jquery ajax: closes #3052. Additional check on httpData() to keep compatibility with...
[jquery.git] / src / core.js
1 /*
2  * jQuery @VERSION - New Wave Javascript
3  *
4  * Copyright (c) 2008 John Resig (jquery.com)
5  * Dual licensed under the MIT (MIT-LICENSE.txt)
6  * and GPL (GPL-LICENSE.txt) licenses.
7  *
8  * $Date$
9  * $Rev$
10  */
11
12 // Map over jQuery in case of overwrite
13 var _jQuery = window.jQuery,
14 // Map over the $ in case of overwrite
15         _$ = window.$;
16
17 var jQuery = window.jQuery = window.$ = function( selector, context ) {
18         // The jQuery object is actually just the init constructor 'enhanced'
19         return new jQuery.fn.init( selector, context );
20 };
21
22 // A simple way to check for HTML strings or ID strings
23 // (both of which we optimize for)
24 var quickExpr = /^[^<]*(<(.|\s)+>)[^>]*$|^#([\w-]+)$/,
25
26 // Is it a simple selector
27         isSimple = /^.[^:#\[\.]*$/,
28
29 // Will speed up references to undefined, and allows munging its name.
30         undefined;
31
32 jQuery.fn = jQuery.prototype = {
33         init: function( selector, context ) {
34                 // Make sure that a selection was provided
35                 selector = selector || document;
36
37                 // Handle $(DOMElement)
38                 if ( selector.nodeType ) {
39                         this[0] = selector;
40                         this.length = 1;
41                         return this;
42                 }
43                 // Handle HTML strings
44                 if ( typeof selector == "string" ) {
45                         // Are we dealing with HTML string or an ID?
46                         var match = quickExpr.exec( selector );
47
48                         // Verify a match, and that no context was specified for #id
49                         if ( match && (match[1] || !context) ) {
50
51                                 // HANDLE: $(html) -> $(array)
52                                 if ( match[1] )
53                                         selector = jQuery.clean( [ match[1] ], context );
54
55                                 // HANDLE: $("#id")
56                                 else {
57                                         var elem = document.getElementById( match[3] );
58
59                                         // Make sure an element was located
60                                         if ( elem ){
61                                                 // Handle the case where IE and Opera return items
62                                                 // by name instead of ID
63                                                 if ( elem.id != match[3] )
64                                                         return jQuery().find( selector );
65
66                                                 // Otherwise, we inject the element directly into the jQuery object
67                                                 return jQuery( elem );
68                                         }
69                                         selector = [];
70                                 }
71
72                         // HANDLE: $(expr, [context])
73                         // (which is just equivalent to: $(content).find(expr)
74                         } else
75                                 return jQuery( context ).find( selector );
76
77                 // HANDLE: $(function)
78                 // Shortcut for document ready
79                 } else if ( jQuery.isFunction( selector ) )
80                         return jQuery( document )[ jQuery.fn.ready ? "ready" : "load" ]( selector );
81
82                 return this.setArray(jQuery.makeArray(selector));
83         },
84
85         // The current version of jQuery being used
86         jquery: "@VERSION",
87
88         // The number of elements contained in the matched element set
89         size: function() {
90                 return this.length;
91         },
92
93         // The number of elements contained in the matched element set
94         length: 0,
95
96         // Get the Nth element in the matched element set OR
97         // Get the whole matched element set as a clean array
98         get: function( num ) {
99                 return num == undefined ?
100
101                         // Return a 'clean' array
102                         jQuery.makeArray( this ) :
103
104                         // Return just the object
105                         this[ num ];
106         },
107
108         // Take an array of elements and push it onto the stack
109         // (returning the new matched element set)
110         pushStack: function( elems ) {
111                 // Build a new jQuery matched element set
112                 var ret = jQuery( elems );
113
114                 // Add the old object onto the stack (as a reference)
115                 ret.prevObject = this;
116
117                 // Return the newly-formed element set
118                 return ret;
119         },
120
121         // Force the current matched set of elements to become
122         // the specified array of elements (destroying the stack in the process)
123         // You should use pushStack() in order to do this, but maintain the stack
124         setArray: function( elems ) {
125                 // Resetting the length to 0, then using the native Array push
126                 // is a super-fast way to populate an object with array-like properties
127                 this.length = 0;
128                 Array.prototype.push.apply( this, elems );
129
130                 return this;
131         },
132
133         // Execute a callback for every element in the matched set.
134         // (You can seed the arguments with an array of args, but this is
135         // only used internally.)
136         each: function( callback, args ) {
137                 return jQuery.each( this, callback, args );
138         },
139
140         // Determine the position of an element within
141         // the matched set of elements
142         index: function( elem ) {
143                 var ret = -1;
144
145                 // Locate the position of the desired element
146                 return jQuery.inArray(
147                         // If it receives a jQuery object, the first element is used
148                         elem && elem.jquery ? elem[0] : elem
149                 , this );
150         },
151
152         attr: function( name, value, type ) {
153                 var options = name;
154
155                 // Look for the case where we're accessing a style value
156                 if ( name.constructor == String )
157                         if ( value === undefined )
158                                 return this[0] && jQuery[ type || "attr" ]( this[0], name );
159
160                         else {
161                                 options = {};
162                                 options[ name ] = value;
163                         }
164
165                 // Check to see if we're setting style values
166                 return this.each(function(i){
167                         // Set all the styles
168                         for ( name in options )
169                                 jQuery.attr(
170                                         type ?
171                                                 this.style :
172                                                 this,
173                                         name, jQuery.prop( this, options[ name ], type, i, name )
174                                 );
175                 });
176         },
177
178         css: function( key, value ) {
179                 // ignore negative width and height values
180                 if ( (key == 'width' || key == 'height') && parseFloat(value) < 0 )
181                         value = undefined;
182                 return this.attr( key, value, "curCSS" );
183         },
184
185         text: function( text ) {
186                 if ( typeof text != "object" && text != null )
187                         return this.empty().append( (this[0] && this[0].ownerDocument || document).createTextNode( text ) );
188
189                 var ret = "";
190
191                 jQuery.each( text || this, function(){
192                         jQuery.each( this.childNodes, function(){
193                                 if ( this.nodeType != 8 )
194                                         ret += this.nodeType != 1 ?
