https://www.energologia.hu/scripts/lightbox2/prototype.js

1/*  Prototype JavaScript framework, version 1.4.0
2 *  (c) 2005 Sam Stephenson <[email protected]>
3 *
4 *  THIS FILE IS AUTOMATICALLY GENERATED. When sending patches, please diff
5 *  against the source tree, available from the Prototype darcs repository.
6 *
7 *  Prototype is freely distributable under the terms of an MIT-style license.
8 *
9 *  For details, see the Prototype web site: http://prototype.conio.net/
10 *
11/*--------------------------------------------------------------------------*/
12
13var Prototype = {
14  Version: '1.4.0',
15  ScriptFragment: '(?:<script.*?>)((\n|\r|.)*?)(?:<\/script>)',
16
17  emptyFunction: function() {},
18  K: function(x) {return x}
19}
20
21var Class = {
22  create: function() {
23    return function() {
24      this.initialize.apply(this, arguments);
25    }
26  }
27}
28
29var Abstract = new Object();
30
31Object.extend = function(destination, source) {
32  for (property in source) {
33    destination[property] = source[property];
34  }
35  return destination;
36}
37
38Object.inspect = function(object) {
39  try {
40    if (object == undefined) return 'undefined';
41    if (object == null) return 'null';
42    return object.inspect ? object.inspect() : object.toString();
43  } catch (e) {
44    if (e instanceof RangeError) return '...';
45    throw e;
46  }
47}
48
49Function.prototype.bind = function() {
50  var __method = this, args = $A(arguments), object = args.shift();
51  return function() {
52    return __method.apply(object, args.concat($A(arguments)));
53  }
54}
55
56Function.prototype.bindAsEventListener = function(object) {
57  var __method = this;
58  return function(event) {
59    return __method.call(object, event || window.event);
60  }
61}
62
63Object.extend(Number.prototype, {
64  toColorPart: function() {
65    var digits = this.toString(16);
66    if (this < 16) return '0' + digits;
67    return digits;
68  },
69
70  succ: function() {
71    return this + 1;
72  },
73
74  times: function(iterator) {
75    $R(0, this, true).each(iterator);
76    return this;
77  }
78});
79
80var Try = {
81  these: function() {
82    var returnValue;
83
84    for (var i = 0; i < arguments.length; i++) {
85      var lambda = arguments[i];
86      try {
87        returnValue = lambda();
88        break;
89      } catch (e) {}
90    }
91
92    return returnValue;
93  }
94}
95
96/*--------------------------------------------------------------------------*/
97
98var PeriodicalExecuter = Class.create();
99PeriodicalExecuter.prototype = {
100  initialize: function(callback, frequency) {
101    this.callback = callback;
102    this.frequency = frequency;
103    this.currentlyExecuting = false;
104
105    this.registerCallback();
106  },
107
108  registerCallback: function() {
109    setInterval(this.onTimerEvent.bind(this), this.frequency * 1000);
110  },
111
112  onTimerEvent: function() {
113    if (!this.currentlyExecuting) {
114      try {
115        this.currentlyExecuting = true;
116        this.callback();
117      } finally {
118        this.currentlyExecuting = false;
119      }
120    }
121  }
122}
123
124/*--------------------------------------------------------------------------*/
125
126function $() {
127  var elements = new Array();
128
129  for (var i = 0; i < arguments.length; i++) {
130    var element = arguments[i];
131    if (typeof element == 'string')
132      element = document.getElementById(element);
133
134    if (arguments.length == 1)
135      return element;
136
137    elements.push(element);
138  }
139
140  return elements;
141}
142Object.extend(String.prototype, {
143  stripTags: function() {
144    return this.replace(/<\/?[^>]+>/gi, '');
145  },
146
147  stripScripts: function() {
148    return this.replace(new RegExp(Prototype.ScriptFragment, 'img'), '');
149  },
150
151  extractScripts: function() {
152    var matchAll = new RegExp(Prototype.ScriptFragment, 'img');
153    var matchOne = new RegExp(Prototype.ScriptFragment, 'im');
154    return (this.match(matchAll) || []).map(function(scriptTag) {
155      return (scriptTag.match(matchOne) || ['', ''])[1];
156    });
157  },
158
159  evalScripts: function() {
160    return this.extractScripts().map(eval);
161  },
162
163  escapeHTML: function() {
164    var div = document.createElement('div');
165    var text = document.createTextNode(this);
166    div.appendChild(text);
167    return div.innerHTML;
168  },
169
170  unescapeHTML: function() {
171    var div = document.createElement('div');
172    div.innerHTML = this.stripTags();
173    return div.childNodes[0] ? div.childNodes[0].nodeValue : '';
174  },
175
176  toQueryParams: function() {
177    var pairs = this.match(/^\??(.*)$/)[1].split('&');
178    return pairs.inject({}, function(params, pairString) {
179      var pair = pairString.split('=');
180      params[pair[0]] = pair[1];
181      return params;
182    });
183  },
184
185  toArray: function() {
186    return this.split('');
187  },
188
189  camelize: function() {
190    var oStringList = this.split('-');
191    if (oStringList.length == 1) return oStringList[0];
192
193    var camelizedString = this.indexOf('-') == 0
194      ? oStringList[0].charAt(0).toUpperCase() + oStringList[0].substring(1)
195      : oStringList[0];
196
197    for (var i = 1, len = oStringList.length; i < len; i++) {
198      var s = oStringList[i];
199      camelizedString += s.charAt(0).toUpperCase() + s.substring(1);
200    }
201
202    return camelizedString;
203  },
204
205  inspect: function() {
206    return "'" + this.replace('\\', '\\\\').replace("'", '\\\'') + "'";
207  }
208});
209
210String.prototype.parseQuery = String.prototype.toQueryParams;
211
212var $break    = new Object();
213var $continue = new Object();
214
215var Enumerable = {
216  each: function(iterator) {
217    var index = 0;
218    try {
219      this._each(function(value) {
220        try {
221          iterator(value, index++);
222        } catch (e) {
223          if (e != $continue) throw e;
224        }
225      });
226    } catch (e) {
227      if (e != $break) throw e;
228    }
229  },
230
231  all: function(iterator) {
232    var result = true;
233    this.each(function(value, index) {
234      result = result && !!(iterator || Prototype.K)(value, index);
235      if (!result) throw $break;
236    });
237    return result;
238  },
239
240  any: function(iterator) {
241    var result = true;
242    this.each(function(value, index) {
243      if (result = !!(iterator || Prototype.K)(value, index))
244        throw $break;
245    });
246    return result;
247  },
248
249  collect: function(iterator) {
250    var results = [];
251    this.each(function(value, index) {
252      results.push(iterator(value, index));
253    });
254    return results;
255  },
256
257  detect: function (iterator) {
258    var result;
259    this.each(function(value, index) {
260      if (iterator(value, index)) {
261        result = value;
262        throw $break;
263      }
264    });
265    return result;
266  },
267
268  findAll: function(iterator) {
269    var results = [];
270    this.each(function(value, index) {
271      if (iterator(value, index))
272        results.push(value);
273    });
274    return results;
275  },
276
277  grep: function(pattern, iterator) {
278    var results = [];
279    this.each(function(value, index) {
280      var stringValue = value.toString();
281      if (stringValue.match(pattern))
282        results.push((iterator || Prototype.K)(value, index));
283    })
284    return results;
285  },
286
287  include: function(object) {
288    var found = false;

289    this.each(function(value) {
290      if (value == object) {
291        found = true;
292        throw $break;
293      }
294    });
295    return found;
296  },
297
298  inject: function(memo, iterator) {
299    this.each(function(value, index) {
300      memo = iterator(memo, value, index);
301    });
302    return memo;
303  },
304
305  invoke: function(method) {
306    var args = $A(arguments).slice(1);
307    return this.collect(function(value) {
308      return value[method].apply(value, args);
309    });
310  },
311
312  max: function(iterator) {
313    var result;
314    this.each(function(value, index) {
315      value = (iterator || Prototype.K)(value, index);
316      if (value >= (result || value))
317        result = value;
318    });
319    return result;
320  },
321
322  min: function(iterator) {
323    var result;
324    this.each(function(value, index) {
325      value = (iterator || Prototype.K)(value, index);
326      if (value <= (result || value))
327        result = value;
328    });
329    return result;
330  },
331
332  partition: function(iterator) {
333    var trues = [], falses = [];
334    this.each(function(value, index) {
335      ((iterator || Prototype.K)(value, index) ?
