
    element = $(element);
1729
    if (arguments.length == 1) return $(Selector.handlers.previousElementSibling(element));
1730
    var previousSiblings = element.previousSiblings();
1731
    return Object.isNumber(expression) ? previousSiblings[expression] :
1732
      Selector.findElement(previousSiblings, expression, index);
1733
  },
1734
 
1735
  next: function(element, expression, index) {
1736
    element = $(element);
1737
    if (arguments.length == 1) return $(Selector.handlers.nextElementSibling(element));
1738
    var nextSiblings = element.nextSiblings();
1739
    return Object.isNumber(expression) ? nextSiblings[expression] :
1740
      Selector.findElement(nextSiblings, expression, index);
1741
  },
1742
 
1743
  select: function() {
1744
    var args = $A(arguments), element = $(args.shift());
1745
    return Selector.findChildElements(element, args);
1746
  },
1747
 
1748
  adjacent: function() {
1749
    var args = $A(arguments), element = $(args.shift());
1750
    return Selector.findChildElements(element.parentNode, args).without(element);
1751
  },
1752
 
1753
  identify: function(element) {
1754
    element = $(element);
1755
    var id = element.readAttribute('id'), self = arguments.callee;
1756
    if (id) return id;
1757
    do { id = 'anonymous_element_' + self.counter++ } while ($(id));
1758
    element.writeAttribute('id', id);
1759
    return id;
1760
  },
1761
 
1762
  readAttribute: function(element, name) {
1763
    element = $(element);
1764
    if (Prototype.Browser.IE) {
1765
      var t = Element._attributeTranslations.read;
1766
      if (t.values[name]) return t.values[name](element, name);
1767
      if (t.names[name]) name = t.names[name];
1768
      if (name.include(':')) {
1769
        return (!element.attributes || !element.attributes[name]) ? null :
1770
         element.attributes[name].value;
1771
      }
1772
    }
1773
    return element.getAttribute(name);
1774
  },
1775
 
1776
  writeAttribute: function(element, name, value) {
1777
    element = $(element);
1778
    var attributes = { }, t = Element._attributeTranslations.write;
1779
 
1780
    if (typeof name == 'object') attributes = name;
1781
    else attributes[name] = Object.isUndefined(value) ? true : value;
1782
 
1783
    for (var attr in attributes) {
1784
      name = t.names[attr] || attr;
1785
      value = attributes[attr];
1786
      if (t.values[attr]) name = t.values[attr](element, value);
1787
      if (value === false || value === null)
1788
        element.removeAttribute(name);
1789
      else if (value === true)
1790
        element.setAttribute(name, name);
1791
      else element.setAttribute(name, value);
1792
    }
1793
    return element;
1794
  },
1795
 
1796
  getHeight: function(element) {
1797
    return $(element).getDimensions().height;
1798
  },
1799
 
1800
  getWidth: function(element) {
1801
    return $(element).getDimensions().width;
1802
  },
1803
 
1804
  classNames: function(element) {
1805
    return new Element.ClassNames(element);
1806
  },
1807
 
1808
  hasClassName: function(element, className) {
1809
    if (!(element = $(element))) return;
1810
    var elementClassName = element.className;
1811
    return (elementClassName.length > 0 && (elementClassName == className ||
1812
      new RegExp("(^|\\s)" + className + "(\\s|$)").test(elementClassName)));
1813
  },
1814
 
1815
  addClassName: function(element, className) {
1816
    if (!(element = $(element))) return;
1817
    if (!element.hasClassName(className))
1818
      element.className += (element.className ? ' ' : '') + className;
1819
    return element;
1820
  },
1821
 
1822
  removeClassName: function(element, className) {
1823
    if (!(element = $(element))) return;
1824
    element.className = element.className.replace(
1825
      new RegExp("(^|\\s+)" + className + "(\\s+|$)"), ' ').strip();
1826
    return element;
1827
  },
1828
 
1829
  toggleClassName: function(element, className) {
1830
    if (!(element = $(element))) return;
1831
    return element[element.hasClassName(className) ?
1832
      'removeClassName' : 'addClassName'](className);
1833
  },
1834
 
1835
  // removes whitespace-only text node children
1836
  cleanWhitespace: function(element) {
1837
    element = $(element);
1838
    var node = element.firstChild;
1839
    while (node) {
1840
      var nextNode = node.nextSibling;
1841
      if (node.nodeType == 3 && !/\S/.test(node.nodeValue))
1842
        element.removeChild(node);
1843
      node = nextNode;
1844
    }
1845
    return element;
1846
  },
1847
 
1848
  empty: function(element) {
1849
    return $(element).innerHTML.blank();
1850
  },
1851
 
1852
  descendantOf: function(element, ancestor) {
1853
    element = $(element), ancestor = $(ancestor);
1854
    var originalAncestor = ancestor;
1855
 
1856
    if (element.compareDocumentPosition)
1857
      return (element.compareDocumentPosition(ancestor) & 8) === 8;
1858
 
1859
    if (element.sourceIndex && !Prototype.Browser.Opera) {
1860
      var e = element.sourceIndex, a = ancestor.sourceIndex,
1861
       nextAncestor = ancestor.nextSibling;
1862
      if (!nextAncestor) {
1863
        do { ancestor = ancestor.parentNode; }
1864
        while (!(nextAncestor = ancestor.nextSibling) && ancestor.parentNode);
1865
      }
1866
      if (nextAncestor) return (e > a && e < nextAncestor.sourceIndex);
1867
    }
1868
 
1869
    while (element = element.parentNode)
1870
      if (element == originalAncestor) return true;
1871
    return false;
1872
  },
1873
 
1874
  scrollTo: function(element) {
1875
    element = $(element);
1876
    var pos = element.cumulativeOffset();
1877
    window.scrollTo(pos[0], pos[1]);
1878
    return element;
1879
  },
1880
 
1881
  getStyle: function(element, style) {
1882
    element = $(element);
1883
    style = style == 'float' ? 'cssFloat' : style.camelize();
1884
    var value = element.style[style];
1885
    if (!value) {
1886
      var css = document.defaultView.getComputedStyle(element, null);
1887
      value = css ? css[style] : null;
1888
    }
1889
    if (style == 'opacity') return value ? parseFloat(value) : 1.0;
1890
    return value == 'auto' ? null : value;
1891
  },
1892
 
1893
  getOpacity: function(element) {
1894
    return $(element).getStyle('opacity');
1895
  },
1896
 
1897
  setStyle: function(element, styles) {
1898
    element = $(element);
1899
    var elementStyle = element.style, match;
1900
    if (Object.isString(styles)) {
1901
      element.style.cssText += ';' + styles;
1902
      return styles.include('opacity') ?
1903
        element.setOpacity(styles.match(/opacity:\s*(\d?\.?\d*)/)[1]) : element;
1904
    }
1905
    for (var property in styles)
1906
      if (property == 'opacity') element.setOpacity(styles[property]);
1907
      else
1908
        elementStyle[(property == 'float' || property == 'cssFloat') ?
1909
          (Object.isUndefined(elementStyle.styleFloat) ? 'cssFloat' : 'styleFloat') :
1910
            property] = styles[property];
1911
 
1912
    return element;
1913
  },
1914
 
1915
  setOpacity: function(element, value) {
1916
    element = $(element);
1917
    element.style.opacity = (value == 1 || value === '') ? '' :
1918
      (value < 0.00001) ? 0 : value;
1919
    return element;
1920
  },
1921
 
1922
  getDimensions: function(element) {
1923
    element = $(element);
1924
    var display = $(element).getStyle('display');
1925
    if (display != 'none' && display != null) // Safari bug
1926
      return {width: element.offsetWidth, height: element.offsetHeight};
1927
 
1928
    // All *Width and *Height properties give 0 on elements with display none,
1929
    // so enable the element temporarily
1930
    var els = element.style;
1931
    var originalVisibility = els.visibility;
1932
    var originalPosition = els.position;
1933
    var originalDisplay = els.display;
1934
    els.visibility = 'hidden';
1935
    els.position = 'absolute';
1936
    els.display = 'block';
1937
    var originalWidth = element.clientWidth;
1938
    var originalHeight = element.clientHeight;
1939
    els.display = originalDisplay;
1940
    els.position = originalPosition;
1941
    els.visibility = originalVisibility;
1942
    return {width: originalWidth, height: originalHeight};
1943
  },
1944
 
1945
  makePositioned: function(element) {
1946
    element = $(element);
1947
    var pos = Element.getStyle(element, 'position');
1948
    if (pos == 'static' || !pos) {
1949
      element._madePositioned = true;
1950
      element.style.position = 'relative';
1951
      // Opera returns the offset relative to the positioning context, when an
1952
      // element is position relative but top and left have not been defined
1953
      if (window.opera) {
1954
        element.style.top = 0;
1955
        element.style.left = 0;
1956
      }
1957
    }
1958
    return element;
1959
  },
1960
 
1961
  undoPositioned: function(element) {
1962
    element = $(element);
1963
    if (element._madePositioned) {
1964
      element._madePositioned = undefined;
1965
      element.style.position =
1966
        element.style.top =
1967
        element.style.left =
1968
        element.style.bottom =
1969
        element.style.right = '';
1970
    }
1971
    return element;
1972
  },
1973
 
1974
  makeClipping: function(element) {
1975
    element = $(element);
1976
    if (element._overflow) return element;
1977
    element._overflow = Element.getStyle(element, 'overflow') || 'auto';
1978
    if (element._overflow !== 'hidden')
1979
      element.style.overflow = 'hidden';
1980
    return element;
1981
  },
1982
 
1983
  undoClipping: function(element) {
1984
    element = $(element);
1985
    if (!element._overflow) return element;
1986
    element.style.overflow = element._overflow == 'auto' ? '' : element._overflow;
1987
    element._overflow = null;
1988
    return element;
1989
  },
1990
 
1991
  cumulativeOffset: function(element) {
1992
    var valueT = 0, valueL = 0;
1993
    do {
1994
      valueT += element.offsetTop  || 0;
1995
      valueL += element.offsetLeft || 0;
1996
      element = element.offsetParent;
1997
    } while (element);
1998
    return Element._returnOffset(valueL, valueT);
1999
  },
2000
 
2001
  positionedOffset: function(element) {
2002
    var valueT = 0, valueL = 0;
2003
    do {
2004
      valueT += element.offsetTop  || 0;
2005
      valueL += element.offsetLeft || 0;
2006
      element = element.offsetParent;
2007
      if (element) {
2008
        if (element.tagName == 'BODY') break;
2009
        var p = Element.getStyle(element, 'position');
2010
        if (p == 'relative' || p == 'absolute') break;
2011
      }
2012
    } while (element);
2013
    return Element._returnOffset(valueL, valueT);
2014
  },
2015
 
2016
  absolutize: function(element) {
2017
    element = $(element);
2018
    if (element.getStyle('position') == 'absolute') return;
2019
    // Position.prepare(); // To be done manually by Scripty when it needs it.
2020
 
2021
    var offsets = element.positionedOffset();
2022
    var top     = offsets[1];
2023
    var left    = offsets[0];
2024
    var width   = element.clientWidth;
2025
    var height  = element.clientHeight;
2026
 
2027
    element._originalLeft   = left - parseFloat(element.style.left  || 0);
2028
    element._originalTop    = top  - parseFloat(element.style.top || 0);
2029
    element._originalWidth  = element.style.width;
2030
    element._originalHeight = element.style.height;
2031
 
2032
    element.style.position = 'absolute';
2033
    element.style.top    = top + 'px';
2034
    element.style.left   = left + 'px';
2035
    element.style.width  = width + 'px';
2036
    element.style.height = height + 'px';
2037
    return element;
2038
  },
2039
 