195                                                 this.nodeValue :
196                                                 jQuery.fn.text( [ this ] );
197                         });
198                 });
199
200                 return ret;
201         },
202
203         wrapAll: function( html ) {
204                 if ( this[0] )
205                         // The elements to wrap the target around
206                         jQuery( html, this[0].ownerDocument )
207                                 .clone()
208                                 .insertBefore( this[0] )
209                                 .map(function(){
210                                         var elem = this;
211
212                                         while ( elem.firstChild )
213                                                 elem = elem.firstChild;
214
215                                         return elem;
216                                 })
217                                 .append(this);
218
219                 return this;
220         },
221
222         wrapInner: function( html ) {
223                 return this.each(function(){
224                         jQuery( this ).contents().wrapAll( html );
225                 });
226         },
227
228         wrap: function( html ) {
229                 return this.each(function(){
230                         jQuery( this ).wrapAll( html );
231                 });
232         },
233
234         append: function() {
235                 return this.domManip(arguments, true, false, function(elem){
236                         if (this.nodeType == 1)
237                                 this.appendChild( elem );
238                 });
239         },
240
241         prepend: function() {
242                 return this.domManip(arguments, true, true, function(elem){
243                         if (this.nodeType == 1)
244                                 this.insertBefore( elem, this.firstChild );
245                 });
246         },
247
248         before: function() {
249                 return this.domManip(arguments, false, false, function(elem){
250                         this.parentNode.insertBefore( elem, this );
251                 });
252         },
253
254         after: function() {
255                 return this.domManip(arguments, false, true, function(elem){
256                         this.parentNode.insertBefore( elem, this.nextSibling );
257                 });
258         },
259
260         end: function() {
261                 return this.prevObject || jQuery( [] );
262         },
263
264         find: function( selector ) {
265                 var elems = jQuery.map(this, function(elem){
266                         return jQuery.find( selector, elem );
267                 });
268
269                 return this.pushStack( /[^+>] [^+>]/.test( selector ) || selector.indexOf("..") > -1 ?
270                         jQuery.unique( elems ) :
271                         elems );
272         },
273
274         clone: function( events ) {
275                 // Do the clone
276                 var ret = this.map(function(){
277                         if ( jQuery.browser.msie && !jQuery.isXMLDoc(this) ) {
278                                 // IE copies events bound via attachEvent when
279                                 // using cloneNode. Calling detachEvent on the
280                                 // clone will also remove the events from the orignal
281                                 // In order to get around this, we use innerHTML.
282                                 // Unfortunately, this means some modifications to
283                                 // attributes in IE that are actually only stored
284                                 // as properties will not be copied (such as the
285                                 // the name attribute on an input).
286                                 var clone = this.cloneNode(true),
287                                         container = document.createElement("div");
288                                 container.appendChild(clone);
289                                 return jQuery.clean([container.innerHTML])[0];
290                         } else
291                                 return this.cloneNode(true);
292                 });
293
294                 // Need to set the expando to null on the cloned set if it exists
295                 // removeData doesn't work here, IE removes it from the original as well
296                 // this is primarily for IE but the data expando shouldn't be copied over in any browser
297                 var clone = ret.find("*").andSelf().each(function(){
298                         if ( this[ expando ] != undefined )
299                                 this[ expando ] = null;
300                 });
301
302                 // Copy the events from the original to the clone
303                 if ( events === true )
304                         this.find("*").andSelf().each(function(i){
305                                 if (this.nodeType == 3)
306                                         return;
307                                 var events = jQuery.data( this, "events" );
308
309                                 for ( var type in events )
310                                         for ( var handler in events[ type ] )
311                                                 jQuery.event.add( clone[ i ], type, events[ type ][ handler ], events[ type ][ handler ].data );
312                         });
313
314                 // Return the cloned set
315                 return ret;
316         },
317
318         filter: function( selector ) {
319                 return this.pushStack(
320                         jQuery.isFunction( selector ) &&
321                         jQuery.grep(this, function(elem, i){
322                                 return selector.call( elem, i );
323                         }) ||
324
325                         jQuery.multiFilter( selector, this ) );
326         },
327
328         not: function( selector ) {
329                 if ( selector.constructor == String )
330                         // test special case where just one selector is passed in
331                         if ( isSimple.test( selector ) )
332                                 return this.pushStack( jQuery.multiFilter( selector, this, true ) );
333                         else
334                                 selector = jQuery.multiFilter( selector, this );
335
336                 var isArrayLike = selector.length && selector[selector.length - 1] !== undefined && !selector.nodeType;
337                 return this.filter(function() {
338                         return isArrayLike ? jQuery.inArray( this, selector ) < 0 : this != selector;
339                 });
340         },
341
342         add: function( selector ) {
343                 return this.pushStack( jQuery.unique( jQuery.merge(
344                         this.get(),
345                         typeof selector == 'string' ?