336        trues : falses).push(value);
337    });
338    return [trues, falses];
339  },
340
341  pluck: function(property) {
342    var results = [];
343    this.each(function(value, index) {
344      results.push(value[property]);
345    });
346    return results;
347  },
348
349  reject: function(iterator) {
350    var results = [];
351    this.each(function(value, index) {
352      if (!iterator(value, index))
353        results.push(value);
354    });
355    return results;
356  },
357
358  sortBy: function(iterator) {
359    return this.collect(function(value, index) {
360      return {value: value, criteria: iterator(value, index)};
361    }).sort(function(left, right) {
362      var a = left.criteria, b = right.criteria;
363      return a < b ? -1 : a > b ? 1 : 0;
364    }).pluck('value');
365  },
366
367  toArray: function() {
368    return this.collect(Prototype.K);
369  },
370
371  zip: function() {
372    var iterator = Prototype.K, args = $A(arguments);
373    if (typeof args.last() == 'function')
374      iterator = args.pop();
375
376    var collections = [this].concat(args).map($A);
377    return this.map(function(value, index) {
378      iterator(value = collections.pluck(index));
379      return value;
380    });
381  },
382
383  inspect: function() {
384    return '#<Enumerable:' + this.toArray().inspect() + '>';
385  }
386}
387
388Object.extend(Enumerable, {
389  map:     Enumerable.collect,
390  find:    Enumerable.detect,
391  select:  Enumerable.findAll,
392  member:  Enumerable.include,
393  entries: Enumerable.toArray
394});
395var $A = Array.from = function(iterable) {
396  if (!iterable) return [];
397  if (iterable.toArray) {
398    return iterable.toArray();
399  } else {
400    var results = [];
401    for (var i = 0; i < iterable.length; i++)
402      results.push(iterable[i]);
403    return results;
404  }
405}
406
407Object.extend(Array.prototype, Enumerable);
408
409Array.prototype._reverse = Array.prototype.reverse;
410
411Object.extend(Array.prototype, {
412  _each: function(iterator) {
413    for (var i = 0; i < this.length; i++)
414      iterator(this[i]);
415  },
416
417  clear: function() {
418    this.length = 0;
419    return this;
420  },
421
422  first: function() {
423    return this[0];
424  },
425
426  last: function() {
427    return this[this.length - 1];
428  },
429
430  compact: function() {
431    return this.select(function(value) {
432      return value != undefined || value != null;
433    });
434  },
435
436  flatten: function() {
437    return this.inject([], function(array, value) {
438      return array.concat(value.constructor == Array ?
439        value.flatten() : [value]);
440    });
441  },
442
443  without: function() {
444    var values = $A(arguments);
445    return this.select(function(value) {
446      return !values.include(value);
447    });
448  },
449
450  indexOf: function(object) {
451    for (var i = 0; i < this.length; i++)
452      if (this[i] == object) return i;
453    return -1;
454  },
455
456  reverse: function(inline) {
457    return (inline !== false ? this : this.toArray())._reverse();
458  },
459
460  shift: function() {
461    var result = this[0];
462    for (var i = 0; i < this.length - 1; i++)
463      this[i] = this[i + 1];
464    this.length--;
465    return result;
466  },
467
468  inspect: function() {
469    return '[' + this.map(Object.inspect).join(', ') + ']';
470  }
471});
472var Hash = {
473  _each: function(iterator) {
474    for (key in this) {
475      var value = this[key];
476      if (typeof value == 'function') continue;
477
478      var pair = [key, value];
479      pair.key = key;
480      pair.value = value;
481      iterator(pair);
482    }
483  },
484
485  keys: function() {
486    return this.pluck('key');
487  },
488
489  values: function() {
490    return this.pluck('value');
491  },
492
493  merge: function(hash) {
494    return $H(hash).inject($H(this), function(mergedHash, pair) {
495      mergedHash[pair.key] = pair.value;
496      return mergedHash;
497    });
498  },
499
500  toQueryString: function() {
501    return this.map(function(pair) {
502      return pair.map(encodeURIComponent).join('=');
503    }).join('&');
504  },
505
506  inspect: function() {
507    return '#<Hash:{' + this.map(function(pair) {
508      return pair.map(Object.inspect).join(': ');
509    }).join(', ') + '}>';
510  }
511}
512
513function $H(object) {
514  var hash = Object.extend({}, object || {});
515  Object.extend(hash, Enumerable);
516  Object.extend(hash, Hash);
517  return hash;
518}
519ObjectRange = Class.create();
520Object.extend(ObjectRange.prototype, Enumerable);
521Object.extend(ObjectRange.prototype, {
522  initialize: function(start, end, exclusive) {
523    this.start = start;
524    this.end = end;
525    this.exclusive = exclusive;
526  },
527
528  _each: function(iterator) {
529    var value = this.start;
530    do {
531      iterator(value);
532      value = value.succ();
533    } while (this.include(value));
534  },
535
536  include: function(value) {
537    if (value < this.start)
538      return false;

539    if (this.exclusive)
540      return value < this.end;
541    return value <= this.end;
542  }
543});
544
545var $R = function(start, end, exclusive) {
546  return new ObjectRange(start, end, exclusive);
547}
548
549var Ajax = {
550  getTransport: function() {
551    return Try.these(
552      function() {return new ActiveXObject('Msxml2.XMLHTTP')},
553      function() {return new ActiveXObject('Microsoft.XMLHTTP')},
554      function() {return new XMLHttpRequest()}
555    ) || false;
556  },
557
558  activeRequestCount: 0
559}
560
561Ajax.Responders = {
562  responders: [],
563
564  _each: function(iterator) {
565    this.responders._each(iterator);
566  },
567
568  register: function(responderToAdd) {
569    if (!this.include(responderToAdd))
570      this.responders.push(responderToAdd);
571  },
572
573  unregister: function(responderToRemove) {
574    this.responders = this.responders.without(responderToRemove);
575  },
576
577  dispatch: function(callback, request, transport, json) {
