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