MonoRail/Castle.MonoRail.Framework/JSResources/Ajax.resx

   1 <?xml version="1.0" encoding="utf-8"?>
   2 <root>
   3   <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
   4     <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
   5     <xsd:element name="root" msdata:IsDataSet="true">
   6       <xsd:complexType>
   7         <xsd:choice maxOccurs="unbounded">
   8           <xsd:element name="metadata">
   9             <xsd:complexType>
  10               <xsd:sequence>
  11                 <xsd:element name="value" type="xsd:string" minOccurs="0" />
  12               </xsd:sequence>
  13               <xsd:attribute name="name" use="required" type="xsd:string" />
  14               <xsd:attribute name="type" type="xsd:string" />
  15               <xsd:attribute name="mimetype" type="xsd:string" />
  16               <xsd:attribute ref="xml:space" />
  17             </xsd:complexType>
  18           </xsd:element>
  19           <xsd:element name="assembly">
  20             <xsd:complexType>
  21               <xsd:attribute name="alias" type="xsd:string" />
  22               <xsd:attribute name="name" type="xsd:string" />
  23             </xsd:complexType>
  24           </xsd:element>
  25           <xsd:element name="data">
  26             <xsd:complexType>
  27               <xsd:sequence>
  28                 <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
  29                 <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
  30               </xsd:sequence>
  31               <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
  32               <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
  33               <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
  34               <xsd:attribute ref="xml:space" />
  35             </xsd:complexType>
  36           </xsd:element>
  37           <xsd:element name="resheader">
  38             <xsd:complexType>
  39               <xsd:sequence>
  40                 <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
  41               </xsd:sequence>
  42               <xsd:attribute name="name" type="xsd:string" use="required" />
  43             </xsd:complexType>
  44           </xsd:element>
  45         </xsd:choice>
  46       </xsd:complexType>
  47     </xsd:element>
  48   </xsd:schema>
  49   <resheader name="resmimetype">
  50     <value>text/microsoft-resx</value>
  51   </resheader>
  52   <resheader name="version">
  53     <value>2.0</value>
  54   </resheader>
  55   <resheader name="reader">
  56     <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
  57   </resheader>
  58   <resheader name="writer">
  59     <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
  60   </resheader>
  61   <data name="jsfunctions" xml:space="preserve">
  62     <value><![CDATA[
  63 /*  Prototype JavaScript framework, version 1.5.1
  64  *  (c) 2005-2007 Sam Stephenson
  65  *
  66  *  Prototype is freely distributable under the terms of an MIT-style license.
  67  *  For details, see the Prototype web site: http://www.prototypejs.org/
  68  *
  69 /*--------------------------------------------------------------------------*/
  70
  71 var Prototype = {
  72   Version: '1.5.1',
  73
  74   Browser: {
  75     IE:     !!(window.attachEvent && !window.opera),
  76     Opera:  !!window.opera,
  77     WebKit: navigator.userAgent.indexOf('AppleWebKit/') > -1,
  78     Gecko:  navigator.userAgent.indexOf('Gecko') > -1 && navigator.userAgent.indexOf('KHTML') == -1
  79   },
  80
  81   BrowserFeatures: {
  82     XPath: !!document.evaluate,
  83     ElementExtensions: !!window.HTMLElement,
  84     SpecificElementExtensions:
  85       (document.createElement('div').__proto__ !==
  86        document.createElement('form').__proto__)
  87   },
  88
  89   ScriptFragment: '<script[^>]*>([\u0001-\uFFFF]*?)</script>',
  90   JSONFilter: /^\/\*-secure-\s*(.*)\s*\*\/\s*$/,
  91
  92   emptyFunction: function() { },
  93   K: function(x) { return x }
  94 }
  95
  96 var Class = {
  97   create: function() {
  98     return function() {
  99       this.initialize.apply(this, arguments);
 100     }
 101   }
 102 }
 103
 104 var Abstract = new Object();
 105
 106 Object.extend = function(destination, source) {
 107   for (var property in source) {
 108     destination[property] = source[property];
 109   }
 110   return destination;
 111 }
 112
 113 Object.extend(Object, {
 114   inspect: function(object) {
 115     try {
 116       if (object === undefined) return 'undefined';
 117       if (object === null) return 'null';
 118       return object.inspect ? object.inspect() : object.toString();
 119     } catch (e) {
 120       if (e instanceof RangeError) return '...';
 121       throw e;
 122     }
 123   },
 124
 125   toJSON: function(object) {
 126     var type = typeof object;
 127     switch(type) {
 128       case 'undefined':
 129       case 'function':
 130       case 'unknown': return;
 131       case 'boolean': return object.toString();
 132     }
 133     if (object === null) return 'null';
 134     if (object.toJSON) return object.toJSON();
 135     if (object.ownerDocument === document) return;
 136     var results = [];
 137     for (var property in object) {
 138       var value = Object.toJSON(object[property]);
 139       if (value !== undefined)
 140         results.push(property.toJSON() + ': ' + value);
 141     }
 142     return '{' + results.join(', ') + '}';
 143   },
 144
 145   keys: function(object) {
 146     var keys = [];
 147     for (var property in object)
 148       keys.push(property);
 149     return keys;
 150   },
 151
 152   values: function(object) {
 153     var values = [];
 154     for (var property in object)
 155       values.push(object[property]);
 156     return values;
 157   },
 158
 159   clone: function(object) {
 160     return Object.extend({}, object);
 161   }
 162 });
 163
 164 Function.prototype.bind = function() {
 165   var __method = this, args = $A(arguments), object = args.shift();
 166   return function() {
 167     return __method.apply(object, args.concat($A(arguments)));
 168   }
 169 }
 170
 171 Function.prototype.bindAsEventListener = function(object) {
 172   var __method = this, args = $A(arguments), object = args.shift();
 173   return function(event) {
 174     return __method.apply(object, [event || window.event].concat(args));
 175   }
 176 }
 177
 178 Object.extend(Number.prototype, {
 179   toColorPart: function() {
 180     return this.toPaddedString(2, 16);
 181   },
 182
 183   succ: function() {
 184     return this + 1;
 185   },
 186
 187   times: function(iterator) {
 188     $R(0, this, true).each(iterator);
 189     return this;
 190   },
 191
 192   toPaddedString: function(length, radix) {
 193     var string = this.toString(radix || 10);
 194     return '0'.times(length - string.length) + string;
 195   },
 196
 197   toJSON: function() {
 198     return isFinite(this) ? this.toString() : 'null';
 199   }
 200 });
 201
 202 Date.prototype.toJSON = function() {
 203   return '"' + this.getFullYear() + '-' +
 204     (this.getMonth() + 1).toPaddedString(2) + '-' +
 205     this.getDate().toPaddedString(2) + 'T' +
 206     this.getHours().toPaddedString(2) + ':' +
 207     this.getMinutes().toPaddedString(2) + ':' +
 208     this.getSeconds().toPaddedString(2) + '"';
 209 };
 210
 211 var Try = {
 212   these: function() {
 213     var returnValue;
 214
 215     for (var i = 0, length = arguments.length; i < length; i++) {
 216       var lambda = arguments[i];
 217       try {
 218         returnValue = lambda();
 219         break;
 220       } catch (e) {}
 221     }
 222
 223     return returnValue;
 224   }
 225 }
 226
 227 /*--------------------------------------------------------------------------*/
 228
 229 var PeriodicalExecuter = Class.create();
 230 PeriodicalExecuter.prototype = {
 231   initialize: function(callback, frequency) {
 232     this.callback = callback;
 233     this.frequency = frequency;
 234     this.currentlyExecuting = false;
 235
 236     this.registerCallback();
 237   },
 238
 239   registerCallback: function() {
 240     this.timer = setInterval(this.onTimerEvent.bind(this), this.frequency * 1000);
 241   },
 242
 243   stop: function() {
 244     if (!this.timer) return;
 245     clearInterval(this.timer);
 246     this.timer = null;
 247   },
 248
 249   onTimerEvent: function() {
 250     if (!this.currentlyExecuting) {
 251       try {
 252         this.currentlyExecuting = true;
 253         this.callback(this);
 254       } finally {
 255         this.currentlyExecuting = false;
 256       }
 257     }
 258   }
 259 }
 260 Object.extend(String, {
 261   interpret: function(value) {
 262     return value == null ? '' : String(value);
 263   },
 264   specialChar: {
 265     '\b': '\\b',
 266     '\t': '\\t',
 267     '\n': '\\n',
 268     '\f': '\\f',
 269     '\r': '\\r',
 270     '\\': '\\\\'
 271   }
 272 });
 273
 274 Object.extend(String.prototype, {
 275   gsub: function(pattern, replacement) {
 276     var result = '', source = this, match;
 277     replacement = arguments.callee.prepareReplacement(replacement);
 278
 279     while (source.length > 0) {
 280       if (match = source.match(pattern)) {
 281         result += source.slice(0, match.index);
 282         result += String.interpret(replacement(match));
 283         source  = source.slice(match.index + match[0].length);
 284       } else {
 285         result += source, source = '';
 286       }
 287     }
 288     return result;
 289   },
 290
 291   sub: function(pattern, replacement, count) {
 292     replacement = this.gsub.prepareReplacement(replacement);
 293     count = count === undefined ? 1 : count;
 294
 295     return this.gsub(pattern, function(match) {
 296       if (--count < 0) return match[0];
 297       return replacement(match);
 298     });
 299   },
 300
 301   scan: function(pattern, iterator) {
 302     this.gsub(pattern, iterator);
 303     return this;
 304   },
 305
 306   truncate: function(length, truncation) {
 307     length = length || 30;
 308     truncation = truncation === undefined ? '...' : truncation;
 309     return this.length > length ?
 310       this.slice(0, length - truncation.length) + truncation : this;
 311   },
 312
 313   strip: function() {
 314     return this.replace(/^\s+/, '').replace(/\s+$/, '');
 315   },
 316
 317   stripTags: function() {
 318     return this.replace(/<\/?[^>]+>/gi, '');
 319   },
 320
 321   stripScripts: function() {
 322     return this.replace(new RegExp(Prototype.ScriptFragment, 'img'), '');
 323   },
 324
 325   extractScripts: function() {
 326     var matchAll = new RegExp(Prototype.ScriptFragment, 'img');
 327     var matchOne = new RegExp(Prototype.ScriptFragment, 'im');
 328     return (this.match(matchAll) || []).map(function(scriptTag) {
 329       return (scriptTag.match(matchOne) || ['', ''])[1];
 330     });
 331   },
 332
 333   evalScripts: function() {
 334     return this.extractScripts().map(function(script) { return eval(script) });
 335   },
 336
 337   escapeHTML: function() {
 338     var self = arguments.callee;
 339     self.text.data = this;
 340     return self.div.innerHTML;
 341   },
 342
 343   unescapeHTML: function() {
 344     var div = document.createElement('div');
 345     div.innerHTML = this.stripTags();
 346     return div.childNodes[0] ? (div.childNodes.length > 1 ?