578    this.each(function(responder) {
579      if (responder[callback] && typeof responder[callback] == 'function') {
580        try {
581          responder[callback].apply(responder, [request, transport, json]);
582        } catch (e) {}
583      }
584    });
585  }
586};
587
588Object.extend(Ajax.Responders, Enumerable);
589
590Ajax.Responders.register({
591  onCreate: function() {
592    Ajax.activeRequestCount++;
593  },
594
595  onComplete: function() {
596    Ajax.activeRequestCount--;
597  }
598});
599
600Ajax.Base = function() {};
601Ajax.Base.prototype = {
602  setOptions: function(options) {
603    this.options = {
604      method:       'post',
605      asynchronous: true,
606      parameters:   ''
607    }
608    Object.extend(this.options, options || {});
609  },
610
611  responseIsSuccess: function() {
612    return this.transport.status == undefined
613        || this.transport.status == 0
614        || (this.transport.status >= 200 && this.transport.status < 300);
615  },
616
617  responseIsFailure: function() {
618    return !this.responseIsSuccess();
619  }
620}
621
622Ajax.Request = Class.create();
623Ajax.Request.Events =
624  ['Uninitialized', 'Loading', 'Loaded', 'Interactive', 'Complete'];
625
626Ajax.Request.prototype = Object.extend(new Ajax.Base(), {
627  initialize: function(url, options) {
628    this.transport = Ajax.getTransport();
629    this.setOptions(options);
630    this.request(url);
631  },
632
633  request: function(url) {
634    var parameters = this.options.parameters || '';
635    if (parameters.length > 0) parameters += '&_=';
636
637    try {
638      this.url = url;
639      if (this.options.method == 'get' && parameters.length > 0)
640        this.url += (this.url.match(/\?/) ? '&' : '?') + parameters;
641
642      Ajax.Responders.dispatch('onCreate', this, this.transport);
643
644      this.transport.open(this.options.method, this.url,
645        this.options.asynchronous);
646
647      if (this.options.asynchronous) {
648        this.transport.onreadystatechange = this.onStateChange.bind(this);
649        setTimeout((function() {this.respondToReadyState(1)}).bind(this), 10);
650      }
651
652      this.setRequestHeaders();
653
654      var body = this.options.postBody ? this.options.postBody : parameters;
655      this.transport.send(this.options.method == 'post' ? body : null);
656
657    } catch (e) {
658      this.dispatchException(e);
659    }
660  },
661
662  setRequestHeaders: function() {
663    var requestHeaders =
664      ['X-Requested-With', 'XMLHttpRequest',
665       'X-Prototype-Version', Prototype.Version];
666
667    if (this.options.method == 'post') {
668      requestHeaders.push('Content-type',
669        'application/x-www-form-urlencoded');
670
671      /* Force "Connection: close" for Mozilla browsers to work around
672       * a bug where XMLHttpReqeuest sends an incorrect Content-length
673       * header. See Mozilla Bugzilla #246651.
674       */
675      if (this.transport.overrideMimeType)
676        requestHeaders.push('Connection', 'close');
677    }
678
679    if (this.options.requestHeaders)
680      requestHeaders.push.apply(requestHeaders, this.options.requestHeaders);
681
682    for (var i = 0; i < requestHeaders.length; i += 2)
683      this.transport.setRequestHeader(requestHeaders[i], requestHeaders[i+1]);
684  },
685
686  onStateChange: function() {
687    var readyState = this.transport.readyState;
688    if (readyState != 1)
689      this.respondToReadyState(this.transport.readyState);
690  },
691
692  header: function(name) {
693    try {
694      return this.transport.getResponseHeader(name);
695    } catch (e) {}
696  },
697
698  evalJSON: function() {
699    try {
700      return eval(this.header('X-JSON'));
701    } catch (e) {}
702  },
703
704  evalResponse: function() {
705    try {
706      return eval(this.transport.responseText);
707    } catch (e) {
708      this.dispatchException(e);
709    }
710  },
711
712  respondToReadyState: function(readyState) {
713    var event = Ajax.Request.Events[readyState];
714    var transport = this.transport, json = this.evalJSON();
715
716    if (event == 'Complete') {

717      try {
718        (this.options['on' + this.transport.status]
719         || this.options['on' + (this.responseIsSuccess() ? 'Success' : 'Failure')]
720         || Prototype.emptyFunction)(transport, json);
721      } catch (e) {
722        this.dispatchException(e);
723      }
724
725      if ((this.header('Content-type') || '').match(/^text\/javascript/i))
726        this.evalResponse();
727    }
728
729    try {
730      (this.options['on' + event] || Prototype.emptyFunction)(transport, json);
731      Ajax.Responders.dispatch('on' + event, this, transport, json);
732    } catch (e) {
733      this.dispatchException(e);
734    }
735
736    /* Avoid memory leak in MSIE: clean up the oncomplete event handler */
737    if (event == 'Complete')
738      this.transport.onreadystatechange = Prototype.emptyFunction;
739  },
740
741  dispatchException: function(exception) {
742    (this.options.onException || Prototype.emptyFunction)(this, exception);
743    Ajax.Responders.dispatch('onException', this, exception);
744  }
745});
746
747Ajax.Updater = Class.create();
748
749Object.extend(Object.extend(Ajax.Updater.prototype, Ajax.Request.prototype), {
750  initialize: function(container, url, options) {
751    this.containers = {
752      success: container.success ? $(container.success) : $(container),
753      failure: container.failure ? $(container.failure) :
754        (container.success ? null : $(container))
755    }
756
757    this.transport = Ajax.getTransport();
758    this.setOptions(options);
759
760    var onComplete = this.options.onComplete || Prototype.emptyFunction;
761    this.options.onComplete = (function(transport, object) {
762      this.updateContent();
763      onComplete(transport, object);
764    }).bind(this);
765
766    this.request(url);
767  },
768
769  updateContent: function() {
770    var receiver = this.responseIsSuccess() ?