346                                 jQuery( selector ) :
347                                 jQuery.makeArray( selector )
348                 )));
349         },
350
351         is: function( selector ) {
352                 return !!selector && jQuery.multiFilter( selector, this ).length > 0;
353         },
354
355         hasClass: function( selector ) {
356                 return this.is( "." + selector );
357         },
358
359         val: function( value ) {
360                 if ( value == undefined ) {
361
362                         if ( this.length ) {
363                                 var elem = this[0];
364
365                                 // We need to handle select boxes special
366                                 if ( jQuery.nodeName( elem, "select" ) ) {
367                                         var index = elem.selectedIndex,
368                                                 values = [],
369                                                 options = elem.options,
370                                                 one = elem.type == "select-one";
371
372                                         // Nothing was selected
373                                         if ( index < 0 )
374                                                 return null;
375
376                                         // Loop through all the selected options
377                                         for ( var i = one ? index : 0, max = one ? index + 1 : options.length; i < max; i++ ) {
378                                                 var option = options[ i ];
379
380                                                 if ( option.selected ) {
381                                                         // Get the specifc value for the option
382                                                         value = jQuery.browser.msie && !option.attributes.value.specified ? option.text : option.value;
383
384                                                         // We don't need an array for one selects
385                                                         if ( one )
386                                                                 return value;
387
388                                                         // Multi-Selects return an array
389                                                         values.push( value );
390                                                 }
391                                         }
392
393                                         return values;
394
395                                 // Everything else, we just grab the value
396                                 } else
397                                         return (this[0].value || "").replace(/\r/g, "");
398
399                         }
400
401                         return undefined;
402                 }
403
404                 if( value.constructor == Number )
405                         value += '';
406
407                 return this.each(function(){
408                         if ( this.nodeType != 1 )
409                                 return;
410
411                         if ( value.constructor == Array && /radio|checkbox/.test( this.type ) )
412                                 this.checked = (jQuery.inArray(this.value, value) >= 0 ||
413                                         jQuery.inArray(this.name, value) >= 0);
414
415                         else if ( jQuery.nodeName( this, "select" ) ) {
416                                 var values = jQuery.makeArray(value);
417
418                                 jQuery( "option", this ).each(function(){
419                                         this.selected = (jQuery.inArray( this.value, values ) >= 0 ||
420                                                 jQuery.inArray( this.text, values ) >= 0);
421                                 });
422
423                                 if ( !values.length )
424                                         this.selectedIndex = -1;
425
426                         } else
427                                 this.value = value;
428                 });
429         },
430
431         html: function( value ) {
432                 return value == undefined ?
433                         (this[0] ?
434                                 this[0].innerHTML :
435                                 null) :
436                         this.empty().append( value );
437         },
438
439         replaceWith: function( value ) {
440                 return this.after( value ).remove();
441         },
442
443         eq: function( i ) {
444                 return this.slice( i, i + 1 );
445         },
446
447         slice: function() {
448                 return this.pushStack( Array.prototype.slice.apply( this, arguments ) );
449         },
450
451         map: function( callback ) {
452                 return this.pushStack( jQuery.map(this, function(elem, i){
453                         return callback.call( elem, i, elem );
454                 }));
455         },
456
457         andSelf: function() {
458                 return this.add( this.prevObject );
459         },
460
461         data: function( key, value ){
462                 var parts = key.split(".");
463                 parts[1] = parts[1] ? "." + parts[1] : "";
464
465                 if ( value === undefined ) {
466                         var data = this.triggerHandler("getData" + parts[1] + "!", [parts[0]]);
467
468                         if ( data === undefined && this.length )
469                                 data = jQuery.data( this[0], key );
470
471                         return data === undefined && parts[1] ?
472                                 this.data( parts[0] ) :
473                                 data;
474                 } else
475                         return this.trigger("setData" + parts[1] + "!", [parts[0], value]).each(function(){
476                                 jQuery.data( this, key, value );
477                         });
478         },
479
480         removeData: function( key ){
481                 return this.each(function(){
482                         jQuery.removeData( this, key );
483                 });
484         },
485
486         domManip: function( args, table, reverse, callback ) {
487                 var clone = this.length > 1, elems;
488
489                 return this.each(function(){
490                         if ( !elems ) {
491                                 elems = jQuery.clean( args, this.ownerDocument );
492
493                                 if ( reverse )
494                                         elems.reverse();
495                         }
496
497                         var obj = this;
498
499                         if ( table && jQuery.nodeName( this, "table" ) && jQuery.nodeName( elems[0], "tr" ) )
500                                 obj = this.getElementsByTagName("tbody")[0] || this.appendChild( this.ownerDocument.createElement("tbody") );
501
502                         var scripts = jQuery( [] );
503
504                         jQuery.each(elems, function(){
505                                 var elem = clone ?
506                                         jQuery( this ).clone( true )[0] :
507                                         this;
508
509                                 // execute all scripts after the elements have been injected
510                                 if ( jQuery.nodeName( elem, "script" ) )
511                                         scripts = scripts.add( elem );
512                                 else {
513                                         // Remove any inner scripts for later evaluation
514                                         if ( elem.nodeType == 1 )
515                                                 scripts = scripts.add( jQuery( "script", elem ).remove() );
516
517                                         // Inject the elements into the document
518                                         callback.call( obj, elem );
519                                 }
520                         });
521
522                         scripts.each( evalScript );
523                 });
524         }
525 };
526
527 // Give the init function the jQuery prototype for later instantiation
528 jQuery.fn.init.prototype = jQuery.fn;
529
530 function evalScript( i, elem ) {
531         if ( elem.src )
532                 jQuery.ajax({
533                         url: elem.src,
534                         async: false,
535                         dataType: "script"
536                 });
537
538         else
539                 jQuery.globalEval( elem.text || elem.textContent || elem.innerHTML || "" );
540
541         if ( elem.parentNode )
542                 elem.parentNode.removeChild( elem );
543 }
544
545 function now(){
546         return +new Date;
547 }
548
549 jQuery.extend = jQuery.fn.extend = function() {
550         // copy reference to target object
551         var target = arguments[0] || {}, i = 1, length = arguments.length, deep = false, options;
552
553         // Handle a deep copy situation
554         if ( target.constructor == Boolean ) {
555                 deep = target;
556                 target = arguments[1] || {};
557                 // skip the boolean and the target
558                 i = 2;
559         }
560
561         // Handle case when target is a string or something (possible in deep copy)
562         if ( typeof target != "object" && typeof target != "function" )
563                 target = {};
564
565         // extend jQuery itself if only one argument is passed
566         if ( length == i ) {
567                 target = this;
568                 --i;
569         }
570
571         for ( ; i < length; i++ )
572                 // Only deal with non-null/undefined values
573                 if ( (options = arguments[ i ]) != null )
574                         // Extend the base object
575                         for ( var name in options ) {
576                                 var src = target[ name ], copy = options[ name ];
577
578                                 // Prevent never-ending loop
579                                 if ( target === copy )
580                                         continue;
581
582                                 // Recurse if we're merging object values
583                                 if ( deep && copy && typeof copy == "object" && !copy.nodeType )
584                                         target[ name ] = jQuery.extend( deep, 
585                                                 // Never move original objects, clone them
586                                                 src || ( copy.length != null ? [ ] : { } )
587                                         , copy );
588
589                                 // Don't bring in undefined values
590                                 else if ( copy !== undefined )
591                                         target[ name ] = copy;
592
593                         }
594
595         // Return the modified object
596         return target;
597 };
598
599 var expando = "jQuery" + now(), uuid = 0, windowData = {},
600         // exclude the following css properties to add px
601         exclude = /z-?index|font-?weight|opacity|zoom|line-?height/i,
602         // cache defaultView
603         defaultView = document.defaultView || {};
604
605 jQuery.extend({
606         noConflict: function( deep ) {
607                 window.$ = _$;
608
609                 if ( deep )
610                         window.jQuery = _jQuery;
611
612                 return jQuery;
613         },
614
615         // See test/unit/core.js for details concerning this function.