 347       $A(div.childNodes).inject('', function(memo, node) { return memo+node.nodeValue }) :
 348       div.childNodes[0].nodeValue) : '';
 349   },
 350
 351   toQueryParams: function(separator) {
 352     var match = this.strip().match(/([^?#]*)(#.*)?$/);
 353     if (!match) return {};
 354
 355     return match[1].split(separator || '&').inject({}, function(hash, pair) {
 356       if ((pair = pair.split('='))[0]) {
 357         var key = decodeURIComponent(pair.shift());
 358         var value = pair.length > 1 ? pair.join('=') : pair[0];
 359         if (value != undefined) value = decodeURIComponent(value);
 360
 361         if (key in hash) {
 362           if (hash[key].constructor != Array) hash[key] = [hash[key]];
 363           hash[key].push(value);
 364         }
 365         else hash[key] = value;
 366       }
 367       return hash;
 368     });
 369   },
 370
 371   toArray: function() {
 372     return this.split('');
 373   },
 374
 375   succ: function() {
 376     return this.slice(0, this.length - 1) +
 377       String.fromCharCode(this.charCodeAt(this.length - 1) + 1);
 378   },
 379
 380   times: function(count) {
 381     var result = '';
 382     for (var i = 0; i < count; i++) result += this;
 383     return result;
 384   },
 385
 386   camelize: function() {
 387     var parts = this.split('-'), len = parts.length;
 388     if (len == 1) return parts[0];
 389
 390     var camelized = this.charAt(0) == '-'
 391       ? parts[0].charAt(0).toUpperCase() + parts[0].substring(1)
 392       : parts[0];
 393
 394     for (var i = 1; i < len; i++)
 395       camelized += parts[i].charAt(0).toUpperCase() + parts[i].substring(1);
 396
 397     return camelized;
 398   },
 399
 400   capitalize: function() {
 401     return this.charAt(0).toUpperCase() + this.substring(1).toLowerCase();
 402   },
 403
 404   underscore: function() {
 405     return this.gsub(/::/, '/').gsub(/([A-Z]+)([A-Z][a-z])/,'#{1}_#{2}').gsub(/([a-z\d])([A-Z])/,'#{1}_#{2}').gsub(/-/,'_').toLowerCase();
 406   },
 407
 408   dasherize: function() {
 409     return this.gsub(/_/,'-');
 410   },
 411
 412   inspect: function(useDoubleQuotes) {
 413     var escapedString = this.gsub(/[\x00-\x1f\\]/, function(match) {
 414       var character = String.specialChar[match[0]];
 415       return character ? character : '\\u00' + match[0].charCodeAt().toPaddedString(2, 16);
 416     });
 417     if (useDoubleQuotes) return '"' + escapedString.replace(/"/g, '\\"') + '"';
 418     return "'" + escapedString.replace(/'/g, '\\\'') + "'";
 419   },
 420
 421   toJSON: function() {
 422     return this.inspect(true);
 423   },
 424
 425   unfilterJSON: function(filter) {
 426     return this.sub(filter || Prototype.JSONFilter, '#{1}');
 427   },
 428
 429   evalJSON: function(sanitize) {
 430     var json = this.unfilterJSON();
 431     try {
 432       if (!sanitize || (/^("(\\.|[^"\\\n\r])*?"|[,:{}\[\]0-9.\-+Eaeflnr-u \n\r\t])+?$/.test(json)))
 433         return eval('(' + json + ')');
 434     } catch (e) { }
 435     throw new SyntaxError('Badly formed JSON string: ' + this.inspect());
 436   },
 437
 438   include: function(pattern) {
 439     return this.indexOf(pattern) > -1;
 440   },
 441
 442   startsWith: function(pattern) {
 443     return this.indexOf(pattern) === 0;
 444   },
 445
 446   endsWith: function(pattern) {
 447     var d = this.length - pattern.length;
 448     return d >= 0 && this.lastIndexOf(pattern) === d;
 449   },
 450
 451   empty: function() {
 452     return this == '';
 453   },
 454
 455   blank: function() {
 456     return /^\s*$/.test(this);
 457   }
 458 });
 459
 460 if (Prototype.Browser.WebKit || Prototype.Browser.IE) Object.extend(String.prototype, {
 461   escapeHTML: function() {
 462     return this.replace(/&/g,'&amp;').replace(/</g,'&lt;').replace(/>/g,'&gt;');
 463   },
 464   unescapeHTML: function() {
 465     return this.replace(/&amp;/g,'&').replace(/&lt;/g,'<').replace(/&gt;/g,'>');
 466   }
 467 });
 468
 469 String.prototype.gsub.prepareReplacement = function(replacement) {
 470   if (typeof replacement == 'function') return replacement;
 471   var template = new Template(replacement);
 472   return function(match) { return template.evaluate(match) };
 473 }
 474
 475 String.prototype.parseQuery = String.prototype.toQueryParams;
 476
 477 Object.extend(String.prototype.escapeHTML, {
 478   div:  document.createElement('div'),
 479   text: document.createTextNode('')
 480 });
 481
 482 with (String.prototype.escapeHTML) div.appendChild(text);
 483
 484 var Template = Class.create();
 485 Template.Pattern = /(^|.|\r|\n)(#\{(.*?)\})/;
 486 Template.prototype = {
 487   initialize: function(template, pattern) {
 488     this.template = template.toString();
 489     this.pattern  = pattern || Template.Pattern;
 490   },
 491
 492   evaluate: function(object) {
 493     return this.template.gsub(this.pattern, function(match) {
 494       var before = match[1];
 495       if (before == '\\') return match[2];
 496       return before + String.interpret(object[match[3]]);
 497     });
 498   }
 499 }
 500
 501 var $break = {}, $continue = new Error('"throw $continue" is deprecated, use "return" instead');
 502
 503 var Enumerable = {
 504   each: function(iterator) {
 505     var index = 0;
 506     try {
 507       this._each(function(value) {
 508         iterator(value, index++);
 509       });
 510     } catch (e) {
 511       if (e != $break) throw e;
 512     }
 513     return this;
 514   },
 515
 516   eachSlice: function(number, iterator) {
 517     var index = -number, slices = [], array = this.toArray();
 518     while ((index += number) < array.length)
 519       slices.push(array.slice(index, index+number));
 520     return slices.map(iterator);
 521   },
 522
 523   all: function(iterator) {
 524     var result = true;
 525     this.each(function(value, index) {
 526       result = result && !!(iterator || Prototype.K)(value, index);
 527       if (!result) throw $break;
 528     });
 529     return result;
 530   },
 531
 532   any: function(iterator) {
 533     var result = false;
 534     this.each(function(value, index) {
 535       if (result = !!(iterator || Prototype.K)(value, index))
 536         throw $break;
 537     });
 538     return result;
 539   },
 540
 541   collect: function(iterator) {
 542     var results = [];
 543     this.each(function(value, index) {
 544       results.push((iterator || Prototype.K)(value, index));
 545     });
 546     return results;
 547   },
 548
 549   detect: function(iterator) {
 550     var result;
 551     this.each(function(value, index) {
 552       if (iterator(value, index)) {
 553         result = value;
 554         throw $break;
 555       }
 556     });
 557     return result;
 558   },
 559
 560   findAll: function(iterator) {
 561     var results = [];
 562     this.each(function(value, index) {
 563       if (iterator(value, index))
 564         results.push(value);
 565     });
 566     return results;
 567   },
 568
 569   grep: function(pattern, iterator) {
 570     var results = [];
 571     this.each(function(value, index) {
 572       var stringValue = value.toString();
 573       if (stringValue.match(pattern))
 574         results.push((iterator || Prototype.K)(value, index));
 575     })
 576     return results;
 577   },
 578
 579   include: function(object) {
 580     var found = false;
 581     this.each(function(value) {
 582       if (value == object) {
 583         found = true;
 584         throw $break;
 585       }
 586     });
 587     return found;
 588   },
 589
 590   inGroupsOf: function(number, fillWith) {
 591     fillWith = fillWith === undefined ? null : fillWith;
 592     return this.eachSlice(number, function(slice) {
 593       while(slice.length < number) slice.push(fillWith);
 594       return slice;
 595     });
 596   },
 597
 598   inject: function(memo, iterator) {
 599     this.each(function(value, index) {
 600       memo = iterator(memo, value, index);
 601     });
 602     return memo;
 603   },
 604
 605   invoke: function(method) {
 606     var args = $A(arguments).slice(1);
 607     return this.map(function(value) {
 608       return value[method].apply(value, args);
 609     });
 610   },
 611
 612   max: function(iterator) {
 613     var result;
 614     this.each(function(value, index) {
 615       value = (iterator || Prototype.K)(value, index);
 616       if (result == undefined || value >= result)
 617         result = value;
 618     });
 619     return result;
 620   },
 621
 622   min: function(iterator) {
 623     var result;
 624     this.each(function(value, index) {
 625       value = (iterator || Prototype.K)(value, index);
 626       if (result == undefined || value < result)
 627         result = value;
 628     });
 629     return result;
 630   },
 631
 632   partition: function(iterator) {
 633     var trues = [], falses = [];
 634     this.each(function(value, index) {
 635       ((iterator || Prototype.K)(value, index) ?
 636         trues : falses).push(value);
 637     });
 638     return [trues, falses];
 639   },
 640
 641   pluck: function(property) {
 642     var results = [];
 643     this.each(function(value, index) {
 644       results.push(value[property]);
 645     });
 646     return results;
 647   },
 648
 649   reject: function(iterator) {
 650     var results = [];
 651     this.each(function(value, index) {
 652       if (!iterator(value, index))
 653         results.push(value);
 654     });
 655     return results;
 656   },
 657
 658   sortBy: function(iterator) {
 659     return this.map(function(value, index) {
 660       return {value: value, criteria: iterator(value, index)};
 661     }).sort(function(left, right) {
 662       var a = left.criteria, b = right.criteria;
 663       return a < b ? -1 : a > b ? 1 : 0;
 664     }).pluck('value');
 665   },
 666
 667   toArray: function() {
 668     return this.map();
 669   },
 670
 671   zip: function() {
 672     var iterator = Prototype.K, args = $A(arguments);
 673     if (typeof args.last() == 'function')
 674       iterator = args.pop();
 675
 676     var collections = [this].concat(args).map($A);
 677     return this.map(function(value, index) {
 678       return iterator(collections.pluck(index));
 679     });
 680   },
 681
 682   size: function() {
 683     return this.toArray().length;
 684   },
 685
 686   inspect: function() {
 687     return '#<Enumerable:' + this.toArray().inspect() + '>';
 688   }
 689 }
 690
 691 Object.extend(Enumerable, {
 692   map:     Enumerable.collect,
 693   find:    Enumerable.detect,
 694   select:  Enumerable.findAll,
 695   member:  Enumerable.include,
 696   entries: Enumerable.toArray
 697 });
 698 var $A = Array.from = function(iterable) {
 699   if (!iterable) return [];
 700   if (iterable.toArray) {
 701     return iterable.toArray();
 702   } else {
 703     var results = [];
 704     for (var i = 0, length = iterable.length; i < length; i++)
 705       results.push(iterable[i]);
 706     return results;
 707   }
 708 }
 709
 710 if (Prototype.Browser.WebKit) {
 711   $A = Array.from = function(iterable) {
 712     if (!iterable) return [];
 713     if (!(typeof iterable == 'function' && iterable == '[object NodeList]') &&
 714       iterable.toArray) {
 715       return iterable.toArray();
 716     } else {
 717       var results = [];
 718       for (var i = 0, length = iterable.length; i < length; i++)
 719         results.push(iterable[i]);
 720       return results;
 721     }
 722   }
 723 }
 724
 725 Object.extend(Array.prototype, Enumerable);
 726
 727 if (!Array.prototype._reverse)
 728   Array.prototype._reverse = Array.prototype.reverse;
 729
 730 Object.extend(Array.prototype, {
 731   _each: function(iterator) {
 732     for (var i = 0, length = this.length; i < length; i++)
 733       iterator(this[i]);
 734   },
 735
 736   clear: function() {
 737     this.length = 0;
 738     return this;
 739   },
 740
 741   first: function() {
 742     return this[0];
 743   },
 744
 745   last: function() {
 746     return this[this.length - 1];
 747   },
 748
 749   compact: function() {
 750     return this.select(function(value) {
 751       return value != null;
 752     });
 753   },
 754
 755   flatten: function() {
 756     return this.inject([], function(array, value) {
 757       return array.concat(value && value.constructor == Array ?
 758         value.flatten() : [value]);
 759     });
 760   },
 761
 762   without: function() {
 763     var values = $A(arguments);
 764     return this.select(function(value) {
 765       return !values.include(value);
 766     });
 767   },
 768
 769   indexOf: function(object) {
 770     for (var i = 0, length = this.length; i < length; i++)
 771       if (this[i] == object) return i;
 772     return -1;
 773   },
 774
 775   reverse: function(inline) {
 776     return (inline !== false ? this : this.toArray())._reverse();
 777   },
 778
 779   reduce: function() {
 780     return this.length > 1 ? this : this[0];
 781   },
 782
 783   uniq: function(sorted) {
 784     return this.inject([], function(array, value, index) {
 785       if (0 == index || (sorted ? array.last() != value : !array.include(value)))
 786         array.push(value);
 787       return array;
 788     });
 789   },
 790
 791   clone: function() {
 792     return [].concat(this);
 793   },
 794
 795   size: function() {
 796     return this.length;
 797   },
 798
 799   inspect: function() {
 800     return '[' + this.map(Object.inspect).join(', ') + ']';
 801   },
 802
 803   toJSON: function() {
 804     var results = [];
 805     this.each(function(object) {
 806       var value = Object.toJSON(object);
 807       if (value !== undefined) results.push(value);
 808     });
 809     return '[' + results.join(', ') + ']';
 810   }
 811 });
 812
 813 Array.prototype.toArray = Array.prototype.clone;
 814
 815 function $w(string) {
 816   string = string.strip();
 817   return string ? string.split(/\s+/) : [];
 818 }
 819
 820 if (Prototype.Browser.Opera){
 821   Array.prototype.concat = function() {
 822     var array = [];
 823     for (var i = 0, length = this.length; i < length; i++) array.push(this[i]);
 824     for (var i = 0, length = arguments.length; i < length; i++) {
 825       if (arguments[i].constructor == Array) {
 826         for (var j = 0, arrayLength = arguments[i].length; j < arrayLength; j++)
 827           array.push(arguments[i][j]);
 828       } else {
 829         array.push(arguments[i]);
 830       }
 831     }
 832     return array;
 833   }
 834 }
 835 var Hash = function(object) {