771      this.containers.success : this.containers.failure;
772    var response = this.transport.responseText;
773
774    if (!this.options.evalScripts)
775      response = response.stripScripts();
776
777    if (receiver) {
778      if (this.options.insertion) {
779        new this.options.insertion(receiver, response);
780      } else {
781        Element.update(receiver, response);
782      }
783    }
784
785    if (this.responseIsSuccess()) {
786      if (this.onComplete)
787        setTimeout(this.onComplete.bind(this), 10);
788    }
789  }
790});
791

792Ajax.PeriodicalUpdater = Class.create();
793Ajax.PeriodicalUpdater.prototype = Object.extend(new Ajax.Base(), {
794  initialize: function(container, url, options) {
795    this.setOptions(options);
796    this.onComplete = this.options.onComplete;
797
798    this.frequency = (this.options.frequency || 2);
799    this.decay = (this.options.decay || 1);
800
801    this.updater = {};
802    this.container = container;
803    this.url = url;
804
805    this.start();
806  },
807
808  start: function() {
809    this.options.onComplete = this.updateComplete.bind(this);
810    this.onTimerEvent();
811  },
812
813  stop: function() {
814    this.updater.onComplete = undefined;
815    clearTimeout(this.timer);
816    (this.onComplete || Prototype.emptyFunction).apply(this, arguments);
817  },
818
819  updateComplete: function(request) {
820    if (this.options.decay) {
821      this.decay = (request.responseText == this.lastText ?
822        this.decay * this.options.decay : 1);
823
824      this.lastText = request.responseText;
825    }
826    this.timer = setTimeout(this.onTimerEvent.bind(this),
827      this.decay * this.frequency * 1000);
828  },
829
830  onTimerEvent: function() {
831    this.updater = new Ajax.Updater(this.container, this.url, this.options);
832  }
833});
834document.getElementsByClassName = function(className, parentElement) {
835  var children = ($(parentElement) || document.body).getElementsByTagName('*');
836  return $A(children).inject([], function(elements, child) {
837    if (child.className.match(new RegExp("(^|\\s)" + className + "(\\s|$)")))
838      elements.push(child);
839    return elements;
840  });
841}
842
843/*--------------------------------------------------------------------------*/
844
845if (!window.Element) {
846  var Element = new Object();
847}
848
849Object.extend(Element, {
850  visible: function(element) {
851    return $(element).style.display != 'none';
852  },
853
854  toggle: function() {
855    for (var i = 0; i < arguments.length; i++) {
856      var element = $(arguments[i]);
857      Element[Element.visible(element) ? 'hide' : 'show'](element);
858    }
859  },
860
861  hide: function() {
862    for (var i = 0; i < arguments.length; i++) {
863      var element = $(arguments[i]);
864      element.style.display = 'none';
865    }
866  },
867
868  show: function() {
869    for (var i = 0; i < arguments.length; i++) {
870      var element = $(arguments[i]);
871      element.style.display = '';
872    }
873  },
874
875  remove: function(element) {
876    element = $(element);
877    element.parentNode.removeChild(element);
878  },
879
880  update: function(element, html) {
881    $(element).innerHTML = html.stripScripts();
882    setTimeout(function() {html.evalScripts()}, 10);
883  },
884
885  getHeight: function(element) {
886    element = $(element);
887    return element.offsetHeight;
888  },
889
890  classNames: function(element) {
891    return new Element.ClassNames(element);
892  },
893
894  hasClassName: function(element, className) {
895    if (!(element = $(element))) return;
896    return Element.classNames(element).include(className);
897  },
898
899  addClassName: function(element, className) {
900    if (!(element = $(element))) return;
901    return Element.classNames(element).add(className);
902  },
903
904  removeClassName: function(element, className) {
905    if (!(element = $(element))) return;
906    return Element.classNames(element).remove(className);
907  },
908
909  // removes whitespace-only text node children
910  cleanWhitespace: function(element) {
911    element = $(element);
912    for (var i = 0; i < element.childNodes.length; i++) {
913      var node = element.childNodes[i];
914      if (node.nodeType == 3 && !/\S/.test(node.nodeValue))
915        Element.remove(node);
916    }
917  },
918
919  empty: function(element) {
920    return $(element).innerHTML.match(/^\s*$/);
921  },
922
923  scrollTo: function(element) {
924    element = $(element);
925    var x = element.x ? element.x : element.offsetLeft,
926        y = element.y ? element.y : element.offsetTop;
927    window.scrollTo(x, y);
928  },
929
930  getStyle: function(element, style) {
931    element = $(element);
932    var value = element.style[style.camelize()];
933    if (!value) {
934      if (document.defaultView && document.defaultView.getComputedStyle) {
935        var css = document.defaultView.getComputedStyle(element, null);
936        value = css ? css.getPropertyValue(style) : null;
937      } else if (element.currentStyle) {
938        value = element.currentStyle[style.camelize()];
939      }
940    }
941
942    if (window.opera && ['left', 'top', 'right', 'bottom'].include(style))
943      if (Element.getStyle(element, 'position') == 'static') value = 'auto';
944
945    return value == 'auto' ? null : value;
946  },
947
948  setStyle: function(element, style) {
949    element = $(element);
950    for (name in style)
951      element.style[name.camelize()] = style[name];
952  },
953
954  getDimensions: function(element) {
955    element = $(element);
956    if (Element.getStyle(element, 'display') != 'none')
957      return {width: element.offsetWidth, height: element.offsetHeight};
958
959    // All *Width and *Height properties give 0 on elements with display none,
960    // so enable the element temporarily
961    var els = element.style;
962    var originalVisibility = els.visibility;
963    var originalPosition = els.position;
964    els.visibility = 'hidden';
965    els.position = 'absolute';
966    els.display = '';
967    var originalWidth = element.clientWidth;
968    var originalHeight = element.clientHeight;
969    els.display = 'none';
970    els.position = originalPosition;
971    els.visibility = originalVisibility;
972    return {width: originalWidth, height: originalHeight};
973  },
974
975  makePositioned: function(element) {
976    element = $(element);
977    var pos = Element.getStyle(element, 'position');