616         isFunction: function( fn ) {
617                 return !!fn && typeof fn != "string" && !fn.nodeName &&
618                         fn.constructor != Array && /^[\s[]?function/.test( fn + "" );
619         },
620
621         // check if an element is in a (or is an) XML document
622         isXMLDoc: function( elem ) {
623                 return elem.documentElement && !elem.body ||
624                         elem.tagName && elem.ownerDocument && !elem.ownerDocument.body;
625         },
626
627         // Evalulates a script in a global context
628         globalEval: function( data ) {
629                 data = jQuery.trim( data );
630
631                 if ( data ) {
632                         // Inspired by code by Andrea Giammarchi
633                         // http://webreflection.blogspot.com/2007/08/global-scope-evaluation-and-dom.html
634                         var head = document.getElementsByTagName("head")[0] || document.documentElement,
635                                 script = document.createElement("script");
636
637                         script.type = "text/javascript";
638                         if ( jQuery.browser.msie )
639                                 script.text = data;
640                         else
641                                 script.appendChild( document.createTextNode( data ) );
642
643                         // Use insertBefore instead of appendChild  to circumvent an IE6 bug.
644                         // This arises when a base node is used (#2709).
645                         head.insertBefore( script, head.firstChild );
646                         head.removeChild( script );
647                 }
648         },
649
650         nodeName: function( elem, name ) {
651                 return elem.nodeName && elem.nodeName.toUpperCase() == name.toUpperCase();
652         },
653
654         cache: {},
655
656         data: function( elem, name, data ) {
657                 elem = elem == window ?
658                         windowData :
659                         elem;
660
661                 var id = elem[ expando ];
662
663                 // Compute a unique ID for the element
664                 if ( !id )
665                         id = elem[ expando ] = ++uuid;
666
667                 // Only generate the data cache if we're
668                 // trying to access or manipulate it
669                 if ( name && !jQuery.cache[ id ] )
670                         jQuery.cache[ id ] = {};
671
672                 // Prevent overriding the named cache with undefined values
673                 if ( data !== undefined )
674                         jQuery.cache[ id ][ name ] = data;
675
676                 // Return the named cache data, or the ID for the element
677                 return name ?
678                         jQuery.cache[ id ][ name ] :
679                         id;
680         },
681
682         removeData: function( elem, name ) {
683                 elem = elem == window ?
684                         windowData :
685                         elem;
686
687                 var id = elem[ expando ];
688
689                 // If we want to remove a specific section of the element's data
690                 if ( name ) {
691                         if ( jQuery.cache[ id ] ) {
692                                 // Remove the section of cache data
693                                 delete jQuery.cache[ id ][ name ];
694
695                                 // If we've removed all the data, remove the element's cache
696                                 name = "";
697
698                                 for ( name in jQuery.cache[ id ] )
699                                         break;
700
701                                 if ( !name )
702                                         jQuery.removeData( elem );
703                         }
704
705                 // Otherwise, we want to remove all of the element's data
706                 } else {
707                         // Clean up the element expando
708                         try {
709                                 delete elem[ expando ];
710                         } catch(e){
711                                 // IE has trouble directly removing the expando
712                                 // but it's ok with using removeAttribute
713                                 if ( elem.removeAttribute )
714                                         elem.removeAttribute( expando );
715                         }
716
717                         // Completely remove the data cache
718                         delete jQuery.cache[ id ];
719                 }
720         },
721
722         // args is for internal usage only
723         each: function( object, callback, args ) {
724                 var name, i = 0, length = object.length;
725
726                 if ( args ) {
727                         if ( length == undefined ) {
728                                 for ( name in object )
729                                         if ( callback.apply( object[ name ], args ) === false )
730                                                 break;
731                         } else
732                                 for ( ; i < length; )
733                                         if ( callback.apply( object[ i++ ], args ) === false )
734                                                 break;
735
736                 // A special, fast, case for the most common use of each
737                 } else {
738                         if ( length == undefined ) {
739                                 for ( name in object )
740                                         if ( callback.call( object[ name ], name, object[ name ] ) === false )
741                                                 break;
742                         } else
743                                 for ( var value = object[0];
744                                         i < length && callback.call( value, i, value ) !== false; value = object[++i] ){}
745                 }
746
747                 return object;
748         },
749
750         prop: function( elem, value, type, i, name ) {
751                 // Handle executable functions
752                 if ( jQuery.isFunction( value ) )
753                         value = value.call( elem, i );
754
755                 // Handle passing in a number to a CSS property
756                 return value && value.constructor == Number && type == "curCSS" && !exclude.test( name ) ?