 836   if (object instanceof Hash) this.merge(object);
 837   else Object.extend(this, object || {});
 838 };
 839
 840 Object.extend(Hash, {
 841   toQueryString: function(obj) {
 842     var parts = [];
 843     parts.add = arguments.callee.addPair;
 844
 845     this.prototype._each.call(obj, function(pair) {
 846       if (!pair.key) return;
 847       var value = pair.value;
 848
 849       if (value && typeof value == 'object') {
 850         if (value.constructor == Array) value.each(function(value) {
 851           parts.add(pair.key, value);
 852         });
 853         return;
 854       }
 855       parts.add(pair.key, value);
 856     });
 857
 858     return parts.join('&');
 859   },
 860
 861   toJSON: function(object) {
 862     var results = [];
 863     this.prototype._each.call(object, function(pair) {
 864       var value = Object.toJSON(pair.value);
 865       if (value !== undefined) results.push(pair.key.toJSON() + ': ' + value);
 866     });
 867     return '{' + results.join(', ') + '}';
 868   }
 869 });
 870
 871 Hash.toQueryString.addPair = function(key, value, prefix) {
 872   key = encodeURIComponent(key);
 873   if (value === undefined) this.push(key);
 874   else this.push(key + '=' + (value == null ? '' : encodeURIComponent(value)));
 875 }
 876
 877 Object.extend(Hash.prototype, Enumerable);
 878 Object.extend(Hash.prototype, {
 879   _each: function(iterator) {
 880     for (var key in this) {
 881       var value = this[key];
 882       if (value && value == Hash.prototype[key]) continue;
 883
 884       var pair = [key, value];
 885       pair.key = key;
 886       pair.value = value;
 887       iterator(pair);
 888     }
 889   },
 890
 891   keys: function() {
 892     return this.pluck('key');
 893   },
 894
 895   values: function() {
 896     return this.pluck('value');
 897   },
 898
 899   merge: function(hash) {
 900     return $H(hash).inject(this, function(mergedHash, pair) {
 901       mergedHash[pair.key] = pair.value;
 902       return mergedHash;
 903     });
 904   },
 905
 906   remove: function() {
 907     var result;
 908     for(var i = 0, length = arguments.length; i < length; i++) {
 909       var value = this[arguments[i]];
 910       if (value !== undefined){
 911         if (result === undefined) result = value;
 912         else {
 913           if (result.constructor != Array) result = [result];
 914           result.push(value)
 915         }
 916       }
 917       delete this[arguments[i]];
 918     }
 919     return result;
 920   },
 921
 922   toQueryString: function() {
 923     return Hash.toQueryString(this);
 924   },
 925
 926   inspect: function() {
 927     return '#<Hash:{' + this.map(function(pair) {
 928       return pair.map(Object.inspect).join(': ');
 929     }).join(', ') + '}>';
 930   },
 931
 932   toJSON: function() {
 933     return Hash.toJSON(this);
 934   }
 935 });
 936
 937 function $H(object) {
 938   if (object instanceof Hash) return object;
 939   return new Hash(object);
 940 };
 941
 942 // Safari iterates over shadowed properties
 943 if (function() {
 944   var i = 0, Test = function(value) { this.key = value };
 945   Test.prototype.key = 'foo';
 946   for (var property in new Test('bar')) i++;
 947   return i > 1;
 948 }()) Hash.prototype._each = function(iterator) {
 949   var cache = [];
 950   for (var key in this) {
 951     var value = this[key];
 952     if ((value && value == Hash.prototype[key]) || cache.include(key)) continue;
 953     cache.push(key);
 954     var pair = [key, value];
 955     pair.key = key;
 956     pair.value = value;
 957     iterator(pair);
 958   }
 959 };
 960 ObjectRange = Class.create();
 961 Object.extend(ObjectRange.prototype, Enumerable);
 962 Object.extend(ObjectRange.prototype, {
 963   initialize: function(start, end, exclusive) {
 964     this.start = start;
 965     this.end = end;
 966     this.exclusive = exclusive;
 967   },
 968
 969   _each: function(iterator) {
 970     var value = this.start;
 971     while (this.include(value)) {
 972       iterator(value);
 973       value = value.succ();
 974     }
 975   },
 976
 977   include: function(value) {
 978     if (value < this.start)
 979       return false;
 980     if (this.exclusive)
 981       return value < this.end;
 982     return value <= this.end;
 983   }
 984 });
 985
 986 var $R = function(start, end, exclusive) {
 987   return new ObjectRange(start, end, exclusive);
 988 }
 989
 990 var Ajax = {
 991   getTransport: function() {
 992     return Try.these(
 993       function() {return new XMLHttpRequest()},
 994       function() {return new ActiveXObject('Msxml2.XMLHTTP')},
 995       function() {return new ActiveXObject('Microsoft.XMLHTTP')}
 996     ) || false;
 997   },
 998
 999   activeRequestCount: 0
1000 }
1001
1002 Ajax.Responders = {
1003   responders: [],
1004
1005   _each: function(iterator) {
1006     this.responders._each(iterator);
1007   },
1008
1009   register: function(responder) {
1010     if (!this.include(responder))
1011       this.responders.push(responder);
1012   },
1013
1014   unregister: function(responder) {
1015     this.responders = this.responders.without(responder);
1016   },
1017
1018   dispatch: function(callback, request, transport, json) {
1019     this.each(function(responder) {
1020       if (typeof responder[callback] == 'function') {
1021         try {
1022           responder[callback].apply(responder, [request, transport, json]);
1023         } catch (e) {}
1024       }
1025     });
1026   }
1027 };
1028
1029 Object.extend(Ajax.Responders, Enumerable);
1030
1031 Ajax.Responders.register({
1032   onCreate: function() {
1033     Ajax.activeRequestCount++;
1034   },
1035   onComplete: function() {
1036     Ajax.activeRequestCount--;
1037   }
1038 });
1039
1040 Ajax.Base = function() {};
1041 Ajax.Base.prototype = {
1042   setOptions: function(options) {
1043     this.options = {
1044       method:       'post',
1045       asynchronous: true,
1046       contentType:  'application/x-www-form-urlencoded',
1047       encoding:     'UTF-8',
1048       parameters:   ''
1049     }
1050     Object.extend(this.options, options || {});
1051
1052     this.options.method = this.options.method.toLowerCase();
1053     if (typeof this.options.parameters == 'string')
1054       this.options.parameters = this.options.parameters.toQueryParams();
1055   }
1056 }
1057
1058 Ajax.Request = Class.create();
1059 Ajax.Request.Events =
1060   ['Uninitialized', 'Loading', 'Loaded', 'Interactive', 'Complete'];
1061
1062 Ajax.Request.prototype = Object.extend(new Ajax.Base(), {
1063   _complete: false,
1064
1065   initialize: function(url, options) {
1066     this.transport = Ajax.getTransport();
1067     this.setOptions(options);
1068     this.request(url);
1069   },
1070
1071   request: function(url) {
1072     this.url = url;
1073     this.method = this.options.method;
1074     var params = Object.clone(this.options.parameters);
1075
1076     if (!['get', 'post'].include(this.method)) {
1077       // simulate other verbs over post
1078       params['_method'] = this.method;
1079       this.method = 'post';
1080     }
1081
1082     this.parameters = params;
1083
1084     if (params = Hash.toQueryString(params)) {
1085       // when GET, append parameters to URL
1086       if (this.method == 'get')
1087         this.url += (this.url.include('?') ? '&' : '?') + params;
1088       else if (/Konqueror|Safari|KHTML/.test(navigator.userAgent))
1089         params += '&_=';
1090     }
1091
1092     try {
1093       if (this.options.onCreate) this.options.onCreate(this.transport);
1094       Ajax.Responders.dispatch('onCreate', this, this.transport);
1095
1096       this.transport.open(this.method.toUpperCase(), this.url,
1097         this.options.asynchronous);
1098
1099       if (this.options.asynchronous)
1100         setTimeout(function() { this.respondToReadyState(1) }.bind(this), 10);
1101
1102       this.transport.onreadystatechange = this.onStateChange.bind(this);
1103       this.setRequestHeaders();
1104
1105       this.body = this.method == 'post' ? (this.options.postBody || params) : null;
1106       this.transport.send(this.body);
1107
1108       /* Force Firefox to handle ready state 4 for synchronous requests */
1109       if (!this.options.asynchronous && this.transport.overrideMimeType)
1110         this.onStateChange();
1111
1112     }
1113     catch (e) {
1114       this.dispatchException(e);
1115     }
1116   },
1117
1118   onStateChange: function() {
1119     var readyState = this.transport.readyState;
1120     if (readyState > 1 && !((readyState == 4) && this._complete))
1121       this.respondToReadyState(this.transport.readyState);
1122   },
1123
1124   setRequestHeaders: function() {
1125     var headers = {
1126       'X-Requested-With': 'XMLHttpRequest',
1127       'X-Prototype-Version': Prototype.Version,
1128       'Accept': 'text/javascript, text/html, application/xml, text/xml, */*'
1129     };
1130
1131     if (this.method == 'post') {
1132       headers['Content-type'] = this.options.contentType +
1133         (this.options.encoding ? '; charset=' + this.options.encoding : '');
1134
1135       /* Force "Connection: close" for older Mozilla browsers to work
1136        * around a bug where XMLHttpRequest sends an incorrect
1137        * Content-length header. See Mozilla Bugzilla #246651.
1138        */
1139       if (this.transport.overrideMimeType &&
1140           (navigator.userAgent.match(/Gecko\/(\d{4})/) || [0,2005])[1] < 2005)
1141             headers['Connection'] = 'close';
1142     }
1143
1144     // user-defined headers
1145     if (typeof this.options.requestHeaders == 'object') {
1146       var extras = this.options.requestHeaders;
1147
1148       if (typeof extras.push == 'function')
1149         for (var i = 0, length = extras.length; i < length; i += 2)
1150           headers[extras[i]] = extras[i+1];
1151       else
1152         $H(extras).each(function(pair) { headers[pair.key] = pair.value });
1153     }
1154
1155     for (var name in headers)
1156       this.transport.setRequestHeader(name, headers[name]);
1157   },
1158
1159   success: function() {
1160     return !this.transport.status
1161         || (this.transport.status >= 200 && this.transport.status < 300);
1162   },
1163
1164   respondToReadyState: function(readyState) {
1165     var state = Ajax.Request.Events[readyState];
1166     var transport = this.transport, json = this.evalJSON();
1167
1168     if (state == 'Complete') {
1169       try {
1170         this._complete = true;
1171         (this.options['on' + this.transport.status]
1172          || this.options['on' + (this.success() ? 'Success' : 'Failure')]
1173          || Prototype.emptyFunction)(transport, json);
1174       } catch (e) {
1175         this.dispatchException(e);
1176       }
1177
1178       var contentType = this.getHeader('Content-type');
1179       if (contentType && contentType.strip().
1180         match(/^(text|application)\/(x-)?(java|ecma)script(;.*)?$/i))
1181           this.evalResponse();
1182     }
1183
1184     try {
1185       (this.options['on' + state] || Prototype.emptyFunction)(transport, json);
1186       Ajax.Responders.dispatch('on' + state, this, transport, json);
1187     } catch (e) {
1188       this.dispatchException(e);
1189     }
1190
1191     if (state == 'Complete') {
1192       // avoid memory leak in MSIE: clean up
1193       this.transport.onreadystatechange = Prototype.emptyFunction;
1194     }
1195   },
1196
1197   getHeader: function(name) {
1198     try {
1199       return this.transport.getResponseHeader(name);
1200     } catch (e) { return null }
1201   },
1202
1203   evalJSON: function() {
1204     try {
1205       var json = this.getHeader('X-JSON');
1206       return json ? json.evalJSON() : null;
1207     } catch (e) { return null }
1208   },
1209
1210   evalResponse: function() {
1211     try {
1212       return eval((this.transport.responseText || '').unfilterJSON());
1213     } catch (e) {
1214       this.dispatchException(e);
1215     }
1216   },
1217
1218   dispatchException: function(exception) {
1219     (this.options.onException || Prototype.emptyFunction)(this, exception);
1220     Ajax.Responders.dispatch('onException', this, exception);
1221   }
1222 });
1223
1224 Ajax.Updater = Class.create();
1225
1226 Object.extend(Object.extend(Ajax.Updater.prototype, Ajax.Request.prototype), {
1227   initialize: function(container, url, options) {
1228     this.container = {
1229       success: (container.success || container),
1230       failure: (container.failure || (container.success ? null : container))
1231     }
1232
1233     this.transport = Ajax.getTransport();
1234     this.setOptions(options);
1235
1236     var onComplete = this.options.onComplete || Prototype.emptyFunction;
1237     this.options.onComplete = (function(transport, param) {
1238       this.updateContent();
1239       onComplete(transport, param);
1240     }).bind(this);
1241
1242     this.request(url);
1243   },
1244
1245   updateContent: function() {
1246     var receiver = this.container[this.success() ? 'success' : 'failure'];
1247     var response = this.transport.responseText;
1248
1249     if (!this.options.evalScripts) response = response.stripScripts();
1250
1251     if (receiver = $(receiver)) {
1252       if (this.options.insertion)
1253         new this.options.insertion(receiver, response);
1254       else
1255         receiver.update(response);
1256     }
1257
1258     if (this.success()) {
1259       if (this.onComplete)
1260         setTimeout(this.onComplete.bind(this), 10);
1261     }
1262   }
1263 });
1264
1265 Ajax.PeriodicalUpdater = Class.create();
1266 Ajax.PeriodicalUpdater.prototype = Object.extend(new Ajax.Base(), {
1267   initialize: function(container, url, options) {
1268     this.setOptions(options);
1269     this.onComplete = this.options.onComplete;
1270
1271     this.frequency = (this.options.frequency || 2);
1272     this.decay = (this.options.decay || 1);
1273
1274     this.updater = {};
1275     this.container = container;
1276     this.url = url;
1277
1278     this.start();
1279   },
1280
1281   start: function() {
1282     this.options.onComplete = this.updateComplete.bind(this);
1283     this.onTimerEvent();
1284   },
1285
1286   stop: function() {
1287     this.updater.options.onComplete = undefined;
1288     clearTimeout(this.timer);
1289     (this.onComplete || Prototype.emptyFunction).apply(this, arguments);
1290   },
1291
1292   updateComplete: function(request) {
1293     if (this.options.decay) {
1294       this.decay = (request.responseText == this.lastText ?