2040
  relativize: function(element) {
2041
    element = $(element);
2042
    if (element.getStyle('position') == 'relative') return;
2043
    // Position.prepare(); // To be done manually by Scripty when it needs it.
2044
 
2045
    element.style.position = 'relative';
2046
    var top  = parseFloat(element.style.top  || 0) - (element._originalTop || 0);
2047
    var left = parseFloat(element.style.left || 0) - (element._originalLeft || 0);
2048
 
2049
    element.style.top    = top + 'px';
2050
    element.style.left   = left + 'px';
2051
    element.style.height = element._originalHeight;
2052
    element.style.width  = element._originalWidth;
2053
    return element;
2054
  },
2055
 
2056
  cumulativeScrollOffset: function(element) {
2057
    var valueT = 0, valueL = 0;
2058
    do {
2059
      valueT += element.scrollTop  || 0;
2060
      valueL += element.scrollLeft || 0;
2061
      element = element.parentNode;
2062
    } while (element);
2063
    return Element._returnOffset(valueL, valueT);
2064
  },
2065
 
2066
  getOffsetParent: function(element) {
2067
    if (element.offsetParent) return $(element.offsetParent);
2068
    if (element == document.body) return $(element);
2069
 
2070
    while ((element = element.parentNode) && element != document.body)
2071
      if (Element.getStyle(element, 'position') != 'static')
2072
        return $(element);
2073
 
2074
    return $(document.body);
2075
  },
2076
 
2077
  viewportOffset: function(forElement) {
2078
    var valueT = 0, valueL = 0;
2079
 
2080
    var element = forElement;
2081
    do {
2082
      valueT += element.offsetTop  || 0;
2083
      valueL += element.offsetLeft || 0;
2084
 
2085
      // Safari fix
2086
      if (element.offsetParent == document.body &&
2087
        Element.getStyle(element, 'position') == 'absolute') break;
2088
 
2089
    } while (element = element.offsetParent);
2090
 
2091
    element = forElement;
2092
    do {
2093
      if (!Prototype.Browser.Opera || element.tagName == 'BODY') {
2094
        valueT -= element.scrollTop  || 0;
2095
        valueL -= element.scrollLeft || 0;
2096
      }
2097
    } while (element = element.parentNode);
2098
 
2099
    return Element._returnOffset(valueL, valueT);
2100
  },
2101
 
2102
  clonePosition: function(element, source) {
2103
    var options = Object.extend({
2104
      setLeft:    true,
2105
      setTop:     true,
2106
      setWidth:   true,
2107
      setHeight:  true,
2108
      offsetTop:  0,
2109
      offsetLeft: 0
2110
    }, arguments[2] || { });
2111
 
2112
    // find page position of source
2113
    source = $(source);
2114
    var p = source.viewportOffset();
2115
 
2116
    // find coordinate system to use
2117
    element = $(element);
2118
    var delta = [0, 0];
2119
    var parent = null;
2120
    // delta [0,0] will do fine with position: fixed elements,
2121
    // position:absolute needs offsetParent deltas
2122
    if (Element.getStyle(element, 'position') == 'absolute') {
2123
      parent = element.getOffsetParent();
2124
      delta = parent.viewportOffset();
2125
    }
2126
 
2127
    // correct by body offsets (fixes Safari)
2128
    if (parent == document.body) {
2129
      delta[0] -= document.body.offsetLeft;
2130
      delta[1] -= document.body.offsetTop;
2131
    }
2132
 
2133
    // set position
2134
    if (options.setLeft)   element.style.left  = (p[0] - delta[0] + options.offsetLeft) + 'px';
2135
    if (options.setTop)    element.style.top   = (p[1] - delta[1] + options.offsetTop) + 'px';
2136
    if (options.setWidth)  element.style.width = source.offsetWidth + 'px';
2137
    if (options.setHeight) element.style.height = source.offsetHeight + 'px';
2138
    return element;
2139
  }
2140
};
2141
 
2142
Element.Methods.identify.counter = 1;
2143
 
2144
Object.extend(Element.Methods, {
2145
  getElementsBySelector: Element.Methods.select,
2146
  childElements: Element.Methods.immediateDescendants
2147
});
2148
 
2149
Element._attributeTranslations = {
2150
  write: {
2151
    names: {
2152
      className: 'class',
2153
      htmlFor:   'for'
2154
    },
2155
    values: { }
2156
  }
2157
};
2158
 
2159
if (Prototype.Browser.Opera) {
2160
  Element.Methods.getStyle = Element.Methods.getStyle.wrap(
2161
    function(proceed, element, style) {
2162
      switch (style) {
2163
        case 'left': case 'top': case 'right': case 'bottom':
2164
          if (proceed(element, 'position') === 'static') return null;
2165
        case 'height': case 'width':
2166
          // returns '0px' for hidden elements; we want it to return null
2167
          if (!Element.visible(element)) return null;
2168
 
2169
          // returns the border-box dimensions rather than the content-box
2170
          // dimensions, so we subtract padding and borders from the value
2171
          var dim = parseInt(proceed(element, style), 10);
2172
 
2173
          if (dim !== element['offset' + style.capitalize()])
2174
            return dim + 'px';
2175
 
2176
          var properties;
2177
          if (style === 'height') {
2178
            properties = ['border-top-width', 'padding-top',
2179
             'padding-bottom', 'border-bottom-width'];
2180
          }
2181
          else {
2182
            properties = ['border-left-width', 'padding-left',
2183
             'padding-right', 'border-right-width'];
2184
          }
2185
          return properties.inject(dim, function(memo, property) {
2186
            var val = proceed(element, property);
2187
            return val === null ? memo : memo - parseInt(val, 10);
2188
          }) + 'px';
2189
        default: return proceed(element, style);
2190
      }
2191
    }
2192
  );
2193
 
2194
  Element.Methods.readAttribute = Element.Methods.readAttribute.wrap(
2195
    function(proceed, element, attribute) {
2196
      if (attribute === 'title') return element.title;
2197
      return proceed(element, attribute);
2198
    }
2199
  );
2200
}
2201
 
2202
else if (Prototype.Browser.IE) {
2203
  $w('positionedOffset getOffsetParent viewportOffset').each(function(method) {
2204
    Element.Methods[method] = Element.Methods[method].wrap(
2205
      function(proceed, element) {
2206
        element = $(element);
2207
        var position = element.getStyle('position');
2208
        if (position != 'static') return proceed(element);
2209
        element.setStyle({ position: 'relative' });
2210
        var value = proceed(element);
2211
        element.setStyle({ position: position });
2212
        return value;
2213
      }
2214
    );
2215
  });
2216
 
2217
  Element.Methods.getStyle = function(element, style) {
2218
    element = $(element);
2219
    style = (style == 'float' || style == 'cssFloat') ? 'styleFloat' : style.camelize();
2220
    var value = element.style[style];
2221
    if (!value && element.currentStyle) value = element.currentStyle[style];
2222
 
2223
    if (style == 'opacity') {
2224
      if (value = (element.getStyle('filter') || '').match(/alpha\(opacity=(.*)\)/))
2225
        if (value[1]) return parseFloat(value[1]) / 100;
2226
      return 1.0;
2227
    }
2228
 
2229
    if (value == 'auto') {
2230
      if ((style == 'width' || style == 'height') && (element.getStyle('display') != 'none'))
2231
        return element['offset' + style.capitalize()] + 'px';
2232
      return null;
2233
    }
2234
    return value;
2235
  };
2236
 
2237
  Element.Methods.setOpacity = function(element, value) {
2238
    function stripAlpha(filter){
2239
      return filter.replace(/alpha\([^\)]*\)/gi,'');
2240
    }
2241
    element = $(element);
2242
    var currentStyle = element.currentStyle;
2243
    if ((currentStyle && !currentStyle.hasLayout) ||
2244
      (!currentStyle && element.style.zoom == 'normal'))
2245
        element.style.zoom = 1;
2246
 
2247
    var filter = element.getStyle('filter'), style = element.style;
2248
    if (value == 1 || value === '') {
2249
      (filter = stripAlpha(filter)) ?
2250
        style.filter = filter : style.removeAttribute('filter');
2251
      return element;
2252
    } else if (value < 0.00001) value = 0;
2253
    style.filter = stripAlpha(filter) +
2254
      'alpha(opacity=' + (value * 100) + ')';
2255
    return element;
2256
  };
2257
 
2258
  Element._attributeTranslations = {
2259
    read: {
2260
      names: {
2261
        'class': 'className',
2262
        'for':   'htmlFor'
2263
      },
2264
      values: {
2265
        _getAttr: function(element, attribute) {
2266
          return element.getAttribute(attribute, 2);
2267
        },
2268
        _getAttrNode: function(element, attribute) {
2269
          var node = element.getAttributeNode(attribute);
2270
          return node ? node.value : "";
2271
        },
2272
        _getEv: function(element, attribute) {
2273
          attribute = element.getAttribute(attribute);
2274
          return attribute ? attribute.toString().slice(23, -2) : null;
2275
        },
2276
        _flag: function(element, attribute) {
2277
          return $(element).hasAttribute(attribute) ? attribute : null;
2278
        },
2279
        style: function(element) {
2280
          return element.style.cssText.toLowerCase();
2281
        },
2282
        title: function(element) {
2283
          return element.title;
2284
        }
2285
      }
2286
    }
2287
  };
2288
 
2289
  Element._attributeTranslations.write = {
2290
    names: Object.clone(Element._attributeTranslations.read.names),
2291
    values: {
2292
      checked: function(element, value) {
2293
        element.checked = !!value;
2294
      },
2295
 
2296
      style: function(element, value) {
2297
        element.style.cssText = value ? value : '';
2298
      }
2299
    }
2300
  };
2301
 
2302
  Element._attributeTranslations.has = {};
2303
 
2304
  $w('colSpan rowSpan vAlign dateTime accessKey tabIndex ' +
2305
      'encType maxLength readOnly longDesc').each(function(attr) {
2306
    Element._attributeTranslations.write.names[attr.toLowerCase()] = attr;
2307
    Element._attributeTranslations.has[attr.toLowerCase()] = attr;
2308
  });
2309
 
2310
  (function(v) {
2311
    Object.extend(v, {
2312
      href:        v._getAttr,
2313
      src:         v._getAttr,
2314
      type:        v._getAttr,
2315
      action:      v._getAttrNode,
2316
      disabled:    v._flag,
2317
      checked:     v._flag,
2318
      readonly:    v._flag,
2319
      multiple:    v._flag,
2320
      onload:      v._getEv,
2321
      onunload:    v._getEv,
2322
      onclick:     v._getEv,
2323
      ondblclick:  v._getEv,
2324
      onmousedown: v._getEv,
2325
      onmouseup:   v._getEv,
2326
      onmouseover: v._getEv,
2327
      onmousemove: v._getEv,
2328
      onmouseout:  v._getEv,
2329
      onfocus:     v._getEv,
2330
      onblur:      v._getEv,
2331
      onkeypress:  v._getEv,
2332
      onkeydown:   v._getEv,
2333
      onkeyup:     v._getEv,
2334
      onsubmit:    v._getEv,
2335
      onreset:     v._getEv,
2336
      onselect:    v._getEv,
2337
      onchange:    v._getEv
2338
    });
2339
  })(Element._attributeTranslations.read.values);
2340
}
2341
 
2342
else if (Prototype.Browser.Gecko && /rv:1\.8\.0/.test(navigator.userAgent)) {
2343
  Element.Methods.setOpacity = function(element, value) {
2344
    element = $(element);
2345
    element.style.opacity = (value == 1) ? 0.999999 :
2346
      (value === '') ? '' : (value < 0.00001) ? 0 : value;
2347
    return element;
2348
  };
2349
}
2350
 