757                         value + "px" :
758                         value;
759         },
760
761         className: {
762                 // internal only, use addClass("class")
763                 add: function( elem, classNames ) {
764                         jQuery.each((classNames || "").split(/\s+/), function(i, className){
765                                 if ( elem.nodeType == 1 && !jQuery.className.has( elem.className, className ) )
766                                         elem.className += (elem.className ? " " : "") + className;
767                         });
768                 },
769
770                 // internal only, use removeClass("class")
771                 remove: function( elem, classNames ) {
772                         if (elem.nodeType == 1)
773                                 elem.className = classNames != undefined ?
774                                         jQuery.grep(elem.className.split(/\s+/), function(className){
775                                                 return !jQuery.className.has( classNames, className );
776                                         }).join(" ") :
777                                         "";
778                 },
779
780                 // internal only, use hasClass("class")
781                 has: function( elem, className ) {
782                         return jQuery.inArray( className, (elem.className || elem).toString().split(/\s+/) ) > -1;
783                 }
784         },
785
786         // A method for quickly swapping in/out CSS properties to get correct calculations
787         swap: function( elem, options, callback ) {
788                 var old = {};
789                 // Remember the old values, and insert the new ones
790                 for ( var name in options ) {
791                         old[ name ] = elem.style[ name ];
792                         elem.style[ name ] = options[ name ];
793                 }
794
795                 callback.call( elem );
796
797                 // Revert the old values
798                 for ( var name in options )
799                         elem.style[ name ] = old[ name ];
800         },
801
802         css: function( elem, name, force ) {
803                 if ( name == "width" || name == "height" ) {
804                         var val, props = { position: "absolute", visibility: "hidden", display:"block" }, which = name == "width" ? [ "Left", "Right" ] : [ "Top", "Bottom" ];
805
806                         function getWH() {
807                                 val = name == "width" ? elem.offsetWidth : elem.offsetHeight;
808                                 var padding = 0, border = 0;
809                                 jQuery.each( which, function() {
810                                         padding += parseFloat(jQuery.curCSS( elem, "padding" + this, true)) || 0;
811                                         border += parseFloat(jQuery.curCSS( elem, "border" + this + "Width", true)) || 0;
812                                 });
813                                 val -= Math.round(padding + border);
814                         }
815
816                         if ( jQuery(elem).is(":visible") )
817                                 getWH();
818                         else
819                                 jQuery.swap( elem, props, getWH );
820
821                         return Math.max(0, val);
822                 }
823
824                 return jQuery.curCSS( elem, name, force );
825         },
826
827         curCSS: function( elem, name, force ) {
828                 var ret, style = elem.style;
829
830                 // A helper method for determining if an element's values are broken
831                 function color( elem ) {
832                         if ( !jQuery.browser.safari )
833                                 return false;
834
835                         // defaultView is cached
836                         var ret = defaultView.getComputedStyle( elem, null );
837                         return !ret || ret.getPropertyValue("color") == "";
838                 }
839
840                 // We need to handle opacity special in IE
841                 if ( name == "opacity" && jQuery.browser.msie ) {
842                         ret = jQuery.attr( style, "opacity" );
843
844                         return ret == "" ?
845                                 "1" :
846                                 ret;
847                 }
848                 // Opera sometimes will give the wrong display answer, this fixes it, see #2037
849                 if ( jQuery.browser.opera && name == "display" ) {
850                         var save = style.outline;
851                         style.outline = "0 solid black";
852                         style.outline = save;
853                 }
854
855                 // Make sure we're using the right name for getting the float value
856                 if ( name.match( /float/i ) )
857                         name = styleFloat;
858
859                 if ( !force && style && style[ name ] )
860                         ret = style[ name ];
861
862                 else if ( defaultView.getComputedStyle ) {
863
864                         // Only "float" is needed here
865                         if ( name.match( /float/i ) )
866                                 name = "float";
867
868                         name = name.replace( /([A-Z])/g, "-$1" ).toLowerCase();
869
870                         var computedStyle = defaultView.getComputedStyle( elem, null );
871
872                         if ( computedStyle && !color( elem ) )
873                                 ret = computedStyle.getPropertyValue( name );
874
875                         // If the element isn't reporting its values properly in Safari
876                         // then some display: none elements are involved
877                         else {
878                                 var swap = [], stack = [], a = elem, i = 0;
879
880                                 // Locate all of the parent display: none elements
881                                 for ( ; a && color(a); a = a.parentNode )
882                                         stack.unshift(a);
883
884                                 // Go through and make them visible, but in reverse
885                                 // (It would be better if we knew the exact display type that they had)
886                                 for ( ; i < stack.length; i++ )
887                                         if ( color( stack[ i ] ) ) {
888                                                 swap[ i ] = stack[ i ].style.display;
889                                                 stack[ i ].style.display = "block";
890                                         }
891
892                                 // Since we flip the display style, we have to handle that
893                                 // one special, otherwise get the value
894                                 ret = name == "display" && swap[ stack.length - 1 ] != null ?