1295         this.decay * this.options.decay : 1);
1296
1297       this.lastText = request.responseText;
1298     }
1299     this.timer = setTimeout(this.onTimerEvent.bind(this),
1300       this.decay * this.frequency * 1000);
1301   },
1302
1303   onTimerEvent: function() {
1304     this.updater = new Ajax.Updater(this.container, this.url, this.options);
1305   }
1306 });
1307 function $(element) {
1308   if (arguments.length > 1) {
1309     for (var i = 0, elements = [], length = arguments.length; i < length; i++)
1310       elements.push($(arguments[i]));
1311     return elements;
1312   }
1313   if (typeof element == 'string')
1314     element = document.getElementById(element);
1315   return Element.extend(element);
1316 }
1317
1318 if (Prototype.BrowserFeatures.XPath) {
1319   document._getElementsByXPath = function(expression, parentElement) {
1320     var results = [];
1321     var query = document.evaluate(expression, $(parentElement) || document,
1322       null, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null);
1323     for (var i = 0, length = query.snapshotLength; i < length; i++)
1324       results.push(query.snapshotItem(i));
1325     return results;
1326   };
1327
1328   document.getElementsByClassName = function(className, parentElement) {
1329     var q = ".//*[contains(concat(' ', @class, ' '), ' " + className + " ')]";
1330     return document._getElementsByXPath(q, parentElement);
1331   }
1332
1333 } else document.getElementsByClassName = function(className, parentElement) {
1334   var children = ($(parentElement) || document.body).getElementsByTagName('*');
1335   var elements = [], child;
1336   for (var i = 0, length = children.length; i < length; i++) {
1337     child = children[i];
1338     if (Element.hasClassName(child, className))
1339       elements.push(Element.extend(child));
1340   }
1341   return elements;
1342 };
1343
1344 /*--------------------------------------------------------------------------*/
1345
1346 if (!window.Element) var Element = {};
1347
1348 Element.extend = function(element) {
1349   var F = Prototype.BrowserFeatures;
1350   if (!element || !element.tagName || element.nodeType == 3 ||
1351    element._extended || F.SpecificElementExtensions || element == window)
1352     return element;
1353
1354   var methods = {}, tagName = element.tagName, cache = Element.extend.cache,
1355    T = Element.Methods.ByTag;
1356
1357   // extend methods for all tags (Safari doesn't need this)
1358   if (!F.ElementExtensions) {
1359     Object.extend(methods, Element.Methods),
1360     Object.extend(methods, Element.Methods.Simulated);
1361   }
1362
1363   // extend methods for specific tags
1364   if (T[tagName]) Object.extend(methods, T[tagName]);
1365
1366   for (var property in methods) {
1367     var value = methods[property];
1368     if (typeof value == 'function' && !(property in element))
1369       element[property] = cache.findOrStore(value);
1370   }
1371
1372   element._extended = Prototype.emptyFunction;
1373   return element;
1374 };
1375
1376 Element.extend.cache = {
1377   findOrStore: function(value) {
1378     return this[value] = this[value] || function() {
1379       return value.apply(null, [this].concat($A(arguments)));
1380     }
1381   }
1382 };
1383
1384 Element.Methods = {
1385   visible: function(element) {
1386     return $(element).style.display != 'none';
1387   },
1388
1389   toggle: function(element) {
1390     element = $(element);
1391     Element[Element.visible(element) ? 'hide' : 'show'](element);
1392     return element;
1393   },
1394
1395   hide: function(element) {
1396     $(element).style.display = 'none';
1397     return element;
1398   },
1399
1400   show: function(element) {
1401     $(element).style.display = '';
1402     return element;
1403   },
1404
1405   remove: function(element) {
1406     element = $(element);
1407     element.parentNode.removeChild(element);
1408     return element;
1409   },
1410
1411   update: function(element, html) {
1412     html = typeof html == 'undefined' ? '' : html.toString();
1413     $(element).innerHTML = html.stripScripts();
1414     setTimeout(function() {html.evalScripts()}, 10);
1415     return element;
1416   },
1417
1418   replace: function(element, html) {
1419     element = $(element);
1420     html = typeof html == 'undefined' ? '' : html.toString();
1421     if (element.outerHTML) {
1422       element.outerHTML = html.stripScripts();
1423     } else {
1424       var range = element.ownerDocument.createRange();
1425       range.selectNodeContents(element);
1426       element.parentNode.replaceChild(
1427         range.createContextualFragment(html.stripScripts()), element);
1428     }
1429     setTimeout(function() {html.evalScripts()}, 10);
1430     return element;
1431   },
1432
1433   inspect: function(element) {
1434     element = $(element);
1435     var result = '<' + element.tagName.toLowerCase();
1436     $H({'id': 'id', 'className': 'class'}).each(function(pair) {
1437       var property = pair.first(), attribute = pair.last();
1438       var value = (element[property] || '').toString();
1439       if (value) result += ' ' + attribute + '=' + value.inspect(true);
1440     });
1441     return result + '>';
1442   },
1443
1444   recursivelyCollect: function(element, property) {
1445     element = $(element);
1446     var elements = [];
1447     while (element = element[property])
1448       if (element.nodeType == 1)
1449         elements.push(Element.extend(element));
1450     return elements;
1451   },
1452
1453   ancestors: function(element) {
1454     return $(element).recursivelyCollect('parentNode');
1455   },
1456
1457   descendants: function(element) {
1458     return $A($(element).getElementsByTagName('*')).each(Element.extend);
1459   },
1460
1461   firstDescendant: function(element) {
1462     element = $(element).firstChild;
1463     while (element && element.nodeType != 1) element = element.nextSibling;
1464     return $(element);
1465   },
1466
1467   immediateDescendants: function(element) {
1468     if (!(element = $(element).firstChild)) return [];
1469     while (element && element.nodeType != 1) element = element.nextSibling;
1470     if (element) return [element].concat($(element).nextSiblings());
1471     return [];
1472   },
1473
1474   previousSiblings: function(element) {
1475     return $(element).recursivelyCollect('previousSibling');
1476   },
1477
1478   nextSiblings: function(element) {
1479     return $(element).recursivelyCollect('nextSibling');
1480   },
1481
1482   siblings: function(element) {
1483     element = $(element);
1484     return element.previousSiblings().reverse().concat(element.nextSiblings());
1485   },
1486
1487   match: function(element, selector) {
1488     if (typeof selector == 'string')
1489       selector = new Selector(selector);
1490     return selector.match($(element));
1491   },
1492
1493   up: function(element, expression, index) {
1494     element = $(element);
1495     if (arguments.length == 1) return $(element.parentNode);
1496     var ancestors = element.ancestors();
1497     return expression ? Selector.findElement(ancestors, expression, index) :
1498       ancestors[index || 0];
1499   },
1500
1501   down: function(element, expression, index) {
1502     element = $(element);
1503     if (arguments.length == 1) return element.firstDescendant();
1504     var descendants = element.descendants();
1505     return expression ? Selector.findElement(descendants, expression, index) :
1506       descendants[index || 0];
1507   },
1508
1509   previous: function(element, expression, index) {
1510     element = $(element);
1511     if (arguments.length == 1) return $(Selector.handlers.previousElementSibling(element));
1512     var previousSiblings = element.previousSiblings();
1513     return expression ? Selector.findElement(previousSiblings, expression, index) :
1514       previousSiblings[index || 0];
1515   },
1516
1517   next: function(element, expression, index) {
1518     element = $(element);
1519     if (arguments.length == 1) return $(Selector.handlers.nextElementSibling(element));
1520     var nextSiblings = element.nextSiblings();
1521     return expression ? Selector.findElement(nextSiblings, expression, index) :
1522       nextSiblings[index || 0];
1523   },
1524
1525   getElementsBySelector: function() {
1526     var args = $A(arguments), element = $(args.shift());
1527     return Selector.findChildElements(element, args);
1528   },
1529
1530   getElementsByClassName: function(element, className) {
1531     return document.getElementsByClassName(className, element);
1532   },
1533
1534   readAttribute: function(element, name) {
1535     element = $(element);
1536     if (Prototype.Browser.IE) {
1537       if (!element.attributes) return null;
1538       var t = Element._attributeTranslations;
1539       if (t.values[name]) return t.values[name](element, name);
1540       if (t.names[name])  name = t.names[name];
1541       var attribute = element.attributes[name];
1542       return attribute ? attribute.nodeValue : null;
1543     }
1544     return element.getAttribute(name);
1545   },
1546
1547   getHeight: function(element) {
1548     return $(element).getDimensions().height;
1549   },
1550
1551   getWidth: function(element) {
1552     return $(element).getDimensions().width;
1553   },
1554
1555   classNames: function(element) {
1556     return new Element.ClassNames(element);
1557   },
1558
1559   hasClassName: function(element, className) {
1560     if (!(element = $(element))) return;
1561     var elementClassName = element.className;
1562     if (elementClassName.length == 0) return false;
1563     if (elementClassName == className ||
1564         elementClassName.match(new RegExp("(^|\\s)" + className + "(\\s|$)")))
1565       return true;
1566     return false;
1567   },
1568
1569   addClassName: function(element, className) {
1570     if (!(element = $(element))) return;
1571     Element.classNames(element).add(className);
1572     return element;
1573   },
1574
1575   removeClassName: function(element, className) {
1576     if (!(element = $(element))) return;
1577     Element.classNames(element).remove(className);
1578     return element;
1579   },
1580
1581   toggleClassName: function(element, className) {
1582     if (!(element = $(element))) return;
1583     Element.classNames(element)[element.hasClassName(className) ? 'remove' : 'add'](className);
1584     return element;
1585   },
1586
1587   observe: function() {
1588     Event.observe.apply(Event, arguments);
1589     return $A(arguments).first();
1590   },
1591
1592   stopObserving: function() {
1593     Event.stopObserving.apply(Event, arguments);
1594     return $A(arguments).first();
1595   },
1596
1597   // removes whitespace-only text node children
1598   cleanWhitespace: function(element) {
1599     element = $(element);
1600     var node = element.firstChild;
1601     while (node) {
1602       var nextNode = node.nextSibling;
1603       if (node.nodeType == 3 && !/\S/.test(node.nodeValue))
1604         element.removeChild(node);
1605       node = nextNode;
1606     }
1607     return element;
1608   },
1609
1610   empty: function(element) {
1611     return $(element).innerHTML.blank();
1612   },
1613
1614   descendantOf: function(element, ancestor) {
1615     element = $(element), ancestor = $(ancestor);
1616     while (element = element.parentNode)
1617       if (element == ancestor) return true;
1618     return false;
1619   },
1620
1621   scrollTo: function(element) {
1622     element = $(element);
1623     var pos = Position.cumulativeOffset(element);
1624     window.scrollTo(pos[0], pos[1]);
1625     return element;
1626   },
1627
1628   getStyle: function(element, style) {
1629     element = $(element);
1630     style = style == 'float' ? 'cssFloat' : style.camelize();
1631     var value = element.style[style];
1632     if (!value) {
1633       var css = document.defaultView.getComputedStyle(element, null);
1634       value = css ? css[style] : null;
1635     }
1636     if (style == 'opacity') return value ? parseFloat(value) : 1.0;
1637     return value == 'auto' ? null : value;
1638   },
1639
1640   getOpacity: function(element) {
1641     return $(element).getStyle('opacity');
1642   },
1643
1644   setStyle: function(element, styles, camelized) {
1645     element = $(element);
1646     var elementStyle = element.style;
1647
1648     for (var property in styles)
1649       if (property == 'opacity') element.setOpacity(styles[property])
1650       else
1651         elementStyle[(property == 'float' || property == 'cssFloat') ?
1652           (elementStyle.styleFloat === undefined ? 'cssFloat' : 'styleFloat') :
1653           (camelized ? property : property.camelize())] = styles[property];
1654
1655     return element;
1656   },
1657
1658   setOpacity: function(element, value) {
1659     element = $(element);
1660     element.style.opacity = (value == 1 || value === '') ? '' :
1661       (value < 0.00001) ? 0 : value;
1662     return element;
1663   },
1664
1665   getDimensions: function(element) {
1666     element = $(element);
1667     var display = $(element).getStyle('display');
1668     if (display != 'none' && display != null) // Safari bug
1669       return {width: element.offsetWidth, height: element.offsetHeight};
1670
1671     // All *Width and *Height properties give 0 on elements with display none,
1672     // so enable the element temporarily
1673     var els = element.style;
1674     var originalVisibility = els.visibility;
1675     var originalPosition = els.position;
1676     var originalDisplay = els.display;
1677     els.visibility = 'hidden';
1678     els.position = 'absolute';
1679     els.display = 'block';
1680     var originalWidth = element.clientWidth;
1681     var originalHeight = element.clientHeight;
1682     els.display = originalDisplay;
1683     els.position = originalPosition;
1684     els.visibility = originalVisibility;
1685     return {width: originalWidth, height: originalHeight};
1686   },
1687
1688   makePositioned: function(element) {
1689     element = $(element);
1690     var pos = Element.getStyle(element, 'position');
1691     if (pos == 'static' || !pos) {
1692       element._madePositioned = true;
1693       element.style.position = 'relative';
1694       // Opera returns the offset relative to the positioning context, when an
1695       // element is position relative but top and left have not been defined
1696       if (window.opera) {
1697         element.style.top = 0;
1698         element.style.left = 0;
1699       }
1700     }
1701     return element;
1702   },
1703