2351
else if (Prototype.Browser.WebKit) {
2352
  Element.Methods.setOpacity = function(element, value) {
2353
    element = $(element);
2354
    element.style.opacity = (value == 1 || value === '') ? '' :
2355
      (value < 0.00001) ? 0 : value;
2356
 
2357
    if (value == 1)
2358
      if(element.tagName == 'IMG' && element.width) {
2359
        element.width++; element.width--;
2360
      } else try {
2361
        var n = document.createTextNode(' ');
2362
        element.appendChild(n);
2363
        element.removeChild(n);
2364
      } catch (e) { }
2365
 
2366
    return element;
2367
  };
2368
 
2369
  // Safari returns margins on body which is incorrect if the child is absolutely
2370
  // positioned.  For performance reasons, redefine Element#cumulativeOffset for
2371
  // KHTML/WebKit only.
2372
  Element.Methods.cumulativeOffset = function(element) {
2373
    var valueT = 0, valueL = 0;
2374
    do {
2375
      valueT += element.offsetTop  || 0;
2376
      valueL += element.offsetLeft || 0;
2377
      if (element.offsetParent == document.body)
2378
        if (Element.getStyle(element, 'position') == 'absolute') break;
2379
 
2380
      element = element.offsetParent;
2381
    } while (element);
2382
 
2383
    return Element._returnOffset(valueL, valueT);
2384
  };
2385
}
2386
 
2387
if (Prototype.Browser.IE || Prototype.Browser.Opera) {
2388
  // IE and Opera are missing .innerHTML support for TABLE-related and SELECT elements
2389
  Element.Methods.update = function(element, content) {
2390
    element = $(element);
2391
 
2392
    if (content && content.toElement) content = content.toElement();
2393
    if (Object.isElement(content)) return element.update().insert(content);
2394
 
2395
    content = Object.toHTML(content);
2396
    var tagName = element.tagName.toUpperCase();
2397
 
2398
    if (tagName in Element._insertionTranslations.tags) {
2399
      $A(element.childNodes).each(function(node) { element.removeChild(node) });
2400
      Element._getContentFromAnonymousElement(tagName, content.stripScripts())
2401
        .each(function(node) { element.appendChild(node) });
2402
    }
2403
    else element.innerHTML = content.stripScripts();
2404
 
2405
    content.evalScripts.bind(content).defer();
2406
    return element;
2407
  };
2408
}
2409
 
2410
if (document.createElement('div').outerHTML) {
2411
  Element.Methods.replace = function(element, content) {
2412
    element = $(element);
2413
 
2414
    if (content && content.toElement) content = content.toElement();
2415
    if (Object.isElement(content)) {
2416
      element.parentNode.replaceChild(content, element);
2417
      return element;
2418
    }
2419
 
2420
    content = Object.toHTML(content);
2421
    var parent = element.parentNode, tagName = parent.tagName.toUpperCase();
2422
 
2423
    if (Element._insertionTranslations.tags[tagName]) {
2424
      var nextSibling = element.next();
2425
      var fragments = Element._getContentFromAnonymousElement(tagName, content.stripScripts());
2426
      parent.removeChild(element);
2427
      if (nextSibling)
2428
        fragments.each(function(node) { parent.insertBefore(node, nextSibling) });
2429
      else
2430
        fragments.each(function(node) { parent.appendChild(node) });
2431
    }
2432
    else element.outerHTML = content.stripScripts();
2433
 
2434
    content.evalScripts.bind(content).defer();
2435
    return element;
2436
  };
2437
}
2438
 
2439
Element._returnOffset = function(l, t) {
2440
  var result = [l, t];
2441
  result.left = l;
2442
  result.top = t;
2443
  return result;
2444
};
2445
 
2446
Element._getContentFromAnonymousElement = function(tagName, html) {
2447
  var div = new Element('div'), t = Element._insertionTranslations.tags[tagName];
2448
  if (t) {
2449
    div.innerHTML = t[0] + html + t[1];
2450
    t[2].times(function() { div = div.firstChild });
2451
  } else div.innerHTML = html;
2452
  return $A(div.childNodes);
2453
};
2454
 
2455
Element._insertionTranslations = {
2456
  before: function(element, node) {
2457
    element.parentNode.insertBefore(node, element);
2458
  },
2459
  top: function(element, node) {
2460
    element.insertBefore(node, element.firstChild);
2461
  },
2462
  bottom: function(element, node) {
2463
    element.appendChild(node);
2464
  },
2465
  after: function(element, node) {
2466
    element.parentNode.insertBefore(node, element.nextSibling);
2467
  },
2468
  tags: {
2469
    TABLE:  ['<table>',                '</table>',                   1],
2470
    TBODY:  ['<table><tbody>',         '</tbody></table>',           2],
2471
    TR:     ['<table><tbody><tr>',     '</tr></tbody></table>',      3],
2472
    TD:     ['<table><tbody><tr><td>', '</td></tr></tbody></table>', 4],
2473
    SELECT: ['<select>',               '</select>',                  1]
2474
  }
2475
};
2476
 
2477
(function() {
2478
  Object.extend(this.tags, {
2479
    THEAD: this.tags.TBODY,
2480
    TFOOT: this.tags.TBODY,
2481
    TH:    this.tags.TD
2482
  });
2483
}).call(Element._insertionTranslations);
2484
 
2485
Element.Methods.Simulated = {
2486
  hasAttribute: function(element, attribute) {
2487
    attribute = Element._attributeTranslations.has[attribute] || attribute;
2488
    var node = $(element).getAttributeNode(attribute);
2489
    return node && node.specified;
2490
  }
2491
};
2492
 
2493
Element.Methods.ByTag = { };
2494
 
2495
Object.extend(Element, Element.Methods);
2496
 
2497
if (!Prototype.BrowserFeatures.ElementExtensions &&
2498
    document.createElement('div').__proto__) {
2499
  window.HTMLElement = { };
2500
  window.HTMLElement.prototype = document.createElement('div').__proto__;
2501
  Prototype.BrowserFeatures.ElementExtensions = true;
2502
}
2503
 
2504
Element.extend = (function() {
2505
  if (Prototype.BrowserFeatures.SpecificElementExtensions)
2506
    return Prototype.K;
2507
 
2508
  var Methods = { }, ByTag = Element.Methods.ByTag;
2509
 
2510
  var extend = Object.extend(function(element) {
2511
    if (!element || element._extendedByPrototype ||
2512
        element.nodeType != 1 || element == window) return element;
2513
 
2514
    var methods = Object.clone(Methods),
2515
      tagName = element.tagName, property, value;
2516
 
2517
    // extend methods for specific tags
2518
    if (ByTag[tagName]) Object.extend(methods, ByTag[tagName]);
2519
 
2520
    for (property in methods) {
2521
      value = methods[property];
2522
      if (Object.isFunction(value) && !(property in element))
2523
        element[property] = value.methodize();
2524
    }
2525
 
2526
    element._extendedByPrototype = Prototype.emptyFunction;
2527
    return element;
2528
 
2529
  }, {
2530
    refresh: function() {
2531
      // extend methods for all tags (Safari doesn't need this)
2532
      if (!Prototype.BrowserFeatures.ElementExtensions) {
2533
        Object.extend(Methods, Element.Methods);
2534
        Object.extend(Methods, Element.Methods.Simulated);
2535
      }
2536
    }
2537
  });
2538
 
2539
  extend.refresh();
2540
  return extend;
2541
})();
2542
 
2543
Element.hasAttribute = function(element, attribute) {
2544
  if (element.hasAttribute) return element.hasAttribute(attribute);
2545
  return Element.Methods.Simulated.hasAttribute(element, attribute);
2546
};
2547
 
2548
Element.addMethods = function(methods) {
2549
  var F = Prototype.BrowserFeatures, T = Element.Methods.ByTag;
2550
 
2551
  if (!methods) {
2552
    Object.extend(Form, Form.Methods);
2553
    Object.extend(Form.Element, Form.Element.Methods);
2554
    Object.extend(Element.Methods.ByTag, {
2555
      "FORM":     Object.clone(Form.Methods),
2556
      "INPUT":    Object.clone(Form.Element.Methods),
2557
      "SELECT":   Object.clone(Form.Element.Methods),
2558
      "TEXTAREA": Object.clone(Form.Element.Methods)
2559
    });
2560
  }
2561
 
2562
  if (arguments.length == 2) {
2563
    var tagName = methods;
2564
    methods = arguments[1];
2565
  }
2566
 
2567
  if (!tagName) Object.extend(Element.Methods, methods || { });
2568
  else {
2569
    if (Object.isArray(tagName)) tagName.each(extend);
2570
    else extend(tagName);
2571
  }
2572
 
2573
  function extend(tagName) {
2574
    tagName = tagName.toUpperCase();
2575
    if (!Element.Methods.ByTag[tagName])
2576
      Element.Methods.ByTag[tagName] = { };
2577
    Object.extend(Element.Methods.ByTag[tagName], methods);
2578
  }
2579
 
2580
  function copy(methods, destination, onlyIfAbsent) {
2581
    onlyIfAbsent = onlyIfAbsent || false;
2582
    for (var property in methods) {
2583
      var value = methods[property];
2584
      if (!Object.isFunction(value)) continue;
2585
      if (!onlyIfAbsent || !(property in destination))
2586
        destination[property] = value.methodize();
2587
    }
2588
  }
2589
 
2590
  function findDOMClass(tagName) {
2591
    var klass;
2592
    var trans = {
2593
      "OPTGROUP": "OptGroup", "TEXTAREA": "TextArea", "P": "Paragraph",
2594
      "FIELDSET": "FieldSet", "UL": "UList", "OL": "OList", "DL": "DList",
2595
      "DIR": "Directory", "H1": "Heading", "H2": "Heading", "H3": "Heading",
2596
      "H4": "Heading", "H5": "Heading", "H6": "Heading", "Q": "Quote",
2597
      "INS": "Mod", "DEL": "Mod", "A": "Anchor", "IMG": "Image", "CAPTION":
2598
      "TableCaption", "COL": "TableCol", "COLGROUP": "TableCol", "THEAD":
2599
      "TableSection", "TFOOT": "TableSection", "TBODY": "TableSection", "TR":
2600
      "TableRow", "TH": "TableCell", "TD": "TableCell", "FRAMESET":
2601
      "FrameSet", "IFRAME": "IFrame"
2602
    };
2603
    if (trans[tagName]) klass = 'HTML' + trans[tagName] + 'Element';
2604
    if (window[klass]) return window[klass];
2605
    klass = 'HTML' + tagName + 'Element';
2606
    if (window[klass]) return window[klass];
2607
    klass = 'HTML' + tagName.capitalize() + 'Element';
2608
    if (window[klass]) return window[klass];
2609
 
2610
    window[klass] = { };
2611
    window[klass].prototype = document.createElement(tagName).__proto__;
2612
    return window[klass];
2613
  }
2614
 
2615
  if (F.ElementExtensions) {
2616
    copy(Element.Methods, HTMLElement.prototype);
2617
    copy(Element.Methods.Simulated, HTMLElement.prototype, true);
2618
  }
2619
 
2620
  if (F.SpecificElementExtensions) {
2621
    for (var tag in Element.Methods.ByTag) {
2622
      var klass = findDOMClass(tag);
2623
      if (Object.isUndefined(klass)) continue;
2624
      copy(T[tag], klass.prototype);
2625
    }
2626
  }
2627
 
2628
  Object.extend(Element, Element.Methods);
2629
  delete Element.ByTag;
2630
 
2631
  if (Element.extend.refresh) Element.extend.refresh();
2632
  Element.cache = { };
2633
};
2634
 
