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.length && jQuery[ type || "attr" ]( this[0], name ) || undefined;
 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                 return this.each(function(){
 405                         if ( this.nodeType != 1 )
 406                                 return;
 407
 408                         if ( value.constructor == Array && /radio|checkbox/.test( this.type ) )
 409                                 this.checked = (jQuery.inArray(this.value, value) >= 0 ||
 410                                         jQuery.inArray(this.name, value) >= 0);
 411
 412                         else if ( jQuery.nodeName( this, "select" ) ) {
 413                                 var values = value.constructor == Array ?
 414                                         value :
 415                                         [ value ];
 416
 417                                 jQuery( "option", this ).each(function(){
 418                                         this.selected = (jQuery.inArray( this.value, values ) >= 0 ||
 419                                                 jQuery.inArray( this.text, values ) >= 0);
 420                                 });
 421
 422                                 if ( !values.length )
 423                                         this.selectedIndex = -1;
 424
 425                         } else
 426                                 this.value = value;
 427                 });
 428         },
 429
 430         html: function( value ) {
 431                 return value == undefined ?
 432                         (this.length ?
 433                                 this[0].innerHTML :
 434                                 null) :
 435                         this.empty().append( value );
 436         },
 437
 438         replaceWith: function( value ) {
 439                 return this.after( value ).remove();
 440         },
 441
 442         eq: function( i ) {
 443                 return this.slice( i, i + 1 );
 444         },
 445
 446         slice: function() {
 447                 return this.pushStack( Array.prototype.slice.apply( this, arguments ) );
 448         },
 449
 450         map: function( callback ) {
 451                 return this.pushStack( jQuery.map(this, function(elem, i){
 452                         return callback.call( elem, i, elem );
 453                 }));
 454         },
 455
 456         andSelf: function() {
 457                 return this.add( this.prevObject );
 458         },
 459
 460         data: function( key, value ){
 461                 var parts = key.split(".");
 462                 parts[1] = parts[1] ? "." + parts[1] : "";
 463
 464                 if ( value === undefined ) {
 465                         var data = this.triggerHandler("getData" + parts[1] + "!", [parts[0]]);
 466
 467                         if ( data === undefined && this.length )
 468                                 data = jQuery.data( this[0], key );
 469
 470                         return data === undefined && parts[1] ?
 471                                 this.data( parts[0] ) :
 472                                 data;
 473                 } else
 474                         return this.trigger("setData" + parts[1] + "!", [parts[0], value]).each(function(){
 475                                 jQuery.data( this, key, value );
 476                         });
 477         },
 478
 479         removeData: function( key ){
 480                 return this.each(function(){
 481                         jQuery.removeData( this, key );
 482                 });
 483         },
 484
 485         domManip: function( args, table, reverse, callback ) {
 486                 var clone = this.length > 1, elems;
 487
 488                 return this.each(function(){
 489                         if ( !elems ) {
 490                                 elems = jQuery.clean( args, this.ownerDocument );
 491
 492                                 if ( reverse )
 493                                         elems.reverse();
 494                         }
 495
 496                         var obj = this;
 497
 498                         if ( table && jQuery.nodeName( this, "table" ) && jQuery.nodeName( elems[0], "tr" ) )
 499                                 obj = this.getElementsByTagName("tbody")[0] || this.appendChild( this.ownerDocument.createElement("tbody") );
 500
 501                         var scripts = jQuery( [] );
 502
 503                         jQuery.each(elems, function(){
 504                                 var elem = clone ?