1704   undoPositioned: function(element) {
1705     element = $(element);
1706     if (element._madePositioned) {
1707       element._madePositioned = undefined;
1708       element.style.position =
1709         element.style.top =
1710         element.style.left =
1711         element.style.bottom =
1712         element.style.right = '';
1713     }
1714     return element;
1715   },
1716
1717   makeClipping: function(element) {
1718     element = $(element);
1719     if (element._overflow) return element;
1720     element._overflow = element.style.overflow || 'auto';
1721     if ((Element.getStyle(element, 'overflow') || 'visible') != 'hidden')
1722       element.style.overflow = 'hidden';
1723     return element;
1724   },
1725
1726   undoClipping: function(element) {
1727     element = $(element);
1728     if (!element._overflow) return element;
1729     element.style.overflow = element._overflow == 'auto' ? '' : element._overflow;
1730     element._overflow = null;
1731     return element;
1732   }
1733 };
1734
1735 Object.extend(Element.Methods, {
1736   childOf: Element.Methods.descendantOf,
1737   childElements: Element.Methods.immediateDescendants
1738 });
1739
1740 if (Prototype.Browser.Opera) {
1741   Element.Methods._getStyle = Element.Methods.getStyle;
1742   Element.Methods.getStyle = function(element, style) {
1743     switch(style) {
1744       case 'left':
1745       case 'top':
1746       case 'right':
1747       case 'bottom':
1748         if (Element._getStyle(element, 'position') == 'static') return null;
1749       default: return Element._getStyle(element, style);
1750     }
1751   };
1752 }
1753 else if (Prototype.Browser.IE) {
1754   Element.Methods.getStyle = function(element, style) {
1755     element = $(element);
1756     style = (style == 'float' || style == 'cssFloat') ? 'styleFloat' : style.camelize();
1757     var value = element.style[style];
1758     if (!value && element.currentStyle) value = element.currentStyle[style];
1759
1760     if (style == 'opacity') {
1761       if (value = (element.getStyle('filter') || '').match(/alpha\(opacity=(.*)\)/))
1762         if (value[1]) return parseFloat(value[1]) / 100;
1763       return 1.0;
1764     }
1765
1766     if (value == 'auto') {
1767       if ((style == 'width' || style == 'height') && (element.getStyle('display') != 'none'))
1768         return element['offset'+style.capitalize()] + 'px';
1769       return null;
1770     }
1771     return value;
1772   };
1773
1774   Element.Methods.setOpacity = function(element, value) {
1775     element = $(element);
1776     var filter = element.getStyle('filter'), style = element.style;
1777     if (value == 1 || value === '') {
1778       style.filter = filter.replace(/alpha\([^\)]*\)/gi,'');
1779       return element;
1780     } else if (value < 0.00001) value = 0;
1781     style.filter = filter.replace(/alpha\([^\)]*\)/gi, '') +
1782       'alpha(opacity=' + (value * 100) + ')';
1783     return element;
1784   };
1785
1786   // IE is missing .innerHTML support for TABLE-related elements
1787   Element.Methods.update = function(element, html) {
1788     element = $(element);
1789     html = typeof html == 'undefined' ? '' : html.toString();
1790     var tagName = element.tagName.toUpperCase();
1791     if (['THEAD','TBODY','TR','TD'].include(tagName)) {
1792       var div = document.createElement('div');
1793       switch (tagName) {
1794         case 'THEAD':
1795         case 'TBODY':
1796           div.innerHTML = '<table><tbody>' +  html.stripScripts() + '</tbody></table>';
1797           depth = 2;
1798           break;
1799         case 'TR':
1800           div.innerHTML = '<table><tbody><tr>' +  html.stripScripts() + '</tr></tbody></table>';
1801           depth = 3;
1802           break;
1803         case 'TD':
1804           div.innerHTML = '<table><tbody><tr><td>' +  html.stripScripts() + '</td></tr></tbody></table>';
1805           depth = 4;
1806       }
1807       $A(element.childNodes).each(function(node) { element.removeChild(node) });
1808       depth.times(function() { div = div.firstChild });
1809       $A(div.childNodes).each(function(node) { element.appendChild(node) });
1810     } else {
1811       element.innerHTML = html.stripScripts();
1812     }
1813     setTimeout(function() { html.evalScripts() }, 10);
1814     return element;
1815   }
1816 }
1817 else if (Prototype.Browser.Gecko) {
1818   Element.Methods.setOpacity = function(element, value) {
1819     element = $(element);
1820     element.style.opacity = (value == 1) ? 0.999999 :
1821       (value === '') ? '' : (value < 0.00001) ? 0 : value;
1822     return element;
1823   };
1824 }
1825
1826 Element._attributeTranslations = {
1827   names: {
1828     colspan:   "colSpan",
1829     rowspan:   "rowSpan",
1830     valign:    "vAlign",
1831     datetime:  "dateTime",
1832     accesskey: "accessKey",
1833     tabindex:  "tabIndex",
1834     enctype:   "encType",
1835     maxlength: "maxLength",
1836     readonly:  "readOnly",
1837     longdesc:  "longDesc"
1838   },
1839   values: {
1840     _getAttr: function(element, attribute) {
1841       return element.getAttribute(attribute, 2);
1842     },
1843     _flag: function(element, attribute) {
1844       return $(element).hasAttribute(attribute) ? attribute : null;
1845     },
1846     style: function(element) {
1847       return element.style.cssText.toLowerCase();
1848     },
1849     title: function(element) {
1850       var node = element.getAttributeNode('title');
1851       return node.specified ? node.nodeValue : null;
1852     }
1853   }
1854 };
1855
1856 (function() {
1857   Object.extend(this, {
1858     href: this._getAttr,
1859     src:  this._getAttr,
1860     type: this._getAttr,
1861     disabled: this._flag,
1862     checked:  this._flag,
1863     readonly: this._flag,
1864     multiple: this._flag
1865   });
1866 }).call(Element._attributeTranslations.values);
1867
1868 Element.Methods.Simulated = {
1869   hasAttribute: function(element, attribute) {
1870     var t = Element._attributeTranslations, node;
1871     attribute = t.names[attribute] || attribute;
1872     node = $(element).getAttributeNode(attribute);
1873     return node && node.specified;
1874   }
1875 };
1876
1877 Element.Methods.ByTag = {};
1878
1879 Object.extend(Element, Element.Methods);
1880
1881 if (!Prototype.BrowserFeatures.ElementExtensions &&
1882  document.createElement('div').__proto__) {
1883   window.HTMLElement = {};
1884   window.HTMLElement.prototype = document.createElement('div').__proto__;
1885   Prototype.BrowserFeatures.ElementExtensions = true;
1886 }
1887
1888 Element.hasAttribute = function(element, attribute) {
1889   if (element.hasAttribute) return element.hasAttribute(attribute);
1890   return Element.Methods.Simulated.hasAttribute(element, attribute);
1891 };
1892
1893 Element.addMethods = function(methods) {
1894   var F = Prototype.BrowserFeatures, T = Element.Methods.ByTag;
1895
1896   if (!methods) {
1897     Object.extend(Form, Form.Methods);
1898     Object.extend(Form.Element, Form.Element.Methods);
1899     Object.extend(Element.Methods.ByTag, {
1900       "FORM":     Object.clone(Form.Methods),
1901       "INPUT":    Object.clone(Form.Element.Methods),
1902       "SELECT":   Object.clone(Form.Element.Methods),
1903       "TEXTAREA": Object.clone(Form.Element.Methods)
1904     });
1905   }
1906
1907   if (arguments.length == 2) {
1908     var tagName = methods;
1909     methods = arguments[1];
1910   }
1911
1912   if (!tagName) Object.extend(Element.Methods, methods || {});
1913   else {
1914     if (tagName.constructor == Array) tagName.each(extend);
1915     else extend(tagName);
1916   }
1917
1918   function extend(tagName) {
1919     tagName = tagName.toUpperCase();
1920     if (!Element.Methods.ByTag[tagName])
1921       Element.Methods.ByTag[tagName] = {};
1922     Object.extend(Element.Methods.ByTag[tagName], methods);
1923   }
1924
1925   function copy(methods, destination, onlyIfAbsent) {
1926     onlyIfAbsent = onlyIfAbsent || false;
1927     var cache = Element.extend.cache;
1928     for (var property in methods) {
1929       var value = methods[property];
1930       if (!onlyIfAbsent || !(property in destination))
1931         destination[property] = cache.findOrStore(value);
1932     }
1933   }
1934
1935   function findDOMClass(tagName) {
1936     var klass;
1937     var trans = {
1938       "OPTGROUP": "OptGroup", "TEXTAREA": "TextArea", "P": "Paragraph",
1939       "FIELDSET": "FieldSet", "UL": "UList", "OL": "OList", "DL": "DList",
1940       "DIR": "Directory", "H1": "Heading", "H2": "Heading", "H3": "Heading",
1941       "H4": "Heading", "H5": "Heading", "H6": "Heading", "Q": "Quote",
1942       "INS": "Mod", "DEL": "Mod", "A": "Anchor", "IMG": "Image", "CAPTION":
1943       "TableCaption", "COL": "TableCol", "COLGROUP": "TableCol", "THEAD":
1944       "TableSection", "TFOOT": "TableSection", "TBODY": "TableSection", "TR":
1945       "TableRow", "TH": "TableCell", "TD": "TableCell", "FRAMESET":
1946       "FrameSet", "IFRAME": "IFrame"
1947     };
1948     if (trans[tagName]) klass = 'HTML' + trans[tagName] + 'Element';
1949     if (window[klass]) return window[klass];
1950     klass = 'HTML' + tagName + 'Element';
1951     if (window[klass]) return window[klass];
1952     klass = 'HTML' + tagName.capitalize() + 'Element';
1953     if (window[klass]) return window[klass];
1954
1955     window[klass] = {};
1956     window[klass].prototype = document.createElement(tagName).__proto__;
1957     return window[klass];
1958   }
1959
1960   if (F.ElementExtensions) {
1961     copy(Element.Methods, HTMLElement.prototype);
1962     copy(Element.Methods.Simulated, HTMLElement.prototype, true);
1963   }
1964
1965   if (F.SpecificElementExtensions) {
1966     for (var tag in Element.Methods.ByTag) {
1967       var klass = findDOMClass(tag);
1968       if (typeof klass == "undefined") continue;
1969       copy(T[tag], klass.prototype);
1970     }
1971   }
1972
1973   Object.extend(Element, Element.Methods);
1974   delete Element.ByTag;
1975 };
1976
1977 var Toggle = { display: Element.toggle };
1978
1979 /*--------------------------------------------------------------------------*/
1980
1981 Abstract.Insertion = function(adjacency) {
1982   this.adjacency = adjacency;
1983 }
1984
1985 Abstract.Insertion.prototype = {
1986   initialize: function(element, content) {
1987     this.element = $(element);
1988     this.content = content.stripScripts();
1989
1990     if (this.adjacency && this.element.insertAdjacentHTML) {
1991       try {
1992         this.element.insertAdjacentHTML(this.adjacency, this.content);
1993       } catch (e) {
1994         var tagName = this.element.tagName.toUpperCase();
1995         if (['TBODY', 'TR'].include(tagName)) {
1996           this.insertContent(this.contentFromAnonymousTable());
1997         } else {
1998           throw e;
1999         }
2000       }
2001     } else {
2002       this.range = this.element.ownerDocument.createRange();
2003       if (this.initializeRange) this.initializeRange();
2004       this.insertContent([this.range.createContextualFragment(this.content)]);
2005     }
2006
2007     setTimeout(function() {content.evalScripts()}, 10);
2008   },
2009
2010   contentFromAnonymousTable: function() {
2011     var div = document.createElement('div');
2012     div.innerHTML = '<table><tbody>' + this.content + '</tbody></table>';
2013     return $A(div.childNodes[0].childNodes[0].childNodes);
2014   }
2015 }
2016
2017 var Insertion = new Object();
2018
2019 Insertion.Before = Class.create();
2020 Insertion.Before.prototype = Object.extend(new Abstract.Insertion('beforeBegin'), {
2021   initializeRange: function() {
2022     this.range.setStartBefore(this.element);
2023   },
2024
2025   insertContent: function(fragments) {
2026     fragments.each((function(fragment) {
2027       this.element.parentNode.insertBefore(fragment, this.element);
2028     }).bind(this));
2029   }
2030 });
2031
2032 Insertion.Top = Class.create();
2033 Insertion.Top.prototype = Object.extend(new Abstract.Insertion('afterBegin'), {
2034   initializeRange: function() {
2035     this.range.selectNodeContents(this.element);
2036     this.range.collapse(true);
2037   },
2038
2039   insertContent: function(fragments) {
2040     fragments.reverse(false).each((function(fragment) {
2041       this.element.insertBefore(fragment, this.element.firstChild);
2042     }).bind(this));
2043   }
2044 });
2045
2046 Insertion.Bottom = Class.create();
2047 Insertion.Bottom.prototype = Object.extend(new Abstract.Insertion('beforeEnd'), {
2048   initializeRange: function() {
2049     this.range.selectNodeContents(this.element);
2050     this.range.collapse(this.element);
2051   },
2052
2053   insertContent: function(fragments) {
2054     fragments.each((function(fragment) {
2055       this.element.appendChild(fragment);
2056     }).bind(this));
2057   }
2058 });
2059
2060 Insertion.After = Class.create();
2061 Insertion.After.prototype = Object.extend(new Abstract.Insertion('afterEnd'), {
2062   initializeRange: function() {
2063     this.range.setStartAfter(this.element);
2064   },
2065
2066   insertContent: function(fragments) {
2067     fragments.each((function(fragment) {
2068       this.element.parentNode.insertBefore(fragment,
2069         this.element.nextSibling);
2070     }).bind(this));
2071   }
2072 });
2073
2074 /*--------------------------------------------------------------------------*/
2075
2076 Element.ClassNames = Class.create();
2077 Element.ClassNames.prototype = {
2078   initialize: function(element) {
2079     this.element = $(element);
2080   },
2081
2082   _each: function(iterator) {
2083     this.element.className.split(/\s+/).select(function(name) {
2084       return name.length > 0;
2085     })._each(iterator);
2086   },
2087
2088   set: function(className) {
2089     this.element.className = className;
2090   },
2091
2092   add: function(classNameToAdd) {
2093     if (this.include(classNameToAdd)) return;
2094     this.set($A(this).concat(classNameToAdd).join(' '));
2095   },
2096
2097   remove: function(classNameToRemove) {
2098     if (!this.include(classNameToRemove)) return;
2099     this.set($A(this).without(classNameToRemove).join(' '));
2100   },
2101
2102   toString: function() {
2103     return $A(this).join(' ');
2104   }
2105 };
2106
2107 Object.extend(Element.ClassNames.prototype, Enumerable);
2108 // Portions of the Selector class are derived from Jack Slocum's DomQuery,
2109 // part of YUI-Ext version 0.40, distributed under the terms of an MIT-style
2110 // license.  Please see http://www.yui-ext.com/ for more information.