2635
document.viewport = {
2636
  getDimensions: function() {
2637
    var dimensions = { };
2638
    var B = Prototype.Browser;
2639
    $w('width height').each(function(d) {
2640
      var D = d.capitalize();
2641
      dimensions[d] = (B.WebKit && !document.evaluate) ? self['inner' + D] :
2642
        (B.Opera) ? document.body['client' + D] : document.documentElement['client' + D];
2643
    });
2644
    return dimensions;
2645
  },
2646
 
2647
  getWidth: function() {
2648
    return this.getDimensions().width;
2649
  },
2650
 
2651
  getHeight: function() {
2652
    return this.getDimensions().height;
2653
  },
2654
 
2655
  getScrollOffsets: function() {
2656
    return Element._returnOffset(
2657
      window.pageXOffset || document.documentElement.scrollLeft || document.body.scrollLeft,
2658
      window.pageYOffset || document.documentElement.scrollTop || document.body.scrollTop);
2659
  }
2660
};
2661
/* Portions of the Selector class are derived from Jack Slocum’s DomQuery,
2662
 * part of YUI-Ext version 0.40, distributed under the terms of an MIT-style
2663
 * license.  Please see http://www.yui-ext.com/ for more information. */
2664
 
2665
var Selector = Class.create({
2666
  initialize: function(expression) {
2667
    this.expression = expression.strip();
2668
    this.compileMatcher();
2669
  },
2670
 
2671
  shouldUseXPath: function() {
2672
    if (!Prototype.BrowserFeatures.XPath) return false;
2673
 
2674
    var e = this.expression;
2675
 
2676
    // Safari 3 chokes on :*-of-type and :empty
2677
    if (Prototype.Browser.WebKit &&
2678
     (e.include("-of-type") || e.include(":empty")))
2679
      return false;
2680
 
2681
    // XPath can't do namespaced attributes, nor can it read
2682
    // the "checked" property from DOM nodes
2683
    if ((/(\[[\w-]*?:|:checked)/).test(this.expression))
2684
      return false;
2685
 
2686
    return true;
2687
  },
2688
 
2689
  compileMatcher: function() {
2690
    if (this.shouldUseXPath())
2691
      return this.compileXPathMatcher();
2692
 
2693
    var e = this.expression, ps = Selector.patterns, h = Selector.handlers,
2694
        c = Selector.criteria, le, p, m;
2695
 
2696
    if (Selector._cache[e]) {
2697
      this.matcher = Selector._cache[e];
2698
      return;
2699
    }
2700
 
2701
    this.matcher = ["this.matcher = function(root) {",
2702
                    "var r = root, h = Selector.handlers, c = false, n;"];
2703
 
2704
    while (e && le != e && (/\S/).test(e)) {
2705
      le = e;
2706
      for (var i in ps) {
2707
        p = ps[i];
2708
        if (m = e.match(p)) {
2709
          this.matcher.push(Object.isFunction(c[i]) ? c[i](m) :
2710
    	      new Template(c[i]).evaluate(m));
2711
          e = e.replace(m[0], '');
2712
          break;
2713
        }
2714
      }
2715
    }
2716
 
2717
    this.matcher.push("return h.unique(n);\n}");
2718
    eval(this.matcher.join('\n'));
2719
    Selector._cache[this.expression] = this.matcher;
2720
  },
2721
 
2722
  compileXPathMatcher: function() {
2723
    var e = this.expression, ps = Selector.patterns,
2724
        x = Selector.xpath, le, m;
2725
 
2726
    if (Selector._cache[e]) {
2727
      this.xpath = Selector._cache[e]; return;
2728
    }
2729
 
2730
    this.matcher = ['.//*'];
2731
    while (e && le != e && (/\S/).test(e)) {
2732
      le = e;
2733
      for (var i in ps) {
2734
        if (m = e.match(ps[i])) {
2735
          this.matcher.push(Object.isFunction(x[i]) ? x[i](m) :
2736
            new Template(x[i]).evaluate(m));
2737
          e = e.replace(m[0], '');
2738
          break;
2739
        }
2740
      }
2741
    }
2742
 
2743
    this.xpath = this.matcher.join('');
2744
    Selector._cache[this.expression] = this.xpath;
2745
  },
2746
 
2747
  findElements: function(root) {
2748
    root = root || document;
2749
    if (this.xpath) return document._getElementsByXPath(this.xpath, root);
2750
    return this.matcher(root);
2751
  },
2752
 
2753
  match: function(element) {
2754
    this.tokens = [];
2755
 
2756
    var e = this.expression, ps = Selector.patterns, as = Selector.assertions;
2757
    var le, p, m;
2758
 
2759
    while (e && le !== e && (/\S/).test(e)) {
2760
      le = e;
2761
      for (var i in ps) {
2762
        p = ps[i];
2763
        if (m = e.match(p)) {
2764
          // use the Selector.assertions methods unless the selector
2765
          // is too complex.
2766
          if (as[i]) {
2767
            this.tokens.push([i, Object.clone(m)]);
2768
            e = e.replace(m[0], '');
2769
          } else {
2770
            // reluctantly do a document-wide search
2771
            // and look for a match in the array
2772
            return this.findElements(document).include(element);
2773
          }
2774
        }
2775
      }
2776
    }
2777
 
2778
    var match = true, name, matches;
2779
    for (var i = 0, token; token = this.tokens[i]; i++) {
2780
      name = token[0], matches = token[1];
2781
      if (!Selector.assertions[name](element, matches)) {
2782
        match = false; break;
2783
      }
2784
    }
2785
 
2786
    return match;
2787
  },
2788
 
2789
  toString: function() {
2790
    return this.expression;
2791
  },
2792
 
2793
  inspect: function() {
2794
    return "#<Selector:" + this.expression.inspect() + ">";
2795
  }
2796
});
2797
 
2798
Object.extend(Selector, {
2799
  _cache: { },
2800
 
2801
  xpath: {
2802
    descendant:   "//*",
2803
    child:        "/*",
2804
    adjacent:     "/following-sibling::*[1]",
2805
    laterSibling: '/following-sibling::*',
2806
    tagName:      function(m) {
2807
      if (m[1] == '*') return '';
2808
      return "[local-name()='" + m[1].toLowerCase() +
2809
             "' or local-name()='" + m[1].toUpperCase() + "']";
2810
    },
2811
    className:    "[contains(concat(' ', @class, ' '), ' #{1} ')]",
2812
    id:           "[@id='#{1}']",
2813
    attrPresence: function(m) {
2814
      m[1] = m[1].toLowerCase();
2815
      return new Template("[@#{1}]").evaluate(m);
2816
    },
2817
    attr: function(m) {
2818
      m[1] = m[1].toLowerCase();
2819
      m[3] = m[5] || m[6];
2820
      return new Template(Selector.xpath.operators[m[2]]).evaluate(m);
2821
    },
2822
    pseudo: function(m) {
2823
      var h = Selector.xpath.pseudos[m[1]];
2824
      if (!h) return '';
2825
      if (Object.isFunction(h)) return h(m);
2826
      return new Template(Selector.xpath.pseudos[m[1]]).evaluate(m);
2827
    },
2828
    operators: {
2829
      '=':  "[@#{1}='#{3}']",
2830
      '!=': "[@#{1}!='#{3}']",
2831
      '^=': "[starts-with(@#{1}, '#{3}')]",
2832
      '$=': "[substring(@#{1}, (string-length(@#{1}) - string-length('#{3}') + 1))='#{3}']",
2833
      '*=': "[contains(@#{1}, '#{3}')]",
2834
      '~=': "[contains(concat(' ', @#{1}, ' '), ' #{3} ')]",
2835
      '|=': "[contains(concat('-', @#{1}, '-'), '-#{3}-')]"
2836
    },
2837
    pseudos: {
2838
      'first-child': '[not(preceding-sibling::*)]',
2839
      'last-child':  '[not(following-sibling::*)]',
2840
      'only-child':  '[not(preceding-sibling::* or following-sibling::*)]',
2841
      'empty':       "[count(*) = 0 and (count(text()) = 0 or translate(text(), ' \t\r\n', '') = '')]",
2842
      'checked':     "[@checked]",
2843
      'disabled':    "[@disabled]",
2844
      'enabled':     "[not(@disabled)]",
2845
      'not': function(m) {
2846
        var e = m[6], p = Selector.patterns,
2847
            x = Selector.xpath, le, v;
2848
 
2849
        var exclusion = [];
2850
        while (e && le != e && (/\S/).test(e)) {
2851
          le = e;
2852
          for (var i in p) {
2853
            if (m = e.match(p[i])) {
2854
              v = Object.isFunction(x[i]) ? x[i](m) : new Template(x[i]).evaluate(m);
2855
              exclusion.push("(" + v.substring(1, v.length - 1) + ")");
2856
              e = e.replace(m[0], '');
2857
              break;
2858
            }
2859
          }
2860
        }
2861
        return "[not(" + exclusion.join(" and ") + ")]";
2862
      },
2863
      'nth-child':      function(m) {
2864
        return Selector.xpath.pseudos.nth("(count(./preceding-sibling::*) + 1) ", m);
2865
      },
2866
      'nth-last-child': function(m) {
2867
        return Selector.xpath.pseudos.nth("(count(./following-sibling::*) + 1) ", m);
2868
      },
2869
      'nth-of-type':    function(m) {
2870
        return Selector.xpath.pseudos.nth("position() ", m);
2871
      },
2872
      'nth-last-of-type': function(m) {
2873
        return Selector.xpath.pseudos.nth("(last() + 1 - position()) ", m);
2874
      },
2875
      'first-of-type':  function(m) {
2876
        m[6] = "1"; return Selector.xpath.pseudos['nth-of-type'](m);
2877
      },
2878
      'last-of-type':   function(m) {
2879
        m[6] = "1"; return Selector.xpath.pseudos['nth-last-of-type'](m);
2880
      },
2881
      'only-of-type':   function(m) {
2882
        var p = Selector.xpath.pseudos; return p['first-of-type'](m) + p['last-of-type'](m);
2883
      },
2884
      nth: function(fragment, m) {
2885
        var mm, formula = m[6], predicate;
2886
        if (formula == 'even') formula = '2n+0';
2887
        if (formula == 'odd')  formula = '2n+1';
2888
        if (mm = formula.match(/^(\d+)$/)) // digit only
2889
          return '[' + fragment + "= " + mm[1] + ']';
2890
        if (mm = formula.match(/^(-?\d*)?n(([+-])(\d+))?/)) { // an+b
2891
          if (mm[1] == "-") mm[1] = -1;
2892
          var a = mm[1] ? Number(mm[1]) : 1;
2893
          var b = mm[2] ? Number(mm[2]) : 0;
2894
          predicate = "[((#{fragment} - #{b}) mod #{a} = 0) and " +
2895
          "((#{fragment} - #{b}) div #{a} >= 0)]";
2896
          return new Template(predicate).evaluate({
2897
            fragment: fragment, a: a, b: b });
2898
        }
2899
      }
2900
    }
2901
  },
2902
 
2903
  criteria: {
2904
    tagName:      'n = h.tagName(n, r, "#{1}", c);   c = false;',
2905
    className:    'n = h.className(n, r, "#{1}", c); c = false;',
2906
    id:           'n = h.id(n, r, "#{1}", c);        c = false;',
2907
    attrPresence: 'n = h.attrPresence(n, r, "#{1}"); c = false;',
2908
    attr: function(m) {
2909
      m[3] = (m[5] || m[6]);
2910
      return new Template('n = h.attr(n, r, "#{1}", "#{3}", "#{2}"); c = false;').evaluate(m);
2911
    },
2912
    pseudo: function(m) {
2913
      if (m[6]) m[6] = m[6].replace(/"/g, '\\"');
2914
      return new Template('n = h.pseudo(n, "#{1}", "#{6}", r, c); c = false;').evaluate(m);
2915
    },
2916
    descendant:   'c = "descendant";',
2917
    child:        'c = "child";',
2918
    adjacent:     'c = "adjacent";',
2919
    laterSibling: 'c = "laterSibling";'
2920
  },
2921
 