978    if (pos == 'static' || !pos) {
979      element._madePositioned = true;
980      element.style.position = 'relative';
981      // Opera returns the offset relative to the positioning context, when an
982      // element is position relative but top and left have not been defined
983      if (window.opera) {
984        element.style.top = 0;
985        element.style.left = 0;
986      }
987    }
988  },
989
990  undoPositioned: function(element) {
991    element = $(element);
992    if (element._madePositioned) {
993      element._madePositioned = undefined;
994      element.style.position =
995        element.style.top =
996        element.style.left =
997        element.style.bottom =
998        element.style.right = '';
999    }
1000  },
1001
1002  makeClipping: function(element) {
1003    element = $(element);
1004    if (element._overflow) return;
1005    element._overflow = element.style.overflow;
1006    if ((Element.getStyle(element, 'overflow') || 'visible') != 'hidden')
1007      element.style.overflow = 'hidden';
1008  },
1009
1010  undoClipping: function(element) {
1011    element = $(element);
1012    if (element._overflow) return;
1013    element.style.overflow = element._overflow;
1014    element._overflow = undefined;
1015  }
1016});
1017
1018var Toggle = new Object();
1019Toggle.display = Element.toggle;
1020
1021/*--------------------------------------------------------------------------*/
1022
1023Abstract.Insertion = function(adjacency) {
1024  this.adjacency = adjacency;
1025}
1026
1027Abstract.Insertion.prototype = {
1028  initialize: function(element, content) {
1029    this.element = $(element);
1030    this.content = content.stripScripts();
1031
1032    if (this.adjacency && this.element.insertAdjacentHTML) {

1033      try {
1034        this.element.insertAdjacentHTML(this.adjacency, this.content);
1035      } catch (e) {
1036        if (this.element.tagName.toLowerCase() == 'tbody') {
1037          this.insertContent(this.contentFromAnonymousTable());
1038        } else {
1039          throw e;
1040        }
1041      }
1042    } else {
1043      this.range = this.element.ownerDocument.createRange();
1044      if (this.initializeRange) this.initializeRange();
1045      this.insertContent([this.range.createContextualFragment(this.content)]);
1046    }
1047
1048    setTimeout(function() {content.evalScripts()}, 10);
1049  },
1050
1051  contentFromAnonymousTable: function() {
1052    var div = document.createElement('div');
1053    div.innerHTML = '<table><tbody>' + this.content + '</tbody></table>';
1054    return $A(div.childNodes[0].childNodes[0].childNodes);
1055  }
1056}
1057
1058var Insertion = new Object();
1059
1060Insertion.Before = Class.create();
1061Insertion.Before.prototype = Object.extend(new Abstract.Insertion('beforeBegin'), {
1062  initializeRange: function() {
1063    this.range.setStartBefore(this.element);
1064  },
1065
1066  insertContent: function(fragments) {
1067    fragments.each((function(fragment) {
1068      this.element.parentNode.insertBefore(fragment, this.element);
1069    }).bind(this));
1070  }
1071});
1072
1073Insertion.Top = Class.create();
1074Insertion.Top.prototype = Object.extend(new Abstract.Insertion('afterBegin'), {
1075  initializeRange: function() {
1076    this.range.selectNodeContents(this.element);
1077    this.range.collapse(true);
1078  },
1079
1080  insertContent: function(fragments) {
1081    fragments.reverse(false).each((function(fragment) {
1082      this.element.insertBefore(fragment, this.element.firstChild);
1083    }).bind(this));
1084  }
1085});
1086
1087Insertion.Bottom = Class.create();
1088Insertion.Bottom.prototype = Object.extend(new Abstract.Insertion('beforeEnd'), {
1089  initializeRange: function() {
1090    this.range.selectNodeContents(this.element);
1091    this.range.collapse(this.element);
1092  },
1093
1094  insertContent: function(fragments) {
1095    fragments.each((function(fragment) {
1096      this.element.appendChild(fragment);
1097    }).bind(this));
1098  }
1099});
1100
1101Insertion.After = Class.create();
1102Insertion.After.prototype = Object.extend(new Abstract.Insertion('afterEnd'), {
1103  initializeRange: function() {
1104    this.range.setStartAfter(this.element);
1105  },
1106
1107  insertContent: function(fragments) {
1108    fragments.each((function(fragment) {
1109      this.element.parentNode.insertBefore(fragment,
1110        this.element.nextSibling);
1111    }).bind(this));
1112  }
1113});
1114
1115/*--------------------------------------------------------------------------*/
1116
1117Element.ClassNames = Class.create();
1118Element.ClassNames.prototype = {
1119  initialize: function(element) {
1120    this.element = $(element);
1121  },
1122
1123  _each: function(iterator) {
1124    this.element.className.split(/\s+/).select(function(name) {
1125      return name.length > 0;
1126    })._each(iterator);
1127  },
1128
1129  set: function(className) {
1130    this.element.className = className;
1131  },
1132
1133  add: function(classNameToAdd) {
1134    if (this.include(classNameToAdd)) return;
1135    this.set(this.toArray().concat(classNameToAdd).join(' '));
1136  },
1137
1138  remove: function(classNameToRemove) {
1139    if (!this.include(classNameToRemove)) return;
1140    this.set(this.select(function(className) {
1141      return className != classNameToRemove;
1142    }).join(' '));
1143  },
1144
1145  toString: function() {
1146    return this.toArray().join(' ');
1147  }
1148}
1149
1150Object.extend(Element.ClassNames.prototype, Enumerable);
1151var Field = {
1152  clear: function() {
1153    for (var i = 0; i < arguments.length; i++)
1154      $(arguments[i]).value = '';
1155  },
1156
1157  focus: function(element) {
1158    $(element).focus();
1159  },
1160
1161  present: function() {
1162    for (var i = 0; i < arguments.length; i++)
1163      if ($(arguments[i]).value == '') return false;
1164    return true;
1165  },
1166
1167  select: function(element) {
1168    $(element).select();
1169  },
1170
1171  activate: function(element) {
1172    element = $(element);
1173    element.focus();
1174    if (element.select)
1175      element.select();
1176  }
1177}
1178
1179/*--------------------------------------------------------------------------*/
1180
1181var Form = {
1182  serialize: function(form) {
1183    var elements = Form.getElements($(form));
1184    var queryComponents = new Array();
1185
1186    for (var i = 0; i < elements.length; i++) {