2111
2112 var Selector = Class.create();
2113
2114 Selector.prototype = {
2115   initialize: function(expression) {
2116     this.expression = expression.strip();
2117     this.compileMatcher();
2118   },
2119
2120   compileMatcher: function() {
2121     // Selectors with namespaced attributes can't use the XPath version
2122     if (Prototype.BrowserFeatures.XPath && !(/\[[\w-]*?:/).test(this.expression))
2123       return this.compileXPathMatcher();
2124
2125     var e = this.expression, ps = Selector.patterns, h = Selector.handlers,
2126         c = Selector.criteria, le, p, m;
2127
2128     if (Selector._cache[e]) {
2129       this.matcher = Selector._cache[e]; return;
2130     }
2131     this.matcher = ["this.matcher = function(root) {",
2132                     "var r = root, h = Selector.handlers, c = false, n;"];
2133
2134     while (e && le != e && (/\S/).test(e)) {
2135       le = e;
2136       for (var i in ps) {
2137         p = ps[i];
2138         if (m = e.match(p)) {
2139           this.matcher.push(typeof c[i] == 'function' ? c[i](m) :
2140               new Template(c[i]).evaluate(m));
2141           e = e.replace(m[0], '');
2142           break;
2143         }
2144       }
2145     }
2146
2147     this.matcher.push("return h.unique(n);\n}");
2148     eval(this.matcher.join('\n'));
2149     Selector._cache[this.expression] = this.matcher;
2150   },
2151
2152   compileXPathMatcher: function() {
2153     var e = this.expression, ps = Selector.patterns,
2154         x = Selector.xpath, le,  m;
2155
2156     if (Selector._cache[e]) {
2157       this.xpath = Selector._cache[e]; return;
2158     }
2159
2160     this.matcher = ['.//*'];
2161     while (e && le != e && (/\S/).test(e)) {
2162       le = e;
2163       for (var i in ps) {
2164         if (m = e.match(ps[i])) {
2165           this.matcher.push(typeof x[i] == 'function' ? x[i](m) :
2166             new Template(x[i]).evaluate(m));
2167           e = e.replace(m[0], '');
2168           break;
2169         }
2170       }
2171     }
2172
2173     this.xpath = this.matcher.join('');
2174     Selector._cache[this.expression] = this.xpath;
2175   },
2176
2177   findElements: function(root) {
2178     root = root || document;
2179     if (this.xpath) return document._getElementsByXPath(this.xpath, root);
2180     return this.matcher(root);
2181   },
2182
2183   match: function(element) {
2184     return this.findElements(document).include(element);
2185   },
2186
2187   toString: function() {
2188     return this.expression;
2189   },
2190
2191   inspect: function() {
2192     return "#<Selector:" + this.expression.inspect() + ">";
2193   }
2194 };
2195
2196 Object.extend(Selector, {
2197   _cache: {},
2198
2199   xpath: {
2200     descendant:   "//*",
2201     child:        "/*",
2202     adjacent:     "/following-sibling::*[1]",
2203     laterSibling: '/following-sibling::*',
2204     tagName:      function(m) {
2205       if (m[1] == '*') return '';
2206       return "[local-name()='" + m[1].toLowerCase() +
2207              "' or local-name()='" + m[1].toUpperCase() + "']";
2208     },
2209     className:    "[contains(concat(' ', @class, ' '), ' #{1} ')]",
2210     id:           "[@id='#{1}']",
2211     attrPresence: "[@#{1}]",
2212     attr: function(m) {
2213       m[3] = m[5] || m[6];
2214       return new Template(Selector.xpath.operators[m[2]]).evaluate(m);
2215     },
2216     pseudo: function(m) {
2217       var h = Selector.xpath.pseudos[m[1]];
2218       if (!h) return '';
2219       if (typeof h === 'function') return h(m);
2220       return new Template(Selector.xpath.pseudos[m[1]]).evaluate(m);
2221     },
2222     operators: {
2223       '=':  "[@#{1}='#{3}']",
2224       '!=': "[@#{1}!='#{3}']",
2225       '^=': "[starts-with(@#{1}, '#{3}')]",
2226       '$=': "[substring(@#{1}, (string-length(@#{1}) - string-length('#{3}') + 1))='#{3}']",
2227       '*=': "[contains(@#{1}, '#{3}')]",
2228       '~=': "[contains(concat(' ', @#{1}, ' '), ' #{3} ')]",
2229       '|=': "[contains(concat('-', @#{1}, '-'), '-#{3}-')]"
2230     },
2231     pseudos: {
2232       'first-child': '[not(preceding-sibling::*)]',
2233       'last-child':  '[not(following-sibling::*)]',
2234       'only-child':  '[not(preceding-sibling::* or following-sibling::*)]',
2235       'empty':       "[count(*) = 0 and (count(text()) = 0 or translate(text(), ' \t\r\n', '') = '')]",
2236       'checked':     "[@checked]",
2237       'disabled':    "[@disabled]",
2238       'enabled':     "[not(@disabled)]",
2239       'not': function(m) {
2240         var e = m[6], p = Selector.patterns,
2241             x = Selector.xpath, le, m, v;
2242
2243         var exclusion = [];
2244         while (e && le != e && (/\S/).test(e)) {
2245           le = e;
2246           for (var i in p) {
2247             if (m = e.match(p[i])) {
2248               v = typeof x[i] == 'function' ? x[i](m) : new Template(x[i]).evaluate(m);
2249               exclusion.push("(" + v.substring(1, v.length - 1) + ")");
2250               e = e.replace(m[0], '');
2251               break;
2252             }
2253           }
2254         }
2255         return "[not(" + exclusion.join(" and ") + ")]";
2256       },
2257       'nth-child':      function(m) {
2258         return Selector.xpath.pseudos.nth("(count(./preceding-sibling::*) + 1) ", m);
2259       },
2260       'nth-last-child': function(m) {
2261         return Selector.xpath.pseudos.nth("(count(./following-sibling::*) + 1) ", m);
2262       },
2263       'nth-of-type':    function(m) {
2264         return Selector.xpath.pseudos.nth("position() ", m);
2265       },
2266       'nth-last-of-type': function(m) {
2267         return Selector.xpath.pseudos.nth("(last() + 1 - position()) ", m);
2268       },
2269       'first-of-type':  function(m) {
2270         m[6] = "1"; return Selector.xpath.pseudos['nth-of-type'](m);
2271       },
2272       'last-of-type':   function(m) {
2273         m[6] = "1"; return Selector.xpath.pseudos['nth-last-of-type'](m);
2274       },
2275       'only-of-type':   function(m) {
2276         var p = Selector.xpath.pseudos; return p['first-of-type'](m) + p['last-of-type'](m);
2277       },
2278       nth: function(fragment, m) {
2279         var mm, formula = m[6], predicate;
2280         if (formula == 'even') formula = '2n+0';
2281         if (formula == 'odd')  formula = '2n+1';
2282         if (mm = formula.match(/^(\d+)$/)) // digit only
2283           return '[' + fragment + "= " + mm[1] + ']';
2284         if (mm = formula.match(/^(-?\d*)?n(([+-])(\d+))?/)) { // an+b
2285           if (mm[1] == "-") mm[1] = -1;
2286           var a = mm[1] ? Number(mm[1]) : 1;
2287           var b = mm[2] ? Number(mm[2]) : 0;
2288           predicate = "[((#{fragment} - #{b}) mod #{a} = 0) and " +
2289           "((#{fragment} - #{b}) div #{a} >= 0)]";
2290           return new Template(predicate).evaluate({
2291             fragment: fragment, a: a, b: b });
2292         }
2293       }
2294     }
2295   },
2296
2297   criteria: {
2298     tagName:      'n = h.tagName(n, r, "#{1}", c);   c = false;',
2299     className:    'n = h.className(n, r, "#{1}", c); c = false;',
2300     id:           'n = h.id(n, r, "#{1}", c);        c = false;',
2301     attrPresence: 'n = h.attrPresence(n, r, "#{1}"); c = false;',
2302     attr: function(m) {
2303       m[3] = (m[5] || m[6]);
2304       return new Template('n = h.attr(n, r, "#{1}", "#{3}", "#{2}"); c = false;').evaluate(m);
2305     },
2306     pseudo:       function(m) {
2307       if (m[6]) m[6] = m[6].replace(/"/g, '\\"');
2308       return new Template('n = h.pseudo(n, "#{1}", "#{6}", r, c); c = false;').evaluate(m);
2309     },
2310     descendant:   'c = "descendant";',
2311     child:        'c = "child";',
2312     adjacent:     'c = "adjacent";',
2313     laterSibling: 'c = "laterSibling";'
2314   },
2315
2316   patterns: {
2317     // combinators must be listed first
2318     // (and descendant needs to be last combinator)
2319     laterSibling: /^\s*~\s*/,
2320     child:        /^\s*>\s*/,
2321     adjacent:     /^\s*\+\s*/,
2322     descendant:   /^\s/,
2323
2324     // selectors follow
2325     tagName:      /^\s*(\*|[\w\-]+)(\b|$)?/,
2326     id:           /^#([\w\-\*]+)(\b|$)/,
2327     className:    /^\.([\w\-\*]+)(\b|$)/,
2328     pseudo:       /^:((first|last|nth|nth-last|only)(-child|-of-type)|empty|checked|(en|dis)abled|not)(\((.*?)\))?(\b|$|\s|(?=:))/,
2329     attrPresence: /^\[([\w]+)\]/,
2330     attr:         /\[((?:[\w-]*:)?[\w-]+)\s*(?:([!^$*~|]?=)\s*((['"])([^\]]*?)\4|([^'"][^\]]*?)))?\]/
2331   },
2332
2333   handlers: {
2334     // UTILITY FUNCTIONS
2335     // joins two collections
2336     concat: function(a, b) {
2337       for (var i = 0, node; node = b[i]; i++)
2338         a.push(node);
2339       return a;
2340     },
2341
2342     // marks an array of nodes for counting
2343     mark: function(nodes) {
2344       for (var i = 0, node; node = nodes[i]; i++)
2345         node._counted = true;
2346       return nodes;
2347     },
2348
2349     unmark: function(nodes) {
2350       for (var i = 0, node; node = nodes[i]; i++)
2351         node._counted = undefined;
2352       return nodes;
2353     },
2354
2355     // mark each child node with its position (for nth calls)
2356     // "ofType" flag indicates whether we're indexing for nth-of-type
2357     // rather than nth-child
2358     index: function(parentNode, reverse, ofType) {
2359       parentNode._counted = true;
2360       if (reverse) {
2361         for (var nodes = parentNode.childNodes, i = nodes.length - 1, j = 1; i >= 0; i--) {
2362           node = nodes[i];
2363           if (node.nodeType == 1 && (!ofType || node._counted)) node.nodeIndex = j++;
2364         }
2365       } else {
2366         for (var i = 0, j = 1, nodes = parentNode.childNodes; node = nodes[i]; i++)
2367           if (node.nodeType == 1 && (!ofType || node._counted)) node.nodeIndex = j++;
2368       }
2369     },
2370
2371     // filters out duplicates and extends all nodes
2372     unique: function(nodes) {
2373       if (nodes.length == 0) return nodes;
2374       var results = [], n;
2375       for (var i = 0, l = nodes.length; i < l; i++)
2376         if (!(n = nodes[i])._counted) {
2377           n._counted = true;
2378           results.push(Element.extend(n));
2379         }
2380       return Selector.handlers.unmark(results);
2381     },
2382
2383     // COMBINATOR FUNCTIONS
2384     descendant: function(nodes) {
2385       var h = Selector.handlers;
2386       for (var i = 0, results = [], node; node = nodes[i]; i++)
2387         h.concat(results, node.getElementsByTagName('*'));
2388       return results;
2389     },
2390
2391     child: function(nodes) {
2392       var h = Selector.handlers;
2393       for (var i = 0, results = [], node; node = nodes[i]; i++) {
2394         for (var j = 0, children = [], child; child = node.childNodes[j]; j++)
2395           if (child.nodeType == 1 && child.tagName != '!') results.push(child);
2396       }
2397       return results;
2398     },
2399
2400     adjacent: function(nodes) {
2401       for (var i = 0, results = [], node; node = nodes[i]; i++) {
2402         var next = this.nextElementSibling(node);
2403         if (next) results.push(next);
2404       }
2405       return results;
2406     },
2407
2408     laterSibling: function(nodes) {
2409       var h = Selector.handlers;
2410       for (var i = 0, results = [], node; node = nodes[i]; i++)
2411         h.concat(results, Element.nextSiblings(node));
2412       return results;
2413     },
2414
2415     nextElementSibling: function(node) {
2416       while (node = node.nextSibling)
2417               if (node.nodeType == 1) return node;
2418       return null;
2419     },
2420
2421     previousElementSibling: function(node) {
2422       while (node = node.previousSibling)
2423         if (node.nodeType == 1) return node;
2424       return null;
2425     },
2426
2427     // TOKEN FUNCTIONS
2428     tagName: function(nodes, root, tagName, combinator) {
2429       tagName = tagName.toUpperCase();
2430       var results = [], h = Selector.handlers;
2431       if (nodes) {
2432         if (combinator) {
2433           // fastlane for ordinary descendant combinators
2434           if (combinator == "descendant") {
2435             for (var i = 0, node; node = nodes[i]; i++)
2436               h.concat(results, node.getElementsByTagName(tagName));
2437             return results;
2438           } else nodes = this[combinator](nodes);
2439           if (tagName == "*") return nodes;
2440         }
2441         for (var i = 0, node; node = nodes[i]; i++)
2442           if (node.tagName.toUpperCase() == tagName) results.push(node);
2443         return results;
2444       } else return root.getElementsByTagName(tagName);
2445     },
2446
2447     id: function(nodes, root, id, combinator) {
2448       var targetNode = $(id), h = Selector.handlers;
2449       if (!nodes && root == document) return targetNode ? [targetNode] : [];
2450       if (nodes) {
2451         if (combinator) {
2452           if (combinator == 'child') {
2453             for (var i = 0, node; node = nodes[i]; i++)
2454               if (targetNode.parentNode == node) return [targetNode];
2455           } else if (combinator == 'descendant') {
2456             for (var i = 0, node; node = nodes[i]; i++)
2457               if (Element.descendantOf(targetNode, node)) return [targetNode];
2458           } else if (combinator == 'adjacent') {
2459             for (var i = 0, node; node = nodes[i]; i++)
2460               if (Selector.handlers.previousElementSibling(targetNode) == node)
2461                 return [targetNode];
2462           } else nodes = h[combinator](nodes);
2463         }
2464         for (var i = 0, node; node = nodes[i]; i++)
2465           if (node == targetNode) return [targetNode];
2466         return [];
2467       }
2468       return (targetNode && Element.descendantOf(targetNode, root)) ? [targetNode] : [];
2469     },
2470
2471     className: function(nodes, root, className, combinator) {
2472       if (nodes && combinator) nodes = this[combinator](nodes);
2473       return Selector.handlers.byClassName(nodes, root, className);
2474     },
2475
2476     byClassName: function(nodes, root, className) {