895                                         "none" :
896                                         ( computedStyle && computedStyle.getPropertyValue( name ) ) || "";
897
898                                 // Finally, revert the display styles back
899                                 for ( i = 0; i < swap.length; i++ )
900                                         if ( swap[ i ] != null )
901                                                 stack[ i ].style.display = swap[ i ];
902                         }
903
904                         // We should always get a number back from opacity
905                         if ( name == "opacity" && ret == "" )
906                                 ret = "1";
907
908                 } else if ( elem.currentStyle ) {
909                         var camelCase = name.replace(/\-(\w)/g, function(all, letter){
910                                 return letter.toUpperCase();
911                         });
912
913                         ret = elem.currentStyle[ name ] || elem.currentStyle[ camelCase ];
914
915                         // From the awesome hack by Dean Edwards
916                         // http://erik.eae.net/archives/2007/07/27/18.54.15/#comment-102291
917
918                         // If we're not dealing with a regular pixel number
919                         // but a number that has a weird ending, we need to convert it to pixels
920                         if ( !/^\d+(px)?$/i.test( ret ) && /^\d/.test( ret ) ) {
921                                 // Remember the original values
922                                 var left = style.left, rsLeft = elem.runtimeStyle.left;
923
924                                 // Put in the new values to get a computed value out
925                                 elem.runtimeStyle.left = elem.currentStyle.left;
926                                 style.left = ret || 0;
927                                 ret = style.pixelLeft + "px";
928
929                                 // Revert the changed values
930                                 style.left = left;
931                                 elem.runtimeStyle.left = rsLeft;
932                         }
933                 }
934
935                 return ret;
936         },
937
938         clean: function( elems, context ) {
939                 var ret = [];
940                 context = context || document;
941                 // !context.createElement fails in IE with an error but returns typeof 'object'
942                 if (typeof context.createElement == 'undefined')
943                         context = context.ownerDocument || context[0] && context[0].ownerDocument || document;
944
945                 jQuery.each(elems, function(i, elem){
946                         if ( typeof elem == 'number' )
947                                 elem += '';
948
949                         if ( !elem )
950                                 return;
951
952                         // Convert html string into DOM nodes
953                         if ( typeof elem == "string" ) {
954                                 // Fix "XHTML"-style tags in all browsers
955                                 elem = elem.replace(/(<(\w+)[^>]*?)\/>/g, function(all, front, tag){
956                                         return tag.match(/^(abbr|br|col|img|input|link|meta|param|hr|area|embed)$/i) ?
957                                                 all :
958                                                 front + "></" + tag + ">";
959                                 });
960
961                                 // Trim whitespace, otherwise indexOf won't work as expected
962                                 var tags = jQuery.trim( elem ).toLowerCase(), div = context.createElement("div");
963
964                                 var wrap =
965                                         // option or optgroup
966                                         !tags.indexOf("<opt") &&
967                                         [ 1, "<select multiple='multiple'>", "</select>" ] ||
968
969                                         !tags.indexOf("<leg") &&
970                                         [ 1, "<fieldset>", "</fieldset>" ] ||
971
972                                         tags.match(/^<(thead|tbody|tfoot|colg|cap)/) &&
973                                         [ 1, "<table>", "</table>" ] ||
974
975                                         !tags.indexOf("<tr") &&
976                                         [ 2, "<table><tbody>", "</tbody></table>" ] ||
977
978                                         // <thead> matched above
979                                         (!tags.indexOf("<td") || !tags.indexOf("<th")) &&
980                                         [ 3, "<table><tbody><tr>", "</tr></tbody></table>" ] ||
981
982                                         !tags.indexOf("<col") &&
983                                         [ 2, "<table><tbody></tbody><colgroup>", "</colgroup></table>" ] ||
984
985                                         // IE can't serialize <link> and <script> tags normally
986                                         jQuery.browser.msie &&
987                                         [ 1, "div<div>", "</div>" ] ||
988
989                                         [ 0, "", "" ];
990
991                                 // Go to html and back, then peel off extra wrappers
992                                 div.innerHTML = wrap[1] + elem + wrap[2];
993
994                                 // Move to the right depth
995                                 while ( wrap[0]-- )
996                                         div = div.lastChild;
997
998                                 // Remove IE's autoinserted <tbody> from table fragments
999                                 if ( jQuery.browser.msie ) {
1000
1001                                         // String was a <table>, *may* have spurious <tbody>
1002                                         var tbody = !tags.indexOf("<table") && tags.indexOf("<tbody") < 0 ?
1003                                                 div.firstChild && div.firstChild.childNodes :
1004
1005                                                 // String was a bare <thead> or <tfoot>
1006                                                 wrap[1] == "<table>" && tags.indexOf("<tbody") < 0 ?
1007                                                         div.childNodes :
1008                                                         [];
1009
1010                                         for ( var j = tbody.length - 1; j >= 0 ; --j )
1011                                                 if ( jQuery.nodeName( tbody[ j ], "tbody" ) && !tbody[ j ].childNodes.length )
1012                                                         tbody[ j ].parentNode.removeChild( tbody[ j ] );
1013
1014                                         // IE completely kills leading whitespace when innerHTML is used
1015                                         if ( /^\s/.test( elem ) )
1016                                                 div.insertBefore( context.createTextNode( elem.match(/^\s*/)[0] ), div.firstChild );
1017
1018                                 }
1019
1020                                 elem = jQuery.makeArray( div.childNodes );
1021                         }
1022
1023                         if ( elem.length === 0 && (!jQuery.nodeName( elem, "form" ) && !jQuery.nodeName( elem, "select" )) )
1024                                 return;
1025
1026                         if ( elem[0] == undefined || jQuery.nodeName( elem, "form" ) || elem.options )
1027                                 ret.push( elem );
1028
1029                         else
1030                                 ret = jQuery.merge( ret, elem );
1031
1032                 });
1033
1034                 return ret;
1035         },
1036
1037         attr: function( elem, name, value ) {
1038                 // don't set attributes on text and comment nodes
1039                 if (!elem || elem.nodeType == 3 || elem.nodeType == 8)
1040                         return undefined;
1041
1042                 var notxml = !jQuery.isXMLDoc( elem ),
1043                         // Whether we are setting (or getting)
1044                         set = value !== undefined,
1045                         msie = jQuery.browser.msie;
1046
1047                 // Try to normalize/fix the name
1048                 name = notxml && jQuery.props[ name ] || name;
1049
1050                 // Only do all the following if this is a node (faster for style)
1051                 // IE elem.getAttribute passes even for style
1052                 if ( elem.tagName ) {
1053
1054                         // These attributes require special treatment
1055                         var special = /href|src|style/.test( name );
1056
1057                         // Safari mis-reports the default selected property of a hidden option
1058                         // Accessing the parent's selectedIndex property fixes it
1059                         if ( name == "selected" && jQuery.browser.safari )
1060                                 elem.parentNode.selectedIndex;
1061
1062                         // If applicable, access the attribute via the DOM 0 way
1063                         if ( name in elem && notxml && !special ) {
1064                                 if ( set ){
1065                                         // We can't allow the type property to be changed (since it causes problems in IE)
1066                                         if ( name == "type" && jQuery.nodeName( elem, "input" ) && elem.parentNode )
1067                                                 throw "type property can't be changed";
1068
1069                                         elem[ name ] = value;
1070                                 }
1071
1072                                 // browsers index elements by id/name on forms, give priority to attributes.