1187      var queryComponent = Form.Element.serialize(elements[i]);
1188      if (queryComponent)
1189        queryComponents.push(queryComponent);
1190    }
1191
1192    return queryComponents.join('&');
1193  },
1194
1195  getElements: function(form) {
1196    form = $(form);
1197    var elements = new Array();
1198
1199    for (tagName in Form.Element.Serializers) {
1200      var tagElements = form.getElementsByTagName(tagName);
1201      for (var j = 0; j < tagElements.length; j++)
1202        elements.push(tagElements[j]);
1203    }
1204    return elements;
1205  },
1206
1207  getInputs: function(form, typeName, name) {
1208    form = $(form);
1209    var inputs = form.getElementsByTagName('input');
1210
1211    if (!typeName && !name)

1212      return inputs;
1213
1214    var matchingInputs = new Array();
1215    for (var i = 0; i < inputs.length; i++) {
1216      var input = inputs[i];
1217      if ((typeName && input.type != typeName) ||
1218          (name && input.name != name))
1219        continue;
1220      matchingInputs.push(input);
1221    }
1222
1223    return matchingInputs;
1224  },
1225
1226  disable: function(form) {
1227    var elements = Form.getElements(form);
1228    for (var i = 0; i < elements.length; i++) {
1229      var element = elements[i];
1230      element.blur();
1231      element.disabled = 'true';
1232    }
1233  },
1234
1235  enable: function(form) {
1236    var elements = Form.getElements(form);
1237    for (var i = 0; i < elements.length; i++) {
1238      var element = elements[i];
1239      element.disabled = '';
1240    }
1241  },
1242
1243  findFirstElement: function(form) {
1244    return Form.getElements(form).find(function(element) {
1245      return element.type != 'hidden' && !element.disabled &&
1246        ['input', 'select', 'textarea'].include(element.tagName.toLowerCase());
1247    });
1248  },
1249
1250  focusFirstElement: function(form) {
1251    Field.activate(Form.findFirstElement(form));
1252  },
1253
1254  reset: function(form) {
1255    $(form).reset();
1256  }
1257}
1258
1259Form.Element = {
1260  serialize: function(element) {
1261    element = $(element);
1262    var method = element.tagName.toLowerCase();
1263    var parameter = Form.Element.Serializers[method](element);
1264
1265    if (parameter) {
1266      var key = encodeURIComponent(parameter[0]);
1267      if (key.length == 0) return;
1268
1269      if (parameter[1].constructor != Array)
1270        parameter[1] = [parameter[1]];
1271
1272      return parameter[1].map(function(value) {
1273        return key + '=' + encodeURIComponent(value);
1274      }).join('&');
1275    }
1276  },
1277
1278  getValue: function(element) {
1279    element = $(element);
1280    if(element == null) { return; }
1281    var method = element.tagName.toLowerCase();
1282    try {
1283	var parameter = Form.Element.Serializers[method](element);
1284    }
1285    catch(err) {
1286//	alert(err);
1287    }
1288
1289    if (parameter)
1290      return parameter[1];
1291  }
1292}
1293
1294Form.Element.Serializers = {
1295  input: function(element) {
1296    switch (element.type.toLowerCase()) {
1297      case 'submit':
1298      case 'hidden':
1299      case 'password':
1300      case 'text':
1301        return Form.Element.Serializers.textarea(element);
1302      case 'checkbox':
1303      case 'radio':
1304        return Form.Element.Serializers.inputSelector(element);
1305    }
1306    return false;
1307  },
1308
1309  inputSelector: function(element) {
1310    if (element.checked)
1311      return [element.name, element.value];
1312  },
1313
1314  textarea: function(element) {
1315    return [element.name, element.value];
1316  },
1317
1318  select: function(element) {
1319    return Form.Element.Serializers[element.type == 'select-one' ?
1320      'selectOne' : 'selectMany'](element);
1321  },
1322
1323  selectOne: function(element) {
1324    var value = '', opt, index = element.selectedIndex;
1325    if (index >= 0) {
1326      opt = element.options[index];
1327      value = opt.value;
1328      if (!value && !('value' in opt))
1329        value = opt.text;
1330    }
1331    return [element.name, value];
1332  },
1333
1334  selectMany: function(element) {
1335    var value = new Array();
1336    for (var i = 0; i < element.length; i++) {
1337      var opt = element.options[i];
1338      if (opt.selected) {
1339        var optValue = opt.value;
1340        if (!optValue && !('value' in opt))
1341          optValue = opt.text;
1342        value.push(optValue);
1343      }
1344    }
1345    return [element.name, value];
1346  }
1347}
1348
1349/*--------------------------------------------------------------------------*/
1350
1351var $F = Form.Element.getValue;
1352
1353/*--------------------------------------------------------------------------*/
1354
1355Abstract.TimedObserver = function() {}
1356Abstract.TimedObserver.prototype = {
1357  initialize: function(element, frequency, callback) {
1358    this.frequency = frequency;
1359    this.element   = $(element);
1360    this.callback  = callback;
1361
1362    this.lastValue = this.getValue();
1363    this.registerCallback();
1364  },
1365
1366  registerCallback: function() {
1367    setInterval(this.onTimerEvent.bind(this), this.frequency * 1000);
1368  },
1369
1370  onTimerEvent: function() {
1371    var value = this.getValue();
1372    if (this.lastValue != value) {
1373      this.callback(this.element, value);
1374      this.lastValue = value;
1375    }
1376  }
1377}
1378
1379Form.Element.Observer = Class.create();
1380Form.Element.Observer.prototype = Object.extend(new Abstract.TimedObserver(), {
1381  getValue: function() {
1382    return Form.Element.getValue(this.element);
1383  }
1384});
1385
1386Form.Observer = Class.create();
1387Form.Observer.prototype = Object.extend(new Abstract.TimedObserver(), {
1388  getValue: function() {
1389    return Form.serialize(this.element);
1390  }
1391});
1392
1393/*--------------------------------------------------------------------------*/
1394
1395Abstract.EventObserver = function() {}
1396Abstract.EventObserver.prototype = {
1397  initialize: function(element, callback) {
1398    this.element  = $(element);
1399    this.callback = callback;
1400
1401    this.lastValue = this.getValue();
1402    if (this.element.tagName.toLowerCase() == 'form')
1403      this.registerFormCallbacks();
1404    else
1405      this.registerCallback(this.element);
1406  },
1407
1408  onElementEvent: function() {
1409    var value = this.getValue();
1410    if (this.lastValue != value) {