2477       if (!nodes) nodes = Selector.handlers.descendant([root]);
2478       var needle = ' ' + className + ' ';
2479       for (var i = 0, results = [], node, nodeClassName; node = nodes[i]; i++) {
2480         nodeClassName = node.className;
2481         if (nodeClassName.length == 0) continue;
2482         if (nodeClassName == className || (' ' + nodeClassName + ' ').include(needle))
2483           results.push(node);
2484       }
2485       return results;
2486     },
2487
2488     attrPresence: function(nodes, root, attr) {
2489       var results = [];
2490       for (var i = 0, node; node = nodes[i]; i++)
2491         if (Element.hasAttribute(node, attr)) results.push(node);
2492       return results;
2493     },
2494
2495     attr: function(nodes, root, attr, value, operator) {
2496       if (!nodes) nodes = root.getElementsByTagName("*");
2497       var handler = Selector.operators[operator], results = [];
2498       for (var i = 0, node; node = nodes[i]; i++) {
2499         var nodeValue = Element.readAttribute(node, attr);
2500         if (nodeValue === null) continue;
2501         if (handler(nodeValue, value)) results.push(node);
2502       }
2503       return results;
2504     },
2505
2506     pseudo: function(nodes, name, value, root, combinator) {
2507       if (nodes && combinator) nodes = this[combinator](nodes);
2508       if (!nodes) nodes = root.getElementsByTagName("*");
2509       return Selector.pseudos[name](nodes, value, root);
2510     }
2511   },
2512
2513   pseudos: {
2514     'first-child': function(nodes, value, root) {
2515       for (var i = 0, results = [], node; node = nodes[i]; i++) {
2516         if (Selector.handlers.previousElementSibling(node)) continue;
2517           results.push(node);
2518       }
2519       return results;
2520     },
2521     'last-child': function(nodes, value, root) {
2522       for (var i = 0, results = [], node; node = nodes[i]; i++) {
2523         if (Selector.handlers.nextElementSibling(node)) continue;
2524           results.push(node);
2525       }
2526       return results;
2527     },
2528     'only-child': function(nodes, value, root) {
2529       var h = Selector.handlers;
2530       for (var i = 0, results = [], node; node = nodes[i]; i++)
2531         if (!h.previousElementSibling(node) && !h.nextElementSibling(node))
2532           results.push(node);
2533       return results;
2534     },
2535     'nth-child':        function(nodes, formula, root) {
2536       return Selector.pseudos.nth(nodes, formula, root);
2537     },
2538     'nth-last-child':   function(nodes, formula, root) {
2539       return Selector.pseudos.nth(nodes, formula, root, true);
2540     },
2541     'nth-of-type':      function(nodes, formula, root) {
2542       return Selector.pseudos.nth(nodes, formula, root, false, true);
2543     },
2544     'nth-last-of-type': function(nodes, formula, root) {
2545       return Selector.pseudos.nth(nodes, formula, root, true, true);
2546     },
2547     'first-of-type':    function(nodes, formula, root) {
2548       return Selector.pseudos.nth(nodes, "1", root, false, true);
2549     },
2550     'last-of-type':     function(nodes, formula, root) {
2551       return Selector.pseudos.nth(nodes, "1", root, true, true);
2552     },
2553     'only-of-type':     function(nodes, formula, root) {
2554       var p = Selector.pseudos;
2555       return p['last-of-type'](p['first-of-type'](nodes, formula, root), formula, root);
2556     },
2557
2558     // handles the an+b logic
2559     getIndices: function(a, b, total) {
2560       if (a == 0) return b > 0 ? [b] : [];
2561       return $R(1, total).inject([], function(memo, i) {
2562         if (0 == (i - b) % a && (i - b) / a >= 0) memo.push(i);
2563         return memo;
2564       });
2565     },
2566
2567     // handles nth(-last)-child, nth(-last)-of-type, and (first|last)-of-type
2568     nth: function(nodes, formula, root, reverse, ofType) {
2569       if (nodes.length == 0) return [];
2570       if (formula == 'even') formula = '2n+0';
2571       if (formula == 'odd')  formula = '2n+1';
2572       var h = Selector.handlers, results = [], indexed = [], m;
2573       h.mark(nodes);
2574       for (var i = 0, node; node = nodes[i]; i++) {
2575         if (!node.parentNode._counted) {
2576           h.index(node.parentNode, reverse, ofType);
2577           indexed.push(node.parentNode);
2578         }
2579       }
2580       if (formula.match(/^\d+$/)) { // just a number
2581         formula = Number(formula);
2582         for (var i = 0, node; node = nodes[i]; i++)
2583           if (node.nodeIndex == formula) results.push(node);
2584       } else if (m = formula.match(/^(-?\d*)?n(([+-])(\d+))?/)) { // an+b
2585         if (m[1] == "-") m[1] = -1;
2586         var a = m[1] ? Number(m[1]) : 1;
2587         var b = m[2] ? Number(m[2]) : 0;
2588         var indices = Selector.pseudos.getIndices(a, b, nodes.length);
2589         for (var i = 0, node, l = indices.length; node = nodes[i]; i++) {
2590           for (var j = 0; j < l; j++)
2591             if (node.nodeIndex == indices[j]) results.push(node);
2592         }
2593       }
2594       h.unmark(nodes);
2595       h.unmark(indexed);
2596       return results;
2597     },
2598
2599     'empty': function(nodes, value, root) {
2600       for (var i = 0, results = [], node; node = nodes[i]; i++) {
2601         // IE treats comments as element nodes
2602         if (node.tagName == '!' || (node.firstChild && !node.innerHTML.match(/^\s*$/))) continue;
2603         results.push(node);
2604       }
2605       return results;
2606     },
2607
2608     'not': function(nodes, selector, root) {
2609       var h = Selector.handlers, selectorType, m;
2610       var exclusions = new Selector(selector).findElements(root);
2611       h.mark(exclusions);
2612       for (var i = 0, results = [], node; node = nodes[i]; i++)
2613         if (!node._counted) results.push(node);
2614       h.unmark(exclusions);
2615       return results;
2616     },
2617
2618     'enabled': function(nodes, value, root) {
2619       for (var i = 0, results = [], node; node = nodes[i]; i++)
2620         if (!node.disabled) results.push(node);
2621       return results;
2622     },
2623
2624     'disabled': function(nodes, value, root) {
2625       for (var i = 0, results = [], node; node = nodes[i]; i++)
2626         if (node.disabled) results.push(node);
2627       return results;
2628     },
2629
2630     'checked': function(nodes, value, root) {
2631       for (var i = 0, results = [], node; node = nodes[i]; i++)
2632         if (node.checked) results.push(node);
2633       return results;
2634     }
2635   },
2636
2637   operators: {
2638     '=':  function(nv, v) { return nv == v; },
2639     '!=': function(nv, v) { return nv != v; },
2640     '^=': function(nv, v) { return nv.startsWith(v); },
2641     '$=': function(nv, v) { return nv.endsWith(v); },
2642     '*=': function(nv, v) { return nv.include(v); },
2643     '~=': function(nv, v) { return (' ' + nv + ' ').include(' ' + v + ' '); },
2644     '|=': function(nv, v) { return ('-' + nv.toUpperCase() + '-').include('-' + v.toUpperCase() + '-'); }
2645   },
2646
2647   matchElements: function(elements, expression) {
2648     var matches = new Selector(expression).findElements(), h = Selector.handlers;
2649     h.mark(matches);
2650     for (var i = 0, results = [], element; element = elements[i]; i++)
2651       if (element._counted) results.push(element);
2652     h.unmark(matches);
2653     return results;
2654   },
2655
2656   findElement: function(elements, expression, index) {
2657     if (typeof expression == 'number') {
2658       index = expression; expression = false;
2659     }
2660     return Selector.matchElements(elements, expression || '*')[index || 0];
2661   },
2662
2663   findChildElements: function(element, expressions) {
2664     var exprs = expressions.join(','), expressions = [];
2665     exprs.scan(/(([\w#:.~>+()\s-]+|\*|\[.*?\])+)\s*(,|$)/, function(m) {
2666       expressions.push(m[1].strip());
2667     });
2668     var results = [], h = Selector.handlers;
2669     for (var i = 0, l = expressions.length, selector; i < l; i++) {
2670       selector = new Selector(expressions[i].strip());
2671       h.concat(results, selector.findElements(element));
2672     }
2673     return (l > 1) ? h.unique(results) : results;
2674   }
2675 });
2676
2677 function $$() {
2678   return Selector.findChildElements(document, $A(arguments));
2679 }
2680 var Form = {
2681   reset: function(form) {
2682     $(form).reset();
2683     return form;
2684   },
2685
2686   serializeElements: function(elements, getHash) {
2687     var data = elements.inject({}, function(result, element) {
2688       if (!element.disabled && element.name) {
2689         var key = element.name, value = $(element).getValue();
2690         if (value != null) {
2691                 if (key in result) {
2692             if (result[key].constructor != Array) result[key] = [result[key]];
2693             result[key].push(value);
2694           }
2695           else result[key] = value;
2696         }
2697       }
2698       return result;
2699     });
2700
2701     return getHash ? data : Hash.toQueryString(data);
2702   }
2703 };
2704
2705 Form.Methods = {
2706   serialize: function(form, getHash) {
2707     return Form.serializeElements(Form.getElements(form), getHash);
2708   },
2709
2710   getElements: function(form) {
2711     return $A($(form).getElementsByTagName('*')).inject([],
2712       function(elements, child) {
2713         if (Form.Element.Serializers[child.tagName.toLowerCase()])
2714           elements.push(Element.extend(child));
2715         return elements;
2716       }
2717     );
2718   },
2719
2720   getInputs: function(form, typeName, name) {
2721     form = $(form);
2722     var inputs = form.getElementsByTagName('input');
2723
2724     if (!typeName && !name) return $A(inputs).map(Element.extend);
2725
2726     for (var i = 0, matchingInputs = [], length = inputs.length; i < length; i++) {
2727       var input = inputs[i];
2728       if ((typeName && input.type != typeName) || (name && input.name != name))
2729         continue;
2730       matchingInputs.push(Element.extend(input));
2731     }
2732
2733     return matchingInputs;
2734   },
2735
2736   disable: function(form) {
2737     form = $(form);
2738     Form.getElements(form).invoke('disable');
2739     return form;
2740   },
2741
2742   enable: function(form) {
2743     form = $(form);
2744     Form.getElements(form).invoke('enable');
2745     return form;
2746   },
2747
2748   findFirstElement: function(form) {
2749     return $(form).getElements().find(function(element) {
2750       return element.type != 'hidden' && !element.disabled &&
2751         ['input', 'select', 'textarea'].include(element.tagName.toLowerCase());
2752     });
2753   },
2754
2755   focusFirstElement: function(form) {
2756     form = $(form);
2757     form.findFirstElement().activate();
2758     return form;
2759   },
2760
2761   request: function(form, options) {
2762     form = $(form), options = Object.clone(options || {});
2763
2764     var params = options.parameters;
2765     options.parameters = form.serialize(true);
2766
2767     if (params) {
2768       if (typeof params == 'string') params = params.toQueryParams();
2769       Object.extend(options.parameters, params);
2770     }
2771
2772     if (form.hasAttribute('method') && !options.method)
2773       options.method = form.method;
2774
2775     return new Ajax.Request(form.readAttribute('action'), options);
2776   }
2777 }
2778
2779 /*--------------------------------------------------------------------------*/
2780
2781 Form.Element = {
2782   focus: function(element) {
2783     $(element).focus();
2784     return element;
2785   },
2786
2787   select: function(element) {
2788     $(element).select();
2789     return element;
2790   }
2791 }
2792
2793 Form.Element.Methods = {
2794   serialize: function(element) {
2795     element = $(element);
2796     if (!element.disabled && element.name) {
2797       var value = element.getValue();
2798       if (value != undefined) {
2799         var pair = {};
2800         pair[element.name] = value;
2801         return Hash.toQueryString(pair);
2802       }
2803     }
2804     return '';
2805   },
2806
2807   getValue: function(element) {
2808     element = $(element);
2809     var method = element.tagName.toLowerCase();
2810     return Form.Element.Serializers[method](element);
2811   },
2812
2813   clear: function(element) {
2814     $(element).value = '';
2815     return element;
2816   },
2817
2818   present: function(element) {
2819     return $(element).value != '';
2820   },
2821
2822   activate: function(element) {
2823     element = $(element);
2824     try {
2825       element.focus();
2826       if (element.select && (element.tagName.toLowerCase() != 'input' ||
2827         !['button', 'reset', 'submit'].include(element.type)))
2828         element.select();
2829     } catch (e) {}
2830     return element;
2831   },
2832
2833   disable: function(element) {
2834     element = $(element);
2835     element.blur();
2836     element.disabled = true;
2837     return element;
2838   },
2839
2840   enable: function(element) {
2841     element = $(element);
2842     element.disabled = false;
2843     return element;
2844   }
2845 }
2846
2847 /*--------------------------------------------------------------------------*/
2848
2849 var Field = Form.Element;
2850 var $F = Form.Element.Methods.getValue;
2851
2852 /*--------------------------------------------------------------------------*/
2853
2854 Form.Element.Serializers = {
2855   input: function(element) {
2856     switch (element.type.toLowerCase()) {
2857       case 'checkbox':
2858       case 'radio':
2859         return Form.Element.Serializers.inputSelector(element);
2860       default:
2861         return Form.Element.Serializers.textarea(element);
2862     }
2863   },
2864
2865   inputSelector: function(element) {
2866     return element.checked ? element.value : null;
2867   },
2868
2869   textarea: function(element) {
2870     return element.value;
2871   },
2872
2873   select: function(element) {
2874     return this[element.type == 'select-one' ?