 505                                         jQuery( this ).clone( true )[0] :
 506                                         this;
 507
 508                                 // execute all scripts after the elements have been injected
 509                                 if ( jQuery.nodeName( elem, "script" ) ) {
 510                                         scripts = scripts.add( elem );
 511                                 } else {
 512                                         // Remove any inner scripts for later evaluation
 513                                         if ( elem.nodeType == 1 )
 514                                                 scripts = scripts.add( jQuery( "script", elem ).remove() );
 515
 516                                         // Inject the elements into the document
 517                                         callback.call( obj, elem );
 518                                 }
 519                         });
 520
 521                         scripts.each( evalScript );
 522                 });
 523         }
 524 };
 525
 526 // Give the init function the jQuery prototype for later instantiation
 527 jQuery.fn.init.prototype = jQuery.fn;
 528
 529 function evalScript( i, elem ) {
 530         if ( elem.src )
 531                 jQuery.ajax({
 532                         url: elem.src,
 533                         async: false,
 534                         dataType: "script"
 535                 });
 536
 537         else
 538                 jQuery.globalEval( elem.text || elem.textContent || elem.innerHTML || "" );
 539
 540         if ( elem.parentNode )
 541                 elem.parentNode.removeChild( elem );
 542 }
 543
 544 function now(){
 545         return +new Date;
 546 }
 547
 548 jQuery.extend = jQuery.fn.extend = function() {
 549         // copy reference to target object
 550         var target = arguments[0] || {}, i = 1, length = arguments.length, deep = false, options;
 551
 552         // Handle a deep copy situation
 553         if ( target.constructor == Boolean ) {
 554                 deep = target;
 555                 target = arguments[1] || {};
 556                 // skip the boolean and the target
 557                 i = 2;
 558         }
 559
 560         // Handle case when target is a string or something (possible in deep copy)
 561         if ( typeof target != "object" && typeof target != "function" )
 562                 target = {};
 563
 564         // extend jQuery itself if only one argument is passed
 565         if ( length == i ) {
 566                 target = this;
 567                 --i;
 568         }
 569
 570         for ( ; i < length; i++ )
 571                 // Only deal with non-null/undefined values
 572                 if ( (options = arguments[ i ]) != null )
 573                         // Extend the base object
 574                         for ( var name in options ) {
 575                                 var src = target[ name ], copy = options[ name ];
 576
 577                                 // Prevent never-ending loop
 578                                 if ( target === copy )
 579                                         continue;
 580
 581                                 // Recurse if we're merging object values
 582                                 if ( deep && copy && typeof copy == "object" && src && !copy.nodeType )
 583                                         target[ name ] = jQuery.extend( deep, src, copy );
 584
 585                                 // Don't bring in undefined values
 586                                 else if ( copy !== undefined )
 587                                         target[ name ] = copy;
 588
 589                         }
 590
 591         // Return the modified object
 592         return target;
 593 };
 594
 595 var expando = "jQuery" + now(), uuid = 0, windowData = {},
 596
 597 // exclude the following css properties to add px
 598         exclude = /z-?index|font-?weight|opacity|zoom|line-?height/i,
 599 // cache getComputedStyle
 600         getComputedStyle = document.defaultView && document.defaultView.getComputedStyle;
 601
 602 jQuery.extend({
 603         noConflict: function( deep ) {
 604                 window.$ = _$;
 605
 606                 if ( deep )
 607                         window.jQuery = _jQuery;
 608
 609                 return jQuery;
 610         },
 611
 612         // See test/unit/core.js for details concerning this function.
 613         isFunction: function( fn ) {
 614                 return !!fn && typeof fn != "string" && !fn.nodeName &&
 615                         fn.constructor != Array && /function/i.test( fn + "" );
 616         },
 617
 618         // check if an element is in a (or is an) XML document
 619         isXMLDoc: function( elem ) {
 620                 return elem.documentElement && !elem.body ||
 621                         elem.tagName && elem.ownerDocument && !elem.ownerDocument.body;
 622         },
 623
 624         // Evalulates a script in a global context
 625         globalEval: function( data ) {
 626                 data = jQuery.trim( data );
 627
 628                 if ( data ) {
 629                         // Inspired by code by Andrea Giammarchi
 630                         // http://webreflection.blogspot.com/2007/08/global-scope-evaluation-and-dom.html
 631                         var head = document.getElementsByTagName("head")[0] || document.documentElement,
 632                                 script = document.createElement("script");
 633
 634                         script.type = "text/javascript";
 635                         if ( jQuery.browser.msie )
 636                                 script.text = data;
 637                         else
 638                                 script.appendChild( document.createTextNode( data ) );
 639
 640                         head.appendChild( script );
 641                         head.removeChild( script );
 642                 }
 643         },
 644
 645         nodeName: function( elem, name ) {
 646                 return elem.nodeName && elem.nodeName.toUpperCase() == name.toUpperCase();
 647         },
 648
 649         cache: {},
 650
 651         data: function( elem, name, data ) {
 652                 elem = elem == window ?