2922
  patterns: {
2923
    // combinators must be listed first
2924
    // (and descendant needs to be last combinator)
2925
    laterSibling: /^\s*~\s*/,
2926
    child:        /^\s*>\s*/,
2927
    adjacent:     /^\s*\+\s*/,
2928
    descendant:   /^\s/,
2929
 
2930
    // selectors follow
2931
    tagName:      /^\s*(\*|[\w\-]+)(\b|$)?/,
2932
    id:           /^#([\w\-\*]+)(\b|$)/,
2933
    className:    /^\.([\w\-\*]+)(\b|$)/,
2934
    pseudo:
2935
/^:((first|last|nth|nth-last|only)(-child|-of-type)|empty|checked|(en|dis)abled|not)(\((.*?)\))?(\b|$|(?=\s|[:+~>]))/,
2936
    attrPresence: /^\[([\w]+)\]/,
2937
    attr:         /\[((?:[\w-]*:)?[\w-]+)\s*(?:([!^$*~|]?=)\s*((['"])([^\4]*?)\4|([^'"][^\]]*?)))?\]/
2938
  },
2939
 
2940
  // for Selector.match and Element#match
2941
  assertions: {
2942
    tagName: function(element, matches) {
2943
      return matches[1].toUpperCase() == element.tagName.toUpperCase();
2944
    },
2945
 
2946
    className: function(element, matches) {
2947
      return Element.hasClassName(element, matches[1]);
2948
    },
2949
 
2950
    id: function(element, matches) {
2951
      return element.id === matches[1];
2952
    },
2953
 
2954
    attrPresence: function(element, matches) {
2955
      return Element.hasAttribute(element, matches[1]);
2956
    },
2957
 
2958
    attr: function(element, matches) {
2959
      var nodeValue = Element.readAttribute(element, matches[1]);
2960
      return Selector.operators[matches[2]](nodeValue, matches[3]);
2961
    }
2962
  },
2963
 
2964
  handlers: {
2965
    // UTILITY FUNCTIONS
2966
    // joins two collections
2967
    concat: function(a, b) {
2968
      for (var i = 0, node; node = b[i]; i++)
2969
        a.push(node);
2970
      return a;
2971
    },
2972
 
2973
    // marks an array of nodes for counting
2974
    mark: function(nodes) {
2975
      for (var i = 0, node; node = nodes[i]; i++)
2976
        node._counted = true;
2977
      return nodes;
2978
    },
2979
 
2980
    unmark: function(nodes) {
2981
      for (var i = 0, node; node = nodes[i]; i++)
2982
        node._counted = undefined;
2983
      return nodes;
2984
    },
2985
 
2986
    // mark each child node with its position (for nth calls)
2987
    // "ofType" flag indicates whether we're indexing for nth-of-type
2988
    // rather than nth-child
2989
    index: function(parentNode, reverse, ofType) {
2990
      parentNode._counted = true;
2991
      if (reverse) {
2992
        for (var nodes = parentNode.childNodes, i = nodes.length - 1, j = 1; i >= 0; i--) {
2993
          var node = nodes[i];
2994
          if (node.nodeType == 1 && (!ofType || node._counted)) node.nodeIndex = j++;
2995
        }
2996
      } else {
2997
        for (var i = 0, j = 1, nodes = parentNode.childNodes; node = nodes[i]; i++)
2998
          if (node.nodeType == 1 && (!ofType || node._counted)) node.nodeIndex = j++;
2999
      }
3000
    },
3001
 
3002
    // filters out duplicates and extends all nodes
3003
    unique: function(nodes) {
3004
      if (nodes.length == 0) return nodes;
3005
      var results = [], n;
3006
      for (var i = 0, l = nodes.length; i < l; i++)
3007
        if (!(n = nodes[i])._counted) {
3008
          n._counted = true;
3009
          results.push(Element.extend(n));
3010
        }
3011
      return Selector.handlers.unmark(results);
3012
    },
3013
 
3014
    // COMBINATOR FUNCTIONS
3015
    descendant: function(nodes) {
3016
      var h = Selector.handlers;
3017
      for (var i = 0, results = [], node; node = nodes[i]; i++)
3018
        h.concat(results, node.getElementsByTagName('*'));
3019
      return results;
3020
    },
3021
 
3022
    child: function(nodes) {
3023
      var h = Selector.handlers;
3024
      for (var i = 0, results = [], node; node = nodes[i]; i++) {
3025
        for (var j = 0, child; child = node.childNodes[j]; j++)
3026
          if (child.nodeType == 1 && child.tagName != '!') results.push(child);
3027
      }
3028
      return results;
3029
    },
3030
 
3031
    adjacent: function(nodes) {
3032
      for (var i = 0, results = [], node; node = nodes[i]; i++) {
3033
        var next = this.nextElementSibling(node);
3034
        if (next) results.push(next);
3035
      }
3036
      return results;
3037
    },
3038
 
3039
    laterSibling: function(nodes) {
3040
      var h = Selector.handlers;
3041
      for (var i = 0, results = [], node; node = nodes[i]; i++)
3042
        h.concat(results, Element.nextSiblings(node));
3043
      return results;
3044
    },
3045
 
3046
    nextElementSibling: function(node) {
3047
      while (node = node.nextSibling)
3048
	      if (node.nodeType == 1) return node;
3049
      return null;
3050
    },
3051
 
3052
    previousElementSibling: function(node) {
3053
      while (node = node.previousSibling)
3054
        if (node.nodeType == 1) return node;
3055
      return null;
3056
    },
3057
 
3058
    // TOKEN FUNCTIONS
3059
    tagName: function(nodes, root, tagName, combinator) {
3060
      var uTagName = tagName.toUpperCase();
3061
      var results = [], h = Selector.handlers;
3062
      if (nodes) {
3063
        if (combinator) {
3064
          // fastlane for ordinary descendant combinators
3065
          if (combinator == "descendant") {
3066
            for (var i = 0, node; node = nodes[i]; i++)
3067
              h.concat(results, node.getElementsByTagName(tagName));
3068
            return results;
3069
          } else nodes = this[combinator](nodes);
3070
          if (tagName == "*") return nodes;
3071
        }
3072
        for (var i = 0, node; node = nodes[i]; i++)
3073
          if (node.tagName.toUpperCase() === uTagName) results.push(node);
3074
        return results;
3075
      } else return root.getElementsByTagName(tagName);
3076
    },
3077
 
3078
    id: function(nodes, root, id, combinator) {
3079
      var targetNode = $(id), h = Selector.handlers;
3080
      if (!targetNode) return [];
3081
      if (!nodes && root == document) return [targetNode];
3082
      if (nodes) {
3083
        if (combinator) {
3084
          if (combinator == 'child') {
3085
            for (var i = 0, node; node = nodes[i]; i++)
3086
              if (targetNode.parentNode == node) return [targetNode];
3087
          } else if (combinator == 'descendant') {
3088
            for (var i = 0, node; node = nodes[i]; i++)
3089
              if (Element.descendantOf(targetNode, node)) return [targetNode];
3090
          } else if (combinator == 'adjacent') {
3091
            for (var i = 0, node; node = nodes[i]; i++)
3092
              if (Selector.handlers.previousElementSibling(targetNode) == node)
3093
                return [targetNode];
3094
          } else nodes = h[combinator](nodes);
3095
        }
3096
        for (var i = 0, node; node = nodes[i]; i++)
3097
          if (node == targetNode) return [targetNode];
3098
        return [];
3099
      }
3100
      return (targetNode && Element.descendantOf(targetNode, root)) ? [targetNode] : [];
3101
    },
3102
 
3103
    className: function(nodes, root, className, combinator) {
3104
      if (nodes && combinator) nodes = this[combinator](nodes);
3105
      return Selector.handlers.byClassName(nodes, root, className);
3106
    },
3107
 
3108
    byClassName: function(nodes, root, className) {
3109
      if (!nodes) nodes = Selector.handlers.descendant([root]);
3110
      var needle = ' ' + className + ' ';
3111
      for (var i = 0, results = [], node, nodeClassName; node = nodes[i]; i++) {
3112
        nodeClassName = node.className;
3113
        if (nodeClassName.length == 0) continue;
3114
        if (nodeClassName == className || (' ' + nodeClassName + ' ').include(needle))
3115
          results.push(node);
3116
      }
3117
      return results;
3118
    },
3119
 
3120
    attrPresence: function(nodes, root, attr) {
3121
      if (!nodes) nodes = root.getElementsByTagName("*");
3122
      var results = [];
3123
      for (var i = 0, node; node = nodes[i]; i++)
3124
        if (Element.hasAttribute(node, attr)) results.push(node);
3125
      return results;
3126
    },
3127
 
3128
    attr: function(nodes, root, attr, value, operator) {
3129
      if (!nodes) nodes = root.getElementsByTagName("*");
3130
      var handler = Selector.operators[operator], results = [];
3131
      for (var i = 0, node; node = nodes[i]; i++) {
3132
        var nodeValue = Element.readAttribute(node, attr);
3133
        if (nodeValue === null) continue;
3134
        if (handler(nodeValue, value)) results.push(node);
3135
      }
3136
      return results;
3137
    },
3138
 
3139
    pseudo: function(nodes, name, value, root, combinator) {
3140
      if (nodes && combinator) nodes = this[combinator](nodes);
3141
      if (!nodes) nodes = root.getElementsByTagName("*");
3142
      return Selector.pseudos[name](nodes, value, root);
3143
    }
3144
  },
3145
 
3146
  pseudos: {
3147
    'first-child': function(nodes, value, root) {
3148
      for (var i = 0, results = [], node; node = nodes[i]; i++) {
3149
        if (Selector.handlers.previousElementSibling(node)) continue;
3150
          results.push(node);
3151
      }
3152
      return results;
3153
    },
3154
    'last-child': function(nodes, value, root) {
3155
      for (var i = 0, results = [], node; node = nodes[i]; i++) {
3156
        if (Selector.handlers.nextElementSibling(node)) continue;
3157
          results.push(node);
3158
      }
3159
      return results;
3160
    },
3161
    'only-child': function(nodes, value, root) {
3162
      var h = Selector.handlers;
3163
      for (var i = 0, results = [], node; node = nodes[i]; i++)
3164
        if (!h.previousElementSibling(node) && !h.nextElementSibling(node))
3165
          results.push(node);
3166
      return results;
3167
    },
3168
    'nth-child':        function(nodes, formula, root) {
3169
      return Selector.pseudos.nth(nodes, formula, root);
3170
    },
3171
    'nth-last-child':   function(nodes, formula, root) {
3172
      return Selector.pseudos.nth(nodes, formula, root, true);
3173
    },
3174
    'nth-of-type':      function(nodes, formula, root) {
3175
      return Selector.pseudos.nth(nodes, formula, root, false, true);
3176
    },
3177
    'nth-last-of-type': function(nodes, formula, root) {
3178
      return Selector.pseudos.nth(nodes, formula, root, true, true);
3179
    },
3180
    'first-of-type':    function(nodes, formula, root) {
3181
      return Selector.pseudos.nth(nodes, "1", root, false, true);
3182
    },
3183
    'last-of-type':     function(nodes, formula, root) {
3184
      return Selector.pseudos.nth(nodes, "1", root, true, true);
3185
    },
3186
    'only-of-type':     function(nodes, formula, root) {
3187
      var p = Selector.pseudos;
3188
      return p['last-of-type'](p['first-of-type'](nodes, formula, root), formula, root);
3189
    },
3190
 