2875       'selectOne' : 'selectMany'](element);
2876   },
2877
2878   selectOne: function(element) {
2879     var index = element.selectedIndex;
2880     return index >= 0 ? this.optionValue(element.options[index]) : null;
2881   },
2882
2883   selectMany: function(element) {
2884     var values, length = element.length;
2885     if (!length) return null;
2886
2887     for (var i = 0, values = []; i < length; i++) {
2888       var opt = element.options[i];
2889       if (opt.selected) values.push(this.optionValue(opt));
2890     }
2891     return values;
2892   },
2893
2894   optionValue: function(opt) {
2895     // extend element because hasAttribute may not be native
2896     return Element.extend(opt).hasAttribute('value') ? opt.value : opt.text;
2897   }
2898 }
2899
2900 /*--------------------------------------------------------------------------*/
2901
2902 Abstract.TimedObserver = function() {}
2903 Abstract.TimedObserver.prototype = {
2904   initialize: function(element, frequency, callback) {
2905     this.frequency = frequency;
2906     this.element   = $(element);
2907     this.callback  = callback;
2908
2909     this.lastValue = this.getValue();
2910     this.registerCallback();
2911   },
2912
2913   registerCallback: function() {
2914     setInterval(this.onTimerEvent.bind(this), this.frequency * 1000);
2915   },
2916
2917   onTimerEvent: function() {
2918     var value = this.getValue();
2919     var changed = ('string' == typeof this.lastValue && 'string' == typeof value
2920       ? this.lastValue != value : String(this.lastValue) != String(value));
2921     if (changed) {
2922       this.callback(this.element, value);
2923       this.lastValue = value;
2924     }
2925   }
2926 }
2927
2928 Form.Element.Observer = Class.create();
2929 Form.Element.Observer.prototype = Object.extend(new Abstract.TimedObserver(), {
2930   getValue: function() {
2931     return Form.Element.getValue(this.element);
2932   }
2933 });
2934
2935 Form.Observer = Class.create();
2936 Form.Observer.prototype = Object.extend(new Abstract.TimedObserver(), {
2937   getValue: function() {
2938     return Form.serialize(this.element);
2939   }
2940 });
2941
2942 /*--------------------------------------------------------------------------*/
2943
2944 Abstract.EventObserver = function() {}
2945 Abstract.EventObserver.prototype = {
2946   initialize: function(element, callback) {
2947     this.element  = $(element);
2948     this.callback = callback;
2949
2950     this.lastValue = this.getValue();
2951     if (this.element.tagName.toLowerCase() == 'form')
2952       this.registerFormCallbacks();
2953     else
2954       this.registerCallback(this.element);
2955   },
2956
2957   onElementEvent: function() {
2958     var value = this.getValue();
2959     if (this.lastValue != value) {
2960       this.callback(this.element, value);
2961       this.lastValue = value;
2962     }
2963   },
2964
2965   registerFormCallbacks: function() {
2966     Form.getElements(this.element).each(this.registerCallback.bind(this));
2967   },
2968
2969   registerCallback: function(element) {
2970     if (element.type) {
2971       switch (element.type.toLowerCase()) {
2972         case 'checkbox':
2973         case 'radio':
2974           Event.observe(element, 'click', this.onElementEvent.bind(this));
2975           break;
2976         default:
2977           Event.observe(element, 'change', this.onElementEvent.bind(this));
2978           break;
2979       }
2980     }
2981   }
2982 }
2983
2984 Form.Element.EventObserver = Class.create();
2985 Form.Element.EventObserver.prototype = Object.extend(new Abstract.EventObserver(), {
2986   getValue: function() {
2987     return Form.Element.getValue(this.element);
2988   }
2989 });
2990
2991 Form.EventObserver = Class.create();
2992 Form.EventObserver.prototype = Object.extend(new Abstract.EventObserver(), {
2993   getValue: function() {
2994     return Form.serialize(this.element);
2995   }
2996 });
2997 if (!window.Event) {
2998   var Event = new Object();
2999 }
3000
3001 Object.extend(Event, {
3002   KEY_BACKSPACE: 8,
3003   KEY_TAB:       9,
3004   KEY_RETURN:   13,
3005   KEY_ESC:      27,
3006   KEY_LEFT:     37,
3007   KEY_UP:       38,
3008   KEY_RIGHT:    39,
3009   KEY_DOWN:     40,
3010   KEY_DELETE:   46,
3011   KEY_HOME:     36,
3012   KEY_END:      35,
3013   KEY_PAGEUP:   33,
3014   KEY_PAGEDOWN: 34,
3015
3016   element: function(event) {
3017     return $(event.target || event.srcElement);
3018   },
3019
3020   isLeftClick: function(event) {
3021     return (((event.which) && (event.which == 1)) ||
3022             ((event.button) && (event.button == 1)));
3023   },
3024
3025   pointerX: function(event) {
3026     return event.pageX || (event.clientX +
3027       (document.documentElement.scrollLeft || document.body.scrollLeft));
3028   },
3029
3030   pointerY: function(event) {
3031     return event.pageY || (event.clientY +
3032       (document.documentElement.scrollTop || document.body.scrollTop));
3033   },
3034
3035   stop: function(event) {
3036     if (event.preventDefault) {
3037       event.preventDefault();
3038       event.stopPropagation();
3039     } else {
3040       event.returnValue = false;
3041       event.cancelBubble = true;
3042     }
3043   },
3044
3045   // find the first node with the given tagName, starting from the
3046   // node the event was triggered on; traverses the DOM upwards
3047   findElement: function(event, tagName) {
3048     var element = Event.element(event);
3049     while (element.parentNode && (!element.tagName ||
3050         (element.tagName.toUpperCase() != tagName.toUpperCase())))
3051       element = element.parentNode;
3052     return element;
3053   },
3054
3055   observers: false,
3056
3057   _observeAndCache: function(element, name, observer, useCapture) {
3058     if (!this.observers) this.observers = [];
3059     if (element.addEventListener) {
3060       this.observers.push([element, name, observer, useCapture]);
3061       element.addEventListener(name, observer, useCapture);
3062     } else if (element.attachEvent) {
3063       this.observers.push([element, name, observer, useCapture]);
3064       element.attachEvent('on' + name, observer);
3065     }
3066   },
3067
3068   unloadCache: function() {
3069     if (!Event.observers) return;
3070     for (var i = 0, length = Event.observers.length; i < length; i++) {
3071       Event.stopObserving.apply(this, Event.observers[i]);
3072       Event.observers[i][0] = null;
3073     }
3074     Event.observers = false;
3075   },
3076
3077   observe: function(element, name, observer, useCapture) {
3078     element = $(element);
3079     useCapture = useCapture || false;
3080
3081     if (name == 'keypress' &&
3082       (Prototype.Browser.WebKit || element.attachEvent))
3083       name = 'keydown';
3084
3085     Event._observeAndCache(element, name, observer, useCapture);
3086   },
3087
3088   stopObserving: function(element, name, observer, useCapture) {
3089     element = $(element);
3090     useCapture = useCapture || false;
3091
3092     if (name == 'keypress' &&
3093         (Prototype.Browser.WebKit || element.attachEvent))
3094       name = 'keydown';
3095
3096     if (element.removeEventListener) {
3097       element.removeEventListener(name, observer, useCapture);
3098     } else if (element.detachEvent) {
3099       try {
3100         element.detachEvent('on' + name, observer);
3101       } catch (e) {}
3102     }
3103   }
3104 });
3105
3106 /* prevent memory leaks in IE */
3107 if (Prototype.Browser.IE)
3108   Event.observe(window, 'unload', Event.unloadCache, false);
3109 var Position = {
3110   // set to true if needed, warning: firefox performance problems
3111   // NOT neeeded for page scrolling, only if draggable contained in
3112   // scrollable elements
3113   includeScrollOffsets: false,
3114
3115   // must be called before calling withinIncludingScrolloffset, every time the
3116   // page is scrolled
3117   prepare: function() {
3118     this.deltaX =  window.pageXOffset
3119                 || document.documentElement.scrollLeft
3120                 || document.body.scrollLeft
3121                 || 0;
3122     this.deltaY =  window.pageYOffset
3123                 || document.documentElement.scrollTop
3124                 || document.body.scrollTop
3125                 || 0;
3126   },
3127
3128   realOffset: function(element) {
3129     var valueT = 0, valueL = 0;
3130     do {
3131       valueT += element.scrollTop  || 0;
3132       valueL += element.scrollLeft || 0;
3133       element = element.parentNode;
3134     } while (element);
3135     return [valueL, valueT];
3136   },
3137
3138   cumulativeOffset: function(element) {
3139     var valueT = 0, valueL = 0;
3140     do {
3141       valueT += element.offsetTop  || 0;
3142       valueL += element.offsetLeft || 0;
3143       element = element.offsetParent;
3144     } while (element);
3145     return [valueL, valueT];
3146   },
3147
3148   positionedOffset: function(element) {
3149     var valueT = 0, valueL = 0;
3150     do {
3151       valueT += element.offsetTop  || 0;
3152       valueL += element.offsetLeft || 0;
3153       element = element.offsetParent;
3154       if (element) {
3155         if(element.tagName=='BODY') break;
3156         var p = Element.getStyle(element, 'position');
3157         if (p == 'relative' || p == 'absolute') break;
3158       }
3159     } while (element);
3160     return [valueL, valueT];
3161   },
3162
3163   offsetParent: function(element) {
3164     if (element.offsetParent) return element.offsetParent;
3165     if (element == document.body) return element;
3166
3167     while ((element = element.parentNode) && element != document.body)
3168       if (Element.getStyle(element, 'position') != 'static')
3169         return element;
3170
3171     return document.body;
3172   },
3173
3174   // caches x/y coordinate pair to use with overlap
3175   within: function(element, x, y) {
3176     if (this.includeScrollOffsets)
3177       return this.withinIncludingScrolloffsets(element, x, y);
3178     this.xcomp = x;
3179     this.ycomp = y;
3180     this.offset = this.cumulativeOffset(element);
3181
3182     return (y >= this.offset[1] &&
3183             y <  this.offset[1] + element.offsetHeight &&
3184             x >= this.offset[0] &&
3185             x <  this.offset[0] + element.offsetWidth);
3186   },
3187
3188   withinIncludingScrolloffsets: function(element, x, y) {
3189     var offsetcache = this.realOffset(element);
3190
3191     this.xcomp = x + offsetcache[0] - this.deltaX;
3192     this.ycomp = y + offsetcache[1] - this.deltaY;
3193     this.offset = this.cumulativeOffset(element);
3194
3195     return (this.ycomp >= this.offset[1] &&
3196             this.ycomp <  this.offset[1] + element.offsetHeight &&
3197             this.xcomp >= this.offset[0] &&
3198             this.xcomp <  this.offset[0] + element.offsetWidth);
3199   },
3200
3201   // within must be called directly before
3202   overlap: function(mode, element) {
3203     if (!mode) return 0;
3204     if (mode == 'vertical')
3205       return ((this.offset[1] + element.offsetHeight) - this.ycomp) /
3206         element.offsetHeight;
3207     if (mode == 'horizontal')
3208       return ((this.offset[0] + element.offsetWidth) - this.xcomp) /
3209         element.offsetWidth;
3210   },
3211
3212   page: function(forElement) {
3213     var valueT = 0, valueL = 0;
3214
3215     var element = forElement;
3216     do {
3217       valueT += element.offsetTop  || 0;
3218       valueL += element.offsetLeft || 0;
3219
3220       // Safari fix
3221       if (element.offsetParent == document.body)
3222         if (Element.getStyle(element,'position')=='absolute') break;
3223
3224     } while (element = element.offsetParent);
3225
3226     element = forElement;
3227     do {
3228       if (!window.opera || element.tagName=='BODY') {
3229         valueT -= element.scrollTop  || 0;
3230         valueL -= element.scrollLeft || 0;
3231       }
3232     } while (element = element.parentNode);
3233
3234     return [valueL, valueT];
3235   },
3236
3237   clone: function(source, target) {
3238     var options = Object.extend({
3239       setLeft:    true,
3240       setTop:     true,
3241       setWidth:   true,
3242       setHeight:  true,
3243       offsetTop:  0,
3244       offsetLeft: 0
3245     }, arguments[2] || {})
3246
3247     // find page position of source
3248     source = $(source);
3249     var p = Position.page(source);
3250
3251     // find coordinate system to use
3252     target = $(target);
3253     var delta = [0, 0];
3254     var parent = null;
3255     // delta [0,0] will do fine with position: fixed elements,
3256     // position:absolute needs offsetParent deltas
3257     if (Element.getStyle(target,'position') == 'absolute') {
3258       parent = Position.offsetParent(target);
3259       delta = Position.page(parent);
3260     }
3261
3262     // correct by body offsets (fixes Safari)
3263     if (parent == document.body) {
3264       delta[0] -= document.body.offsetLeft;
3265       delta[1] -= document.body.offsetTop;
3266     }
3267
3268     // set position
3269     if(options.setLeft)   target.style.left  = (p[0] - delta[0] + options.offsetLeft) + 'px';
3270     if(options.setTop)    target.style.top   = (p[1] - delta[1] + options.offsetTop) + 'px';
3271     if(options.setWidth)  target.style.width = source.offsetWidth + 'px';
3272     if(options.setHeight) target.style.height = source.offsetHeight + 'px';
3273   },
3274
3275   absolutize: function(element) {
3276     element = $(element);
3277     if (element.style.position == 'absolute') return;
3278     Position.prepare();
3279
3280     var offsets = Position.positionedOffset(element);
3281     var top     = offsets[1];
3282     var left    = offsets[0];
3283     var width   = element.clientWidth;
3284     var height  = element.clientHeight;
3285
3286     element._originalLeft   = left - parseFloat(element.style.left  || 0);
3287     element._originalTop    = top  - parseFloat(element.style.top || 0);
3288     element._originalWidth  = element.style.width;
3289     element._originalHeight = element.style.height;
3290
3291     element.style.position = 'absolute';
3292     element.style.top    = top + 'px';
3293     element.style.left   = left + 'px';
3294     element.style.width  = width + 'px';
3295     element.style.height = height + 'px';
3296   },
3297
3298   relativize: function(element) {
3299     element = $(element);
3300     if (element.style.position == 'relative') return;
3301     Position.prepare();
3302
3303     element.style.position = 'relative';
3304     var top  = parseFloat(element.style.top  || 0) - (element._originalTop || 0);
3305     var left = parseFloat(element.style.left || 0) - (element._originalLeft || 0);
3306
3307     element.style.top    = top + 'px';
3308     element.style.left   = left + 'px';
3309     element.style.height = element._originalHeight;
3310     element.style.width  = element._originalWidth;
3311   }
3312 }
3313
3314 // Safari returns margins on body which is incorrect if the child is absolutely
3315 // positioned.  For performance reasons, redefine Position.cumulativeOffset for
3316 // KHTML/WebKit only.
3317 if (Prototype.Browser.WebKit) {
3318   Position.cumulativeOffset = function(element) {
3319     var valueT = 0, valueL = 0;
3320     do {
3321       valueT += element.offsetTop  || 0;
3322       valueL += element.offsetLeft || 0;
3323       if (element.offsetParent == document.body)
3324         if (Element.getStyle(element, 'position') == 'absolute') break;
3325
3326       element = element.offsetParent;
3327     } while (element);
3328
3329     return [valueL, valueT];
3330   }
3331 }
3332
3333 Element.addMethods();
3334
3335 ]]>
3336     </value>
3337   </data>
3338 </root>