1073                                 if( jQuery.nodeName( elem, "form" ) && elem.getAttributeNode(name) )
1074                                         return elem.getAttributeNode( name ).nodeValue;
1075
1076                                 return elem[ name ];
1077                         }
1078
1079                         if ( msie && notxml &&  name == "style" )
1080                                 return jQuery.attr( elem.style, "cssText", value );
1081
1082                         if ( set )
1083                                 // convert the value to a string (all browsers do this but IE) see #1070
1084                                 elem.setAttribute( name, "" + value );
1085
1086                         var attr = msie && notxml && special
1087                                         // Some attributes require a special call on IE
1088                                         ? elem.getAttribute( name, 2 )
1089                                         : elem.getAttribute( name );
1090
1091                         // Non-existent attributes return null, we normalize to undefined
1092                         return attr === null ? undefined : attr;
1093                 }
1094
1095                 // elem is actually elem.style ... set the style
1096
1097                 // IE uses filters for opacity
1098                 if ( msie && name == "opacity" ) {
1099                         if ( set ) {
1100                                 // IE has trouble with opacity if it does not have layout
1101                                 // Force it by setting the zoom level
1102                                 elem.zoom = 1;
1103
1104                                 // Set the alpha filter to set the opacity
1105                                 elem.filter = (elem.filter || "").replace( /alpha\([^)]*\)/, "" ) +
1106                                         (parseInt( value ) + '' == "NaN" ? "" : "alpha(opacity=" + value * 100 + ")");
1107                         }
1108
1109                         return elem.filter && elem.filter.indexOf("opacity=") >= 0 ?
1110                                 (parseFloat( elem.filter.match(/opacity=([^)]*)/)[1] ) / 100) + '':
1111                                 "";
1112                 }
1113
1114                 name = name.replace(/-([a-z])/ig, function(all, letter){
1115                         return letter.toUpperCase();
1116                 });
1117
1118                 if ( set )
1119                         elem[ name ] = value;
1120
1121                 return elem[ name ];
1122         },
1123
1124         trim: function( text ) {
1125                 return (text || "").replace( /^\s+|\s+$/g, "" );
1126         },
1127
1128         makeArray: function( array ) {
1129                 var ret = [];
1130
1131                 if( array != null ){
1132                         var i = array.length;
1133                         //the window, strings and functions also have 'length'
1134                         if( i == null || array.split || array.setInterval || array.call )
1135                                 ret[0] = array;
1136                         else
1137                                 while( i )
1138                                         ret[--i] = array[i];
1139                 }
1140
1141                 return ret;
1142         },
1143
1144         inArray: function( elem, array ) {
1145                 for ( var i = 0, length = array.length; i < length; i++ )
1146                 // Use === because on IE, window == document
1147                         if ( array[ i ] === elem )
1148                                 return i;
1149
1150                 return -1;
1151         },
1152
1153         merge: function( first, second ) {
1154                 // We have to loop this way because IE & Opera overwrite the length
1155                 // expando of getElementsByTagName
1156                 var i = 0, elem, pos = first.length;
1157                 // Also, we need to make sure that the correct elements are being returned
1158                 // (IE returns comment nodes in a '*' query)
1159                 if ( jQuery.browser.msie ) {
1160                         while ( elem = second[ i++ ] )
1161                                 if ( elem.nodeType != 8 )
1162                                         first[ pos++ ] = elem;
1163
1164                 } else
1165                         while ( elem = second[ i++ ] )
1166                                 first[ pos++ ] = elem;
1167
1168                 return first;
1169         },
1170
1171         unique: function( array ) {
1172                 var ret = [], done = {};
1173
1174                 try {
1175
1176                         for ( var i = 0, length = array.length; i < length; i++ ) {
1177                                 var id = jQuery.data( array[ i ] );
1178
1179                                 if ( !done[ id ] ) {
1180                                         done[ id ] = true;
1181                                         ret.push( array[ i ] );
1182                                 }
1183                         }
1184
1185                 } catch( e ) {
1186                         ret = array;
1187                 }
1188
1189                 return ret;
1190         },
1191
1192         grep: function( elems, callback, inv ) {
1193                 var ret = [];
1194
1195                 // Go through the array, only saving the items
1196                 // that pass the validator function
1197                 for ( var i = 0, length = elems.length; i < length; i++ )
1198                         if ( !inv != !callback( elems[ i ], i ) )
1199                                 ret.push( elems[ i ] );
1200
1201                 return ret;
1202         },
1203
1204         map: function( elems, callback ) {
1205                 var ret = [];
1206
1207                 // Go through the array, translating each of the items to their
1208                 // new value (or values).
1209                 for ( var i = 0, length = elems.length; i < length; i++ ) {
1210                         var value = callback( elems[ i ], i );
1211
1212                         if ( value != null )
1213                                 ret[ ret.length ] = value;
1214                 }
1215
1216                 return ret.concat.apply( [], ret );
1217         }
1218 });
1219
1220 var userAgent = navigator.userAgent.toLowerCase();
1221
1222 // Figure out what browser is being used
1223 jQuery.browser = {
1224         version: (userAgent.match( /.+(?:rv|it|ra|ie)[\/: ]([\d.]+)/ ) || [])[1],
1225         safari: /webkit/.test( userAgent ),
1226         opera: /opera/.test( userAgent ),
1227         msie: /msie/.test( userAgent ) && !/opera/.test( userAgent ),
1228         mozilla: /mozilla/.test( userAgent ) && !/(compatible|webkit)/.test( userAgent )
1229 };
1230
1231 var styleFloat = jQuery.browser.msie ?