 653                         windowData :
 654                         elem;
 655
 656                 var id = elem[ expando ];
 657
 658                 // Compute a unique ID for the element
 659                 if ( !id )
 660                         id = elem[ expando ] = ++uuid;
 661
 662                 // Only generate the data cache if we're
 663                 // trying to access or manipulate it
 664                 if ( name && !jQuery.cache[ id ] )
 665                         jQuery.cache[ id ] = {};
 666
 667                 // Prevent overriding the named cache with undefined values
 668                 if ( data !== undefined )
 669                         jQuery.cache[ id ][ name ] = data;
 670
 671                 // Return the named cache data, or the ID for the element
 672                 return name ?
 673                         jQuery.cache[ id ][ name ] :
 674                         id;
 675         },
 676
 677         removeData: function( elem, name ) {
 678                 elem = elem == window ?
 679                         windowData :
 680                         elem;
 681
 682                 var id = elem[ expando ];
 683
 684                 // If we want to remove a specific section of the element's data
 685                 if ( name ) {
 686                         if ( jQuery.cache[ id ] ) {
 687                                 // Remove the section of cache data
 688                                 delete jQuery.cache[ id ][ name ];
 689
 690                                 // If we've removed all the data, remove the element's cache
 691                                 name = "";
 692
 693                                 for ( name in jQuery.cache[ id ] )
 694                                         break;
 695
 696                                 if ( !name )
 697                                         jQuery.removeData( elem );
 698                         }
 699
 700                 // Otherwise, we want to remove all of the element's data
 701                 } else {
 702                         // Clean up the element expando
 703                         try {
 704                                 delete elem[ expando ];
 705                         } catch(e){
 706                                 // IE has trouble directly removing the expando
 707                                 // but it's ok with using removeAttribute
 708                                 if ( elem.removeAttribute )
 709                                         elem.removeAttribute( expando );
 710                         }
 711
 712                         // Completely remove the data cache
 713                         delete jQuery.cache[ id ];
 714                 }
 715         },
 716
 717         // args is for internal usage only
 718         each: function( object, callback, args ) {
 719                 var name, i = 0, length = object.length;
 720
 721                 if ( args ) {
 722                         if ( length == undefined ) {
 723                                 for ( name in object )
 724                                         if ( callback.apply( object[ name ], args ) === false )
 725                                                 break;
 726                         } else
 727                                 for ( ; i < length; )
 728                                         if ( callback.apply( object[ i++ ], args ) === false )
 729                                                 break;
 730
 731                 // A special, fast, case for the most common use of each
 732                 } else {
 733                         if ( length == undefined ) {
 734                                 for ( name in object )
 735                                         if ( callback.call( object[ name ], name, object[ name ] ) === false )
 736                                                 break;
 737                         } else
 738                                 for ( var value = object[0];
 739                                         i < length && callback.call( value, i, value ) !== false; value = object[++i] ){}
 740                 }
 741
 742                 return object;
 743         },
 744
 745         prop: function( elem, value, type, i, name ) {
 746                         // Handle executable functions
 747                         if ( jQuery.isFunction( value ) )
 748                                 value = value.call( elem, i );
 749
 750                         // Handle passing in a number to a CSS property
 751                         return value && value.constructor == Number && type == "curCSS" && !exclude.test( name ) ?
 752                                 value + "px" :
 753                                 value;
 754         },
 755
 756         className: {
 757                 // internal only, use addClass("class")
 758                 add: function( elem, classNames ) {
 759                         jQuery.each((classNames || "").split(/\s+/), function(i, className){
 760                                 if ( elem.nodeType == 1 && !jQuery.className.has( elem.className, className ) )
 761                                         elem.className += (elem.className ? " " : "") + className;
 762                         });
 763                 },
 764
 765                 // internal only, use removeClass("class")
 766                 remove: function( elem, classNames ) {
 767                         if (elem.nodeType == 1)
 768                                 elem.className = classNames != undefined ?