3191
    // handles the an+b logic
3192
    getIndices: function(a, b, total) {
3193
      if (a == 0) return b > 0 ? [b] : [];
3194
      return $R(1, total).inject([], function(memo, i) {
3195
        if (0 == (i - b) % a && (i - b) / a >= 0) memo.push(i);
3196
        return memo;
3197
      });
3198
    },
3199
 
3200
    // handles nth(-last)-child, nth(-last)-of-type, and (first|last)-of-type
3201
    nth: function(nodes, formula, root, reverse, ofType) {
3202
      if (nodes.length == 0) return [];
3203
      if (formula == 'even') formula = '2n+0';
3204
      if (formula == 'odd')  formula = '2n+1';
3205
      var h = Selector.handlers, results = [], indexed = [], m;
3206
      h.mark(nodes);
3207
      for (var i = 0, node; node = nodes[i]; i++) {
3208
        if (!node.parentNode._counted) {
3209
          h.index(node.parentNode, reverse, ofType);
3210
          indexed.push(node.parentNode);
3211
        }
3212
      }
3213
      if (formula.match(/^\d+$/)) { // just a number
3214
        formula = Number(formula);
3215
        for (var i = 0, node; node = nodes[i]; i++)
3216
          if (node.nodeIndex == formula) results.push(node);
3217
      } else if (m = formula.match(/^(-?\d*)?n(([+-])(\d+))?/)) { // an+b
3218
        if (m[1] == "-") m[1] = -1;
3219
        var a = m[1] ? Number(m[1]) : 1;
3220
        var b = m[2] ? Number(m[2]) : 0;
3221
        var indices = Selector.pseudos.getIndices(a, b, nodes.length);
3222
        for (var i = 0, node, l = indices.length; node = nodes[i]; i++) {
3223
          for (var j = 0; j < l; j++)
3224
            if (node.nodeIndex == indices[j]) results.push(node);
3225
        }
3226
      }
3227
      h.unmark(nodes);
3228
      h.unmark(indexed);
3229
      return results;
3230
    },
3231
 
3232
    'empty': function(nodes, value, root) {
3233
      for (var i = 0, results = [], node; node = nodes[i]; i++) {
3234
        // IE treats comments as element nodes
3235
        if (node.tagName == '!' || (node.firstChild && !node.innerHTML.match(/^\s*$/))) continue;
3236
        results.push(node);
3237
      }
3238
      return results;
3239
    },
3240
 
3241
    'not': function(nodes, selector, root) {
3242
      var h = Selector.handlers, selectorType, m;
3243
      var exclusions = new Selector(selector).findElements(root);
3244
      h.mark(exclusions);
3245
      for (var i = 0, results = [], node; node = nodes[i]; i++)
3246
        if (!node._counted) results.push(node);
3247
      h.unmark(exclusions);
3248
      return results;
3249
    },
3250
 
3251
    'enabled': function(nodes, value, root) {
3252
      for (var i = 0, results = [], node; node = nodes[i]; i++)
3253
        if (!node.disabled) results.push(node);
3254
      return results;
3255
    },
3256
 
3257
    'disabled': function(nodes, value, root) {
3258
      for (var i = 0, results = [], node; node = nodes[i]; i++)
3259
        if (node.disabled) results.push(node);
3260
      return results;
3261
    },
3262
 
3263
    'checked': function(nodes, value, root) {
3264
      for (var i = 0, results = [], node; node = nodes[i]; i++)
3265
        if (node.checked) results.push(node);
3266
      return results;
3267
    }
3268
  },
3269
 
3270
  operators: {
3271
    '=':  function(nv, v) { return nv == v; },
3272
    '!=': function(nv, v) { return nv != v; },
3273
    '^=': function(nv, v) { return nv.startsWith(v); },
3274
    '$=': function(nv, v) { return nv.endsWith(v); },
3275
    '*=': function(nv, v) { return nv.include(v); },
3276
    '~=': function(nv, v) { return (' ' + nv + ' ').include(' ' + v + ' '); },
3277
    '|=': function(nv, v) { return ('-' + nv.toUpperCase() + '-').include('-' + v.toUpperCase() + '-'); }
3278
  },
3279
 
3280
  matchElements: function(elements, expression) {
3281
    var matches = new Selector(expression).findElements(), h = Selector.handlers;
3282
    h.mark(matches);
3283
    for (var i = 0, results = [], element; element = elements[i]; i++)
3284
      if (element._counted) results.push(element);
3285
    h.unmark(matches);
3286
    return results;
3287
  },
3288
 
3289
  findElement: function(elements, expression, index) {
3290
    if (Object.isNumber(expression)) {
3291
      index = expression; expression = false;
3292
    }
3293
    return Selector.matchElements(elements, expression || '*')[index || 0];
3294
  },
3295
 
3296
  findChildElements: function(element, expressions) {
3297
    var exprs = expressions.join(',');
3298
    expressions = [];
3299
    exprs.scan(/(([\w#:.~>+()\s-]+|\*|\[.*?\])+)\s*(,|$)/, function(m) {
3300
      expressions.push(m[1].strip());
3301
    });
3302
    var results = [], h = Selector.handlers;
3303
    for (var i = 0, l = expressions.length, selector; i < l; i++) {
3304
      selector = new Selector(expressions[i].strip());
3305
      h.concat(results, selector.findElements(element));
3306
    }
3307
    return (l > 1) ? h.unique(results) : results;
3308
  }
3309
});
3310
 
3311
if (Prototype.Browser.IE) {
3312
  // IE returns comment nodes on getElementsByTagName("*").
3313
  // Filter them out.
3314
  Selector.handlers.concat = function(a, b) {
3315
    for (var i = 0, node; node = b[i]; i++)
3316
      if (node.tagName !== "!") a.push(node);
3317
    return a;
3318
  };
3319
}
3320
 
3321
function $$() {
3322
  return Selector.findChildElements(document, $A(arguments));
3323
}
3324
var Form = {
3325
  reset: function(form) {
3326
    $(form).reset();
3327
    return form;
3328
  },
3329
 
3330
  serializeElements: function(elements, options) {
3331
    if (typeof options != 'object') options = { hash: !!options };
3332
    else if (Object.isUndefined(options.hash)) options.hash = true;
3333
    var key, value, submitted = false, submit = options.submit;
3334
 
3335
    var data = elements.inject({ }, function(result, element) {
3336
      if (!element.disabled && element.name) {
3337
        key = element.name; value = $(element).getValue();
3338
        if (value != null && (element.type != 'submit' || (!submitted &&
3339
            submit !== false && (!submit || key == submit) && (submitted = true)))) {
3340
          if (key in result) {
3341
            // a key is already present; construct an array of values
3342
            if (!Object.isArray(result[key])) result[key] = [result[key]];
3343
            result[key].push(value);
3344
          }
3345
          else result[key] = value;
3346
        }
3347
      }
3348
      return result;
3349
    });
3350
 
3351
    return options.hash ? data : Object.toQueryString(data);
3352
  }
3353
};
3354
 
3355
Form.Methods = {
3356
  serialize: function(form, options) {
3357
    return Form.serializeElements(Form.getElements(form), options);
3358
  },
3359
 
3360
  getElements: function(form) {
3361
    return $A($(form).getElementsByTagName('*')).inject([],
3362
      function(elements, child) {
3363
        if (Form.Element.Serializers[child.tagName.toLowerCase()])
3364
          elements.push(Element.extend(child));
3365
        return elements;
3366
      }
3367
    );
3368
  },
3369
 
3370
  getInputs: function(form, typeName, name) {
3371
    form = $(form);
3372
    var inputs = form.getElementsByTagName('input');
3373
 
3374
    if (!typeName && !name) return $A(inputs).map(Element.extend);
3375
 
3376
    for (var i = 0, matchingInputs = [], length = inputs.length; i < length; i++) {
3377
      var input = inputs[i];
3378
      if ((typeName && input.type != typeName) || (name && input.name != name))
3379
        continue;
3380
      matchingInputs.push(Element.extend(input));
3381
    }
3382
 
3383
    return matchingInputs;
3384
  },
3385
 
3386
  disable: function(form) {
3387
    form = $(form);
3388
    Form.getElements(form).invoke('disable');
3389
    return form;
3390
  },
3391
 
3392
  enable: function(form) {
3393
    form = $(form);
3394
    Form.getElements(form).invoke('enable');
3395
    return form;
3396
  },
3397
 
3398
  findFirstElement: function(form) {
3399
    var elements = $(form).getElements().findAll(function(element) {
3400
      return 'hidden' != element.type && !element.disabled;
3401
    });
3402
    var firstByIndex = elements.findAll(function(element) {
3403
      return element.hasAttribute('tabIndex') && element.tabIndex >= 0;
3404
    }).sortBy(function(element) { return element.tabIndex }).first();
3405
 
3406
    return firstByIndex ? firstByIndex : elements.find(function(element) {
3407
      return ['input', 'select', 'textarea'].include(element.tagName.toLowerCase());
3408
    });
3409
  },
3410
 
3411
  focusFirstElement: function(form) {
3412
    form = $(form);
3413
    form.findFirstElement().activate();
3414
    return form;
3415
  },
3416
 
3417
  request: function(form, options) {
3418
    form = $(form), options = Object.clone(options || { });
3419
 
3420
    var params = options.parameters, action = form.readAttribute('action') || '';
3421
    if (action.blank()) action = window.location.href;
3422
    options.parameters = form.serialize(true);
3423
 
3424
    if (params) {
3425
      if (Object.isString(params)) params = params.toQueryParams();
3426
      Object.extend(options.parameters, params);
3427
    }
3428
 
3429
    if (form.hasAttribute('method') && !options.method)
3430
      options.method = form.method;
3431
 
3432
    return new Ajax.Request(action, options);
3433
  }
3434
};
3435
 
3436
/*--------------------------------------------------------------------------*/
3437
 
3438
Form.Element = {
3439
  focus: function(element) {
3440
    $(element).focus();
3441
    return element;
3442
  },
3443
 
3444
  select: function(element) {
3445
    $(element).select();
3446
    return element;
3447
  }
3448
};
3449
 
3450
Form.Element.Methods = {
3451
  serialize: function(element) {
3452
    element = $(element);
3453
    if (!element.disabled && element.name) {
3454
      var value = element.getValue();
3455
      if (value != undefined) {
3456
        var pair = { };
3457
        pair[element.name] = value;
3458
        return Object.toQueryString(pair);
3459
      }
3460
    }
3461
    return '';
3462
  },
3463
 
3464
  getValue: function(element) {
3465
    element = $(element);
3466
    var method = element.tagName.toLowerCase();
3467
    return Form.Element.Serializers[method](element);
3468
  },
3469
 
3470
  setValue: function(element, value) {
3471
    element = $(element);
3472
    var method = element.tagName.toLowerCase();
3473
    Form.Element.Serializers[method](element, value);
3474
    return element;
3475
  },
3476
 
3477
  clear: function(element) {
3478
    $(element).value = '';
3479
    return element;
3480
  },
3481
 
3482
  present: function(element) {
3483
    return $(element).value != '';
3484
  },
3485
 
3486
  activate: function(element) {
3487
    element = $(element);
3488
    try {
3489
      element.focus();
3490
      if (element.select && (element.tagName.toLowerCase() != 'input' ||
3491
          !['button', 'reset', 'submit'].include(element.type)))
3492
        element.select();
3493
    } catch (e) { }
3494
    return element;
3495
  },
3496
 