1232         "styleFloat" :
1233         "cssFloat";
1234
1235 jQuery.extend({
1236         // Check to see if the W3C box model is being used
1237         boxModel: !jQuery.browser.msie || document.compatMode == "CSS1Compat",
1238
1239         props: {
1240                 "for": "htmlFor",
1241                 "class": "className",
1242                 "float": styleFloat,
1243                 cssFloat: styleFloat,
1244                 styleFloat: styleFloat,
1245                 readonly: "readOnly",
1246                 maxlength: "maxLength",
1247                 cellspacing: "cellSpacing",
1248                 rowspan: "rowSpan"
1249         }
1250 });
1251
1252 jQuery.each({
1253         parent: function(elem){return elem.parentNode;},
1254         parents: function(elem){return jQuery.dir(elem,"parentNode");},
1255         next: function(elem){return jQuery.nth(elem,2,"nextSibling");},
1256         prev: function(elem){return jQuery.nth(elem,2,"previousSibling");},
1257         nextAll: function(elem){return jQuery.dir(elem,"nextSibling");},
1258         prevAll: function(elem){return jQuery.dir(elem,"previousSibling");},
1259         siblings: function(elem){return jQuery.sibling(elem.parentNode.firstChild,elem);},
1260         children: function(elem){return jQuery.sibling(elem.firstChild);},
1261         contents: function(elem){return jQuery.nodeName(elem,"iframe")?elem.contentDocument||elem.contentWindow.document:jQuery.makeArray(elem.childNodes);}
1262 }, function(name, fn){
1263         jQuery.fn[ name ] = function( selector ) {
1264                 var ret = jQuery.map( this, fn );
1265
1266                 if ( selector && typeof selector == "string" )
1267                         ret = jQuery.multiFilter( selector, ret );
1268
1269                 return this.pushStack( jQuery.unique( ret ) );
1270         };
1271 });
1272
1273 jQuery.each({
1274         appendTo: "append",
1275         prependTo: "prepend",
1276         insertBefore: "before",
1277         insertAfter: "after",
1278         replaceAll: "replaceWith"
1279 }, function(name, original){
1280         jQuery.fn[ name ] = function() {
1281                 var args = arguments;
1282
1283                 return this.each(function(){
1284                         for ( var i = 0, length = args.length; i < length; i++ )
1285                                 jQuery( args[ i ] )[ original ]( this );
1286                 });
1287         };
1288 });
1289
1290 jQuery.each({
1291         removeAttr: function( name ) {
1292                 jQuery.attr( this, name, "" );
1293                 if (this.nodeType == 1)
1294                         this.removeAttribute( name );
1295         },
1296
1297         addClass: function( classNames ) {
1298                 jQuery.className.add( this, classNames );
1299         },
1300
1301         removeClass: function( classNames ) {
1302                 jQuery.className.remove( this, classNames );
1303         },
1304
1305         toggleClass: function( classNames ) {
1306                 jQuery.className[ jQuery.className.has( this, classNames ) ? "remove" : "add" ]( this, classNames );
1307         },
1308
1309         remove: function( selector ) {
1310                 if ( !selector || jQuery.filter( selector, [ this ] ).r.length ) {
1311                         // Prevent memory leaks
1312                         jQuery( "*", this ).add(this).each(function(){
1313                                 jQuery.event.remove(this);
1314                                 jQuery.removeData(this);
1315                         });
1316                         if (this.parentNode)
1317                                 this.parentNode.removeChild( this );
1318                 }
1319         },
1320
1321         empty: function() {
1322                 // Remove element nodes and prevent memory leaks
1323                 jQuery( ">*", this ).remove();
1324
1325                 // Remove any remaining nodes
1326                 while ( this.firstChild )
1327                         this.removeChild( this.firstChild );
1328         }
1329 }, function(name, fn){
1330         jQuery.fn[ name ] = function(){
1331                 return this.each( fn, arguments );
1332         };
1333 });
1334
1335 jQuery.each([ "Height", "Width" ], function(i, name){
1336         var type = name.toLowerCase();
1337
1338         jQuery.fn[ type ] = function( size ) {
1339                 // Get window width or height
1340                 return this[0] == window ?
1341                         // Opera reports document.body.client[Width/Height] properly in both quirks and standards
1342                         jQuery.browser.opera && document.body[ "client" + name ] ||
1343
1344                         // Safari reports inner[Width/Height] just fine (Mozilla and Opera include scroll bar widths)
1345                         jQuery.browser.safari && window[ "inner" + name ] ||
1346
1347                         // Everyone else use document.documentElement or document.body depending on Quirks vs Standards mode
1348                         document.compatMode == "CSS1Compat" && document.documentElement[ "client" + name ] || document.body[ "client" + name ] :
1349
1350                         // Get document width or height
1351                         this[0] == document ?
1352                                 // Either scroll[Width/Height] or offset[Width/Height], whichever is greater
1353                                 Math.max(
1354                                         Math.max(document.body["scroll" + name], document.documentElement["scroll" + name]),
1355                                         Math.max(document.body["offset" + name], document.documentElement["offset" + name])
1356                                 ) :
1357
1358                                 // Get or set width or height on the element
1359                                 size == undefined ?
1360                                         // Get width or height on the element
1361                                         (this.length ? jQuery.css( this[0], type ) : null) :
1362
1363                                         // Set the width or height on the element (default to pixels if value is unitless)
1364                                         this.css( type, size.constructor == String ? size : size + "px" );
1365         };
1366 });
1367
1368 // Helper function used by the dimensions and offset modules
1369 function num(elem, prop) {
1370         return elem[0] && parseInt( jQuery.curCSS(elem[0], prop, true), 10 ) || 0;
1371 }