1411      this.callback(this.element, value);
1412      this.lastValue = value;
1413    }
1414  },
1415
1416  registerFormCallbacks: function() {
1417    var elements = Form.getElements(this.element);
1418    for (var i = 0; i < elements.length; i++)
1419      this.registerCallback(elements[i]);
1420  },
1421
1422  registerCallback: function(element) {
1423    if (element.type) {
1424      switch (element.type.toLowerCase()) {
1425        case 'checkbox':
1426        case 'radio':
1427          Event.observe(element, 'click', this.onElementEvent.bind(this));
1428          break;
1429        case 'password':
1430        case 'text':
1431        case 'textarea':
1432        case 'select-one':
1433        case 'select-multiple':
1434          Event.observe(element, 'change', this.onElementEvent.bind(this));
1435          break;
1436      }
1437    }
1438  }
1439}
1440
1441Form.Element.EventObserver = Class.create();
1442Form.Element.EventObserver.prototype = Object.extend(new Abstract.EventObserver(), {
1443  getValue: function() {
1444    return Form.Element.getValue(this.element);
1445  }
1446});
1447
1448Form.EventObserver = Class.create();
1449Form.EventObserver.prototype = Object.extend(new Abstract.EventObserver(), {
1450  getValue: function() {
1451    return Form.serialize(this.element);
1452  }
1453});
1454if (!window.Event) {
1455  var Event = new Object();
1456}
1457
1458Object.extend(Event, {
1459  KEY_BACKSPACE: 8,
1460  KEY_TAB:       9,
1461  KEY_RETURN:   13,
1462  KEY_ESC:      27,
1463  KEY_LEFT:     37,
1464  KEY_UP:       38,
1465  KEY_RIGHT:    39,
1466  KEY_DOWN:     40,
1467  KEY_DELETE:   46,
1468
1469  element: function(event) {
1470    return event.target || event.srcElement;
1471  },
1472
1473  isLeftClick: function(event) {
1474    return (((event.which) && (event.which == 1)) ||
1475            ((event.button) && (event.button == 1)));
1476  },
1477
1478  pointerX: function(event) {
1479    return event.pageX || (event.clientX +
1480      (document.documentElement.scrollLeft || document.body.scrollLeft));
1481  },
1482
1483  pointerY: function(event) {
1484    return event.pageY || (event.clientY +
1485      (document.documentElement.scrollTop || document.body.scrollTop));
1486  },
1487
1488  stop: function(event) {
1489    if (event.preventDefault) {
1490      event.preventDefault();
1491      event.stopPropagation();
1492    } else {
1493      event.returnValue = false;

1494      event.cancelBubble = true;
1495    }
1496  },
1497
1498  // find the first node with the given tagName, starting from the
1499  // node the event was triggered on; traverses the DOM upwards
1500  findElement: function(event, tagName) {
1501    var element = Event.element(event);
1502    while (element.parentNode && (!element.tagName ||
1503        (element.tagName.toUpperCase() != tagName.toUpperCase())))
1504      element = element.parentNode;
1505    return element;
1506  },
1507
1508  observers: false,
1509
1510  _observeAndCache: function(element, name, observer, useCapture) {
1511    if (!this.observers) this.observers = [];
1512    if (element.addEventListener) {
1513      this.observers.push([element, name, observer, useCapture]);
1514      element.addEventListener(name, observer, useCapture);
1515    } else if (element.attachEvent) {
1516      this.observers.push([element, name, observer, useCapture]);
1517      element.attachEvent('on' + name, observer);
1518    }
1519  },
1520
1521  unloadCache: function() {
1522    if (!Event.observers) return;
1523    for (var i = 0; i < Event.observers.length; i++) {
1524      Event.stopObserving.apply(this, Event.observers[i]);
1525      Event.observers[i][0] = null;
1526    }
1527    Event.observers = false;
1528  },
1529
1530  observe: function(element, name, observer, useCapture) {
1531    var element = $(element);
1532    useCapture = useCapture || false;
1533
1534    if (name == 'keypress' &&
1535        (navigator.appVersion.match(/Konqueror|Safari|KHTML/)
1536        || element.attachEvent))
1537      name = 'keydown';
1538
1539    this._observeAndCache(element, name, observer, useCapture);
1540  },
1541
1542  stopObserving: function(element, name, observer, useCapture) {
1543    var element = $(element);
1544    useCapture = useCapture || false;
1545
1546    if (name == 'keypress' &&
1547        (navigator.appVersion.match(/Konqueror|Safari|KHTML/)
1548        || element.detachEvent))
1549      name = 'keydown';
1550
1551    if (element.removeEventListener) {
1552      element.removeEventListener(name, observer, useCapture);
1553    } else if (element.detachEvent) {
1554      element.detachEvent('on' + name, observer);
1555    }
1556  }
1557});
1558
1559/* prevent memory leaks in IE */
1560Event.observe(window, 'unload', Event.unloadCache, false);
1561var Position = {
1562  // set to true if needed, warning: firefox performance problems
1563  // NOT neeeded for page scrolling, only if draggable contained in
1564  // scrollable elements
1565  includeScrollOffsets: false,
1566
1567  // must be called before calling withinIncludingScrolloffset, every time the
1568  // page is scrolled
1569  prepare: function() {
1570    this.deltaX =  window.pageXOffset
1571                || document.documentElement.scrollLeft
1572                || document.body.scrollLeft
1573                || 0;
1574    this.deltaY =  window.pageYOffset
1575                || document.documentElement.scrollTop
1576                || document.body.scrollTop
1577                || 0;
1578  },
1579
1580  realOffset: function(element) {
1581    var valueT = 0, valueL = 0;
1582    do {
1583      valueT += element.scrollTop  || 0;
1584      valueL += element.scrollLeft || 0;
1585      element = element.parentNode;
1586    } while (element);
1587    return [valueL, valueT];
1588  },
1589
1590  cumulativeOffset: function(element) {
1591    var valueT = 0, valueL = 0;
1592    do {
1593      valueT += element.offsetTop  || 0;
1594      valueL += element.offsetLeft || 0;
1595      element = element.offsetParent;
1596    } while (element);
1597    return [valueL, valueT];
1598  },
1599
1600  positionedOffset: function(element) {
1601    var valueT = 0, valueL = 0;
1602    do {
1603      valueT += element.offsetTop  || 0;
1604      valueL += element.offsetLeft || 0;
1605      element = element.offsetParent;
1606      if (element) {
1607        p = Element.getStyle(element, 'position');
1608        if (p == 'relative' || p == 'absolute') break;
1609      }
1610    } while (element);
1611    return [valueL, valueT];