3497
  disable: function(element) {
3498
    element = $(element);
3499
    element.blur();
3500
    element.disabled = true;
3501
    return element;
3502
  },
3503
 
3504
  enable: function(element) {
3505
    element = $(element);
3506
    element.disabled = false;
3507
    return element;
3508
  }
3509
};
3510
 
3511
/*--------------------------------------------------------------------------*/
3512
 
3513
var Field = Form.Element;
3514
var $F = Form.Element.Methods.getValue;
3515
 
3516
/*--------------------------------------------------------------------------*/
3517
 
3518
Form.Element.Serializers = {
3519
  input: function(element, value) {
3520
    switch (element.type.toLowerCase()) {
3521
      case 'checkbox':
3522
      case 'radio':
3523
        return Form.Element.Serializers.inputSelector(element, value);
3524
      default:
3525
        return Form.Element.Serializers.textarea(element, value);
3526
    }
3527
  },
3528
 
3529
  inputSelector: function(element, value) {
3530
    if (Object.isUndefined(value)) return element.checked ? element.value : null;
3531
    else element.checked = !!value;
3532
  },
3533
 
3534
  textarea: function(element, value) {
3535
    if (Object.isUndefined(value)) return element.value;
3536
    else element.value = value;
3537
  },
3538
 
3539
  select: function(element, index) {
3540
    if (Object.isUndefined(index))
3541
      return this[element.type == 'select-one' ?
3542
        'selectOne' : 'selectMany'](element);
3543
    else {
3544
      var opt, value, single = !Object.isArray(index);
3545
      for (var i = 0, length = element.length; i < length; i++) {
3546
        opt = element.options[i];
3547
        value = this.optionValue(opt);
3548
        if (single) {
3549
          if (value == index) {
3550
            opt.selected = true;
3551
            return;
3552
          }
3553
        }
3554
        else opt.selected = index.include(value);
3555
      }
3556
    }
3557
  },
3558
 
3559
  selectOne: function(element) {
3560
    var index = element.selectedIndex;
3561
    return index >= 0 ? this.optionValue(element.options[index]) : null;
3562
  },
3563
 
3564
  selectMany: function(element) {
3565
    var values, length = element.length;
3566
    if (!length) return null;
3567
 
3568
    for (var i = 0, values = []; i < length; i++) {
3569
      var opt = element.options[i];
3570
      if (opt.selected) values.push(this.optionValue(opt));
3571
    }
3572
    return values;
3573
  },
3574
 
3575
  optionValue: function(opt) {
3576
    // extend element because hasAttribute may not be native
3577
    return Element.extend(opt).hasAttribute('value') ? opt.value : opt.text;
3578
  }
3579
};
3580
 
3581
/*--------------------------------------------------------------------------*/
3582
 
3583
Abstract.TimedObserver = Class.create(PeriodicalExecuter, {
3584
  initialize: function($super, element, frequency, callback) {
3585
    $super(callback, frequency);
3586
    this.element   = $(element);
3587
    this.lastValue = this.getValue();
3588
  },
3589
 
3590
  execute: function() {
3591
    var value = this.getValue();
3592
    if (Object.isString(this.lastValue) && Object.isString(value) ?
3593
        this.lastValue != value : String(this.lastValue) != String(value)) {
3594
      this.callback(this.element, value);
3595
      this.lastValue = value;
3596
    }
3597
  }
3598
});
3599
 
3600
Form.Element.Observer = Class.create(Abstract.TimedObserver, {
3601
  getValue: function() {
3602
    return Form.Element.getValue(this.element);
3603
  }
3604
});
3605
 
3606
Form.Observer = Class.create(Abstract.TimedObserver, {
3607
  getValue: function() {
3608
    return Form.serialize(this.element);
3609
  }
3610
});
3611
 
3612
/*--------------------------------------------------------------------------*/
3613
 
3614
Abstract.EventObserver = Class.create({
3615
  initialize: function(element, callback) {
3616
    this.element  = $(element);
3617
    this.callback = callback;
3618
 
3619
    this.lastValue = this.getValue();
3620
    if (this.element.tagName.toLowerCase() == 'form')
3621
      this.registerFormCallbacks();
3622
    else
3623
      this.registerCallback(this.element);
3624
  },
3625
 
3626
  onElementEvent: function() {
3627
    var value = this.getValue();
3628
    if (this.lastValue != value) {
3629
      this.callback(this.element, value);
3630
      this.lastValue = value;
3631
    }
3632
  },
3633
 
3634
  registerFormCallbacks: function() {
3635
    Form.getElements(this.element).each(this.registerCallback, this);
3636
  },
3637
 
3638
  registerCallback: function(element) {
3639
    if (element.type) {
3640
      switch (element.type.toLowerCase()) {
3641
        case 'checkbox':
3642
        case 'radio':
3643
          Event.observe(element, 'click', this.onElementEvent.bind(this));
3644
          break;
3645
        default:
3646
          Event.observe(element, 'change', this.onElementEvent.bind(this));
3647
          break;
3648
      }
3649
    }
3650
  }
3651
});
3652
 
3653
Form.Element.EventObserver = Class.create(Abstract.EventObserver, {
3654
  getValue: function() {
3655
    return Form.Element.getValue(this.element);
3656
  }
3657
});
3658
 
3659
Form.EventObserver = Class.create(Abstract.EventObserver, {
3660
  getValue: function() {
3661
    return Form.serialize(this.element);
3662
  }
3663
});
3664
if (!window.Event) var Event = { };
3665
 
3666
Object.extend(Event, {
3667
  KEY_BACKSPACE: 8,
3668
  KEY_TAB:       9,
3669
  KEY_RETURN:   13,
3670
  KEY_ESC:      27,
3671
  KEY_LEFT:     37,
3672
  KEY_UP:       38,
3673
  KEY_RIGHT:    39,
3674
  KEY_DOWN:     40,
3675
  KEY_DELETE:   46,
3676
  KEY_HOME:     36,
3677
  KEY_END:      35,
3678
  KEY_PAGEUP:   33,
3679
  KEY_PAGEDOWN: 34,
3680
  KEY_INSERT:   45,
3681
 
3682
  cache: { },
3683
 
3684
  relatedTarget: function(event) {
3685
    var element;
3686
    switch(event.type) {
3687
      case 'mouseover': element = event.fromElement; break;
3688
      case 'mouseout':  element = event.toElement;   break;
3689
      default: return null;
3690
    }
3691
    return Element.extend(element);
3692
  }
3693
});
3694
 
3695
Event.Methods = (function() {
3696
  var isButton;
3697
 
3698
  if (Prototype.Browser.IE) {
3699
    var buttonMap = { 0: 1, 1: 4, 2: 2 };
3700
    isButton = function(event, code) {
3701
      return event.button == buttonMap[code];
3702
    };
3703
 
3704
  } else if (Prototype.Browser.WebKit) {
3705
    isButton = function(event, code) {
3706
      switch (code) {
3707
        case 0: return event.which == 1 && !event.metaKey;
3708
        case 1: return event.which == 1 && event.metaKey;
3709
        default: return false;
3710
      }
3711
    };
3712
 
3713
  } else {
3714
    isButton = function(event, code) {
3715
      return event.which ? (event.which === code + 1) : (event.button === code);
3716
    };
3717
  }
3718
 
3719
  return {
3720
    isLeftClick:   function(event) { return isButton(event, 0) },
3721
    isMiddleClick: function(event) { return isButton(event, 1) },
3722
    isRightClick:  function(event) { return isButton(event, 2) },
3723
 
3724
    element: function(event) {
3725
      var node = Event.extend(event).target;
3726
      return Element.extend(node.nodeType == Node.TEXT_NODE ? node.parentNode : node);
3727
    },
3728
 
3729
    findElement: function(event, expression) {
3730
      var element = Event.element(event);
3731
      if (!expression) return element;
3732
      var elements = [element].concat(element.ancestors());
3733
      return Selector.findElement(elements, expression, 0);
3734
    },
3735
 
3736
    pointer: function(event) {
3737
      return {
3738
        x: event.pageX || (event.clientX +
3739
          (document.documentElement.scrollLeft || document.body.scrollLeft)),
3740
        y: event.pageY || (event.clientY +
3741
          (document.documentElement.scrollTop || document.body.scrollTop))
3742
      };
3743
    },
3744
 
3745
    pointerX: function(event) { return Event.pointer(event).x },
3746
    pointerY: function(event) { return Event.pointer(event).y },
3747
 
3748
    stop: function(event) {
3749
      Event.extend(event);
3750
      event.preventDefault();
3751
      event.stopPropagation();
3752
      event.stopped = true;
3753
    }
3754
  };
3755
})();
3756
 
3757
Event.extend = (function() {
3758
  var methods = Object.keys(Event.Methods).inject({ }, function(m, name) {
3759
    m[name] = Event.Methods[name].methodize();
3760
    return m;
3761
  });
3762
 
3763
  if (Prototype.Browser.IE) {
3764
    Object.extend(methods, {
3765
      stopPropagation: function() { this.cancelBubble = true },
3766
      preventDefault:  function() { this.returnValue = false },
3767
      inspect: function() { return "[object Event]" }
3768
    });
3769
 
3770
    return function(event) {
3771
      if (!event) return false;
3772
      if (event._extendedByPrototype) return event;
3773
 
3774
      event._extendedByPrototype = Prototype.emptyFunction;
3775
      var pointer = Event.pointer(event);
3776
      Object.extend(event, {
3777
        target: event.srcElement,
3778
        relatedTarget: Event.relatedTarget(event),
3779
        pageX:  pointer.x,
3780
        pageY:  pointer.y
3781
      });
3782
      return Object.extend(event, methods);
3783
    };
3784
 
3785
  } else {
3786
    Event.prototype = Event.prototype || document.createEvent("HTMLEvents").__proto__;
3787
    Object.extend(Event.prototype, methods);
3788
    return Prototype.K;
3789
  }
3790
})();
3791
 
3792
Object.extend(Event, (function() {
3793
  var cache = Event.cache;
3794
 
3795
  function getEventID(element) {
3796
    if (element._eventID) return element._eventID;
3797
    arguments.callee.id = arguments.callee.id || 1;
3798
    return element._eventID = ++arguments.callee.id;
3799
  }
3800
 
3801
  function getDOMEventName(eventName) {
3802
    if (eventName && eventName.include(':')) return "dataavailable";
3803
    return eventName;
3804
  }
3805
 
3806
  function getCacheForID(id) {
3807
    return cache[id] = cache[id] || { };
3808
  }
3809
 
3810
  function getWrappersForEventName(id, eventName) {
3811
    var c = getCacheForID(id);
3812
    return c[eventName] = c[eventName] || [];
3813
  }
3814
 
3815
  function createWrapper(element, eventName, handler) {
3816
    var id = getEventID(element);
3817
    var c = getWrappersForEventName(id, eventName);
3818
    if (c.pluck("handler").include(handler)) return false;
3819
 
3820
    var wrapper = function(event) {
3821
      if (!Event || !Event.extend ||
3822
        (event.eventName && event.eventName != eventName))
3823
          return false;
3824
 
3825
      Event.extend(event);
3826
      handler.call(element, event);
3827
    };
3828
 
3829
    wrapper.handler = handler;
3830
    c.push(wrapper);
3831
    return wrapper;
3832
  }
3833
 
3834
  function findWrapper(id, eventName, handler) {
3835
    var c = getWrappersForEventName(id, eventName);
3836
    return c.find(function(wrapper) { return wrapper.handler == handler });
3837
  }
3838
 
3839
  function destroyWrapper(id, eventName, handler) {
3840
    var c = getCacheForID(id);
3841
    if (!c[eventName]) return false;
3842
    c[eventName] = c[eventName].without(findWrapper(id, eventName, handler));
3843
  }
3844
 
3845
  function destroyCache() {
3846
    for (var id in cache)
3847
      for (var eventName in cache[id])
3848
        cache[id][eventName] = null;
3849
  }
3850
 
3851
  if (window.attachEvent) {
3852
    window.attachEvent("onunload", destroyCache);
3853
  }
3854
 
3855
  return {
3856
    observe: function(element, eventName, handler) {
3857
      element = $(element);
3858
      var name = getDOMEventName(eventName);
3859
 
3860
      var wrapper = createWrapper(element, eventName, handler);
3861
      if (!wrapper) return element;
3862
 
3863
      if (element.addEventListener) {
3864
        element.addEventListener(name, wrapper, false);
3865
      } else {
3866
        element.attachEvent("on" + name, wrapper);
3867
      }
3868
 
3869
      return element;
3870
    },
3871
 
3872
    stopObserving: function(element, eventName, handler) {
3873
      element = $(element);
3874
      var id = getEventID(element), name = getDOMEventName(eventName);
3875
 
3876
      if (!handler && eventName) {
3877
        getWrappersForEventName(id, eventName).each(function(wrapper) {
3878
          element.stopObserving(eventName, wrapper.handler);
3879
        });
3880
        return element;
3881
 
3882
      } else if (!eventName) {
3883
        Object.keys(getCacheForID(id)).each(function(eventName) {
3884
          element.stopObserving(eventName);
3885
        });
3886
        return element;
3887
      }
3888
 
3889
      var wrapper = findWrapper(id, eventName, handler);
3890
      if (!wrapper) return element;
3891
 
3892
      if (element.removeEventListener) {
3893
        element.removeEventListener(name, wrapper, false);
3894
      } else {
3895
        element.detachEvent("on" + name, wrapper);
3896
      }
3897
 
3898
      destroyWrapper(id, eventName, handler);
3899
 
3900
      return element;
3901
    },
3902
 
3903
    fire: function(element, eventName, memo) {
3904
      element = $(element);
3905
      if (element == document && document.createEvent && !element.dispatchEvent)
3906
        element = document.documentElement;
3907
 
3908
      var event;
3909
      if (document.createEvent) {
3910
        event = document.createEvent("HTMLEvents");
3911
        event.initEvent("dataavailable", true, true);
3912
      } else {
3913
        event = document.createEventObject();
3914
        event.eventType = "ondataavailable";
3915
      }
3916
 
3917
      event.eventName = eventName;
3918
      event.memo = memo || { };
3919
 
3920
      if (document.createEvent) {
3921
        element.dispatchEvent(event);
3922
      } else {
3923
        element.fireEvent(event.eventType, event);
3924
      }
3925
 
3926
      return Event.extend(event);
3927
    }
3928
  };
3929
})());
3930
 
3931
Object.extend(Event, Event.Methods);
3932
 
3933
Element.addMethods({
3934
  fire:          Event.fire,
3935
  observe:       Event.observe,
3936
  stopObserving: Event.stopObserving
3937
});
3938
 
3939
Object.extend(document, {
3940
  fire:          Element.Methods.fire.methodize(),
3941
  observe:       Element.Methods.observe.methodize(),
3942
  stopObserving: Element.Methods.stopObserving.methodize(),
3943
  loaded:        false
3944
});
3945
 
3946
(function() {
3947
  /* Support for the DOMContentLoaded event is based on work by Dan Webb,
3948
     Matthias Miller, Dean Edwards and John Resig. */
3949
 
3950
  var timer;
3951
 
3952
  function fireContentLoadedEvent() {
3953
    if (document.loaded) return;
3954
    if (timer) window.clearInterval(timer);
3955
    document.fire("dom:loaded");
3956
    document.loaded = true;
3957
  }
3958
 
3959
  if (document.addEventListener) {
3960
    if (Prototype.Browser.WebKit) {
3961
      timer = window.setInterval(function() {
3962
        if (/loaded|complete/.test(document.readyState))
3963
          fireContentLoadedEvent();
3964
      }, 0);
3965
 
3966
      Event.observe(window, "load", fireContentLoadedEvent);
3967
 
3968
    } else {
3969
      document.addEventListener("DOMContentLoaded",
3970
        fireContentLoadedEvent, false);
3971
    }
3972
 
3973
  } else {
3974
    document.write("<script id=__onDOMContentLoaded defer src=//:><\/script>");
3975
    $("__onDOMContentLoaded").onreadystatechange = function() {
3976
      if (this.readyState == "complete") {
3977
        this.onreadystatechange = null;
3978
        fireContentLoadedEvent();
3979
      }
3980
    };
3981
  }
3982
})();
3983
/*------------------------------- DEPRECATED -------------------------------*/
3984
 
3985
Hash.toQueryString = Object.toQueryString;
3986
 
3987
var Toggle = { display: Element.toggle };
3988
 
3989
Element.Methods.childOf = Element.Methods.descendantOf;
3990
 
3991
var Insertion = {
3992
  Before: function(element, content) {
3993
    return Element.insert(element, {before:content});
3994
  },
3995
 
3996
  Top: function(element, content) {
3997
    return Element.insert(element, {top:content});
3998
  },
3999
 
4000
  Bottom: function(element, content) {
4001
    return Element.insert(element, {bottom:content});
4002
  },
4003
 
4004
  After: function(element, content) {
4005
    return Element.insert(element, {after:content});
4006
  }
4007
};
4008
 
4009
var $continue = new Error('"throw $continue" is deprecated, use "return" instead');
4010
 
4011
// This should be moved to script.aculo.us; notice the deprecated methods
4012
// further below, that map to the newer Element methods.
4013
var Position = {
4014
  // set to true if needed, warning: firefox performance problems
4015
  // NOT neeeded for page scrolling, only if draggable contained in
4016
  // scrollable elements
4017
  includeScrollOffsets: false,
4018
 
4019
  // must be called before calling withinIncludingScrolloffset, every time the
4020
  // page is scrolled
4021
  prepare: function() {
4022
    this.deltaX =  window.pageXOffset
4023
                || document.documentElement.scrollLeft
4024
                || document.body.scrollLeft
4025
                || 0;
4026
    this.deltaY =  window.pageYOffset
4027
                || document.documentElement.scrollTop
4028
                || document.body.scrollTop
4029
                || 0;
4030
  },
4031
 
4032
  // caches x/y coordinate pair to use with overlap
4033
  within: function(element, x, y) {
4034
    if (this.includeScrollOffsets)
4035
      return this.withinIncludingScrolloffsets(element, x, y);
4036
    this.xcomp = x;
4037
    this.ycomp = y;
4038
    this.offset = Element.cumulativeOffset(element);
4039
 
4040
    return (y >= this.offset[1] &&
4041
            y <  this.offset[1] + element.offsetHeight &&
4042
            x >= this.offset[0] &&
4043
            x <  this.offset[0] + element.offsetWidth);
4044
  },
4045
 
4046
  withinIncludingScrolloffsets: function(element, x, y) {
4047
    var offsetcache = Element.cumulativeScrollOffset(element);
4048
 
4049
    this.xcomp = x + offsetcache[0] - this.deltaX;
4050
    this.ycomp = y + offsetcache[1] - this.deltaY;
4051
    this.offset = Element.cumulativeOffset(element);
4052
 
4053
    return (this.ycomp >= this.offset[1] &&
4054
            this.ycomp <  this.offset[1] + element.offsetHeight &&
4055
            this.xcomp >= this.offset[0] &&
4056
            this.xcomp <  this.offset[0] + element.offsetWidth);
4057
  },
4058
 
4059
  // within must be called directly before
4060
  overlap: function(mode, element) {
4061
    if (!mode) return 0;
4062
    if (mode == 'vertical')
4063
      return ((this.offset[1] + element.offsetHeight) - this.ycomp) /
4064
        element.offsetHeight;
4065
    if (mode == 'horizontal')
4066
      return ((this.offset[0] + element.offsetWidth) - this.xcomp) /
4067
        element.offsetWidth;
4068
  },
4069
 
4070
  // Deprecation layer -- use newer Element methods now (1.5.2).
4071
 
4072
  cumulativeOffset: Element.Methods.cumulativeOffset,
4073
 
4074
  positionedOffset: Element.Methods.positionedOffset,
4075
 
4076
  absolutize: function(element) {
4077
    Position.prepare();
4078
    return Element.absolutize(element);
4079
  },
4080
 
4081
  relativize: function(element) {
4082
    Position.prepare();
4083
    return Element.relativize(element);
4084
  },
4085
 
4086
  realOffset: Element.Methods.cumulativeScrollOffset,
4087
 
4088
  offsetParent: Element.Methods.getOffsetParent,
4089
 
4090
  page: Element.Methods.viewportOffset,
4091
 
4092
  clone: function(source, target, options) {
4093
    options = options || { };
4094
    return Element.clonePosition(target, source, options);
4095
  }
4096
};
4097
 
4098
/*--------------------------------------------------------------------------*/
4099
 
4100
if (!document.getElementsByClassName) document.getElementsByClassName = function(instanceMethods){
4101
  function iter(name) {
4102
    return name.blank() ? null : "[contains(concat(' ', @class, ' '), ' " + name + " ')]";
4103
  }
4104
 
4105
  instanceMethods.getElementsByClassName = Prototype.BrowserFeatures.XPath ?
4106
  function(element, className) {
4107
    className = className.toString().strip();
4108
    var cond = /\s/.test(className) ? $w(className).map(iter).join('') : iter(className);
4109
    return cond ? document._getElementsByXPath('.//*' + cond, element) : [];
4110
  } : function(element, className) {
4111
    className = className.toString().strip();
4112
    var elements = [], classNames = (/\s/.test(className) ? $w(className) : null);
4113
    if (!classNames && !className) return elements;
4114
 
4115
    var nodes = $(element).getElementsByTagName('*');
4116
    className = ' ' + className + ' ';
4117
 
4118
    for (var i = 0, child, cn; child = nodes[i]; i++) {
4119
      if (child.className && (cn = ' ' + child.className + ' ') && (cn.include(className) ||
4120
          (classNames && classNames.all(function(name) {
4121
            return !name.toString().blank() && cn.include(' ' + name + ' ');
4122
          }))))
4123
        elements.push(Element.extend(child));
4124
    }
4125
    return elements;
4126
  };
4127
 
4128
  return function(className, parentElement) {
4129
    return $(parentElement || document.body).getElementsByClassName(className);
4130
  };
4131
}(Element.Methods);
4132
 
4133
/*--------------------------------------------------------------------------*/
4134
 
4135
Element.ClassNames = Class.create();
4136
Element.ClassNames.prototype = {
4137
  initialize: function(element) {
4138
    this.element = $(element);
4139
  },
4140
 
4141
  _each: function(iterator) {
4142
    this.element.className.split(/\s+/).select(function(name) {
4143
      return name.length > 0;
4144
    })._each(iterator);
4145
  },
4146
 
4147
  set: function(className) {
4148
    this.element.className = className;
4149
  },
4150
 
4151
  add: function(classNameToAdd) {
4152
    if (this.include(classNameToAdd)) return;
4153
    this.set($A(this).concat(classNameToAdd).join(' '));
4154
  },
4155
 
4156
  remove: function(classNameToRemove) {
4157
    if (!this.include(classNameToRemove)) return;
4158
    this.set($A(this).without(classNameToRemove).join(' '));
4159
  },
4160
 
4161
  toString: function() {
4162
    return $A(this).join(' ');
4163
  }
4164
};
4165
 
4166
Object.extend(Element.ClassNames.prototype, Enumerable);
4167
 
4168
/*--------------------------------------------------------------------------*/
4169
 
4170
Element.addMethods();