1612  },
1613
1614  offsetParent: function(element) {
1615    if (element.offsetParent) return element.offsetParent;
1616    if (element == document.body) return element;
1617
1618    while ((element = element.parentNode) && element != document.body)
1619      if (Element.getStyle(element, 'position') != 'static')
1620        return element;
1621
1622    return document.body;
1623  },
1624
1625  // caches x/y coordinate pair to use with overlap
1626  within: function(element, x, y) {
1627    if (this.includeScrollOffsets)
1628      return this.withinIncludingScrolloffsets(element, x, y);
1629    this.xcomp = x;
1630    this.ycomp = y;
1631    this.offset = this.cumulativeOffset(element);
1632
1633    return (y >= this.offset[1] &&
1634            y <  this.offset[1] + element.offsetHeight &&
1635            x >= this.offset[0] &&
1636            x <  this.offset[0] + element.offsetWidth);
1637  },
1638
1639  withinIncludingScrolloffsets: function(element, x, y) {
1640    var offsetcache = this.realOffset(element);
1641
1642    this.xcomp = x + offsetcache[0] - this.deltaX;
1643    this.ycomp = y + offsetcache[1] - this.deltaY;
1644    this.offset = this.cumulativeOffset(element);
1645
1646    return (this.ycomp >= this.offset[1] &&
1647            this.ycomp <  this.offset[1] + element.offsetHeight &&
1648            this.xcomp >= this.offset[0] &&
1649            this.xcomp <  this.offset[0] + element.offsetWidth);
1650  },
1651
1652  // within must be called directly before
1653  overlap: function(mode, element) {
1654    if (!mode) return 0;
1655    if (mode == 'vertical')
1656      return ((this.offset[1] + element.offsetHeight) - this.ycomp) /
1657        element.offsetHeight;
1658    if (mode == 'horizontal')
1659      return ((this.offset[0] + element.offsetWidth) - this.xcomp) /
1660        element.offsetWidth;
1661  },
1662
1663  clone: function(source, target) {
1664    source = $(source);
1665    target = $(target);
1666    target.style.position = 'absolute';
1667    var offsets = this.cumulativeOffset(source);
1668    target.style.top    = offsets[1] + 'px';
1669    target.style.left   = offsets[0] + 'px';
1670    target.style.width  = source.offsetWidth + 'px';
1671    target.style.height = source.offsetHeight + 'px';
1672  },
1673
1674  page: function(forElement) {
1675    var valueT = 0, valueL = 0;
1676
1677    var element = forElement;
1678    do {
1679      valueT += element.offsetTop  || 0;
1680      valueL += element.offsetLeft || 0;
1681
1682      // Safari fix
1683      if (element.offsetParent==document.body)
1684        if (Element.getStyle(element,'position')=='absolute') break;
1685
1686    } while (element = element.offsetParent);
1687
1688    element = forElement;
1689    do {
1690      valueT -= element.scrollTop  || 0;
1691      valueL -= element.scrollLeft || 0;
1692    } while (element = element.parentNode);
1693
1694    return [valueL, valueT];
1695  },
1696
1697  clone: function(source, target) {
1698    var options = Object.extend({
1699      setLeft:    true,
1700      setTop:     true,
1701      setWidth:   true,
1702      setHeight:  true,
1703      offsetTop:  0,
1704      offsetLeft: 0
1705    }, arguments[2] || {})
1706
1707    // find page position of source
1708    source = $(source);
1709    var p = Position.page(source);
1710
1711    // find coordinate system to use
1712    target = $(target);
1713    var delta = [0, 0];
1714    var parent = null;
1715    // delta [0,0] will do fine with position: fixed elements,
1716    // position:absolute needs offsetParent deltas
1717    if (Element.getStyle(target,'position') == 'absolute') {
1718      parent = Position.offsetParent(target);
1719      delta = Position.page(parent);
1720    }
1721
1722    // correct by body offsets (fixes Safari)
1723    if (parent == document.body) {
1724      delta[0] -= document.body.offsetLeft;
1725      delta[1] -= document.body.offsetTop;
1726    }
1727
1728    // set position
1729    if(options.setLeft)   target.style.left  = (p[0] - delta[0] + options.offsetLeft) + 'px';
1730    if(options.setTop)    target.style.top   = (p[1] - delta[1] + options.offsetTop) + 'px';
1731    if(options.setWidth)  target.style.width = source.offsetWidth + 'px';
1732    if(options.setHeight) target.style.height = source.offsetHeight + 'px';
1733  },
1734
1735  absolutize: function(element) {
1736    element = $(element);
1737    if (element.style.position == 'absolute') return;
1738    Position.prepare();
1739
1740    var offsets = Position.positionedOffset(element);
1741    var top     = offsets[1];
1742    var left    = offsets[0];
1743    var width   = element.clientWidth;
1744    var height  = element.clientHeight;
1745
1746    element._originalLeft   = left - parseFloat(element.style.left  || 0);
1747    element._originalTop    = top  - parseFloat(element.style.top || 0);
1748    element._originalWidth  = element.style.width;
1749    element._originalHeight = element.style.height;
1750
1751    element.style.position = 'absolute';
1752    element.style.top    = top + 'px';;
1753    element.style.left   = left + 'px';;
1754    element.style.width  = width + 'px';;
1755    element.style.height = height + 'px';;
1756  },
1757
1758  relativize: function(element) {
1759    element = $(element);
1760    if (element.style.position == 'relative') return;
1761    Position.prepare();
1762
1763    element.style.position = 'relative';
1764    var top  = parseFloat(element.style.top  || 0) - (element._originalTop || 0);
1765    var left = parseFloat(element.style.left || 0) - (element._originalLeft || 0);
1766
1767    element.style.top    = top + 'px';
1768    element.style.left   = left + 'px';
1769    element.style.height = element._originalHeight;
1770    element.style.width  = element._originalWidth;
1771  }
1772}
1773
1774// Safari returns margins on body which is incorrect if the child is absolutely
1775// positioned.  For performance reasons, redefine Position.cumulativeOffset for
1776// KHTML/WebKit only.
1777if (/Konqueror|Safari|KHTML/.test(navigator.userAgent)) {
1778  Position.cumulativeOffset = function(element) {
1779    var valueT = 0, valueL = 0;
1780    do {
1781      valueT += element.offsetTop  || 0;
1782      valueL += element.offsetLeft || 0;
1783      if (element.offsetParent == document.body)
1784        if (Element.getStyle(element, 'position') == 'absolute') break;
1785
1786      element = element.offsetParent;
1787    } while (element);
1788
1789    return [valueL, valueT];
1790  }
1791}