 769                                         jQuery.grep(elem.className.split(/\s+/), function(className){
 770                                                 return !jQuery.className.has( classNames, className );
 771                                         }).join(" ") :
 772                                         "";
 773                 },
 774
 775                 // internal only, use is(".class")
 776                 has: function( elem, className ) {
 777                         return jQuery.inArray( className, (elem.className || elem).toString().split(/\s+/) ) > -1;
 778                 }
 779         },
 780
 781         // A method for quickly swapping in/out CSS properties to get correct calculations
 782         swap: function( elem, options, callback ) {
 783                 var old = {};
 784                 // Remember the old values, and insert the new ones
 785                 for ( var name in options ) {
 786                         old[ name ] = elem.style[ name ];
 787                         elem.style[ name ] = options[ name ];
 788                 }
 789
 790                 callback.call( elem );
 791
 792                 // Revert the old values
 793                 for ( var name in options )
 794                         elem.style[ name ] = old[ name ];
 795         },
 796
 797         css: function( elem, name, force ) {
 798                 if ( name == "width" || name == "height" ) {
 799                         var val, props = { position: "absolute", visibility: "hidden", display:"block" }, which = name == "width" ? [ "Left", "Right" ] : [ "Top", "Bottom" ];
 800
 801                         function getWH() {
 802                                 val = name == "width" ? elem.offsetWidth : elem.offsetHeight;
 803                                 var padding = 0, border = 0;
 804                                 jQuery.each( which, function() {
 805                                         padding += parseFloat(jQuery.curCSS( elem, "padding" + this, true)) || 0;
 806                                         border += parseFloat(jQuery.curCSS( elem, "border" + this + "Width", true)) || 0;
 807                                 });
 808                                 val -= Math.round(padding + border);
 809                         }
 810
 811                         if ( jQuery(elem).is(":visible") )
 812                                 getWH();
 813                         else
 814                                 jQuery.swap( elem, props, getWH );
 815
 816                         return Math.max(0, val);
 817                 }
 818
 819                 return jQuery.curCSS( elem, name, force );
 820         },
 821
 822         curCSS: function( elem, name, force ) {
 823                 var ret, style = elem.style;
 824
 825                 // A helper method for determining if an element's values are broken
 826                 function color( elem ) {
 827                         if ( !jQuery.browser.safari )
 828                                 return false;
 829
 830                         // getComputedStyle is cached
 831                         var ret = getComputedStyle( elem, null );
 832                         return !ret || ret.getPropertyValue("color") == "";
 833                 }
 834
 835                 // We need to handle opacity special in IE
 836                 if ( name == "opacity" && jQuery.browser.msie ) {
 837                         ret = jQuery.attr( style, "opacity" );
 838
 839                         return ret == "" ?
 840                                 "1" :
 841                                 ret;
 842                 }
 843                 // Opera sometimes will give the wrong display answer, this fixes it, see #2037
 844                 if ( jQuery.browser.opera && name == "display" ) {
 845                         var save = style.outline;
 846                         style.outline = "0 solid black";
 847                         style.outline = save;
 848                 }
 849
 850                 // Make sure we're using the right name for getting the float value
 851                 if ( name.match( /float/i ) )
 852                         name = styleFloat;
 853
 854                 if ( !force && style && style[ name ] )
 855                         ret = style[ name ];
 856
 857                 else if ( getComputedStyle ) {
 858
 859                         // Only "float" is needed here
 860                         if ( name.match( /float/i ) )
 861                                 name = "float";
 862
 863                         name = name.replace( /([A-Z])/g, "-$1" ).toLowerCase();
 864
 865                         var computedStyle = getComputedStyle( elem, null );
 866
 867                         if ( computedStyle && !color( elem ) )
 868                                 ret = computedStyle.getPropertyValue( name );
 869
 870                         // If the element isn't reporting its values properly in Safari
 871                         // then some display: none elements are involved
 872                         else {
 873                                 var swap = [], stack = [], a = elem, i = 0;
 874
 875                                 // Locate all of the parent display: none elements
 876                                 for ( ; a && color(a); a = a.parentNode )
 877                                         stack.unshift(a);
 878
 879                                 // Go through and make them visible, but in reverse
 880                                 // (It would be better if we knew the exact display type that they had)
 881                                 for ( ; i < stack.length; i++ )
 882                                         if ( color( stack[ i ] ) ) {
 883                                                 swap[ i ] = stack[ i ].style.display;
 884                                                 stack[ i ].style.display = "block";
 885                                         }
 886
 887                                 // Since we flip the display style, we have to handle that
 888                                 // one special, otherwise get the value
 889                                 ret = name == "display" && swap[ stack.length - 1 ] != null ?
 890                                         "none" :
 891                                         ( computedStyle && computedStyle.getPropertyValue( name ) ) || "";
 892
 893                                 // Finally, revert the display styles back
 894                                 for ( i = 0; i < swap.length; i++ )
 895                                         if ( swap[ i ] != null )
 896                                                 stack[ i ].style.display = swap[ i ];
 897                         }
 898
 899                         // We should always get a number back from opacity
 900                         if ( name == "opacity" && ret == "" )
 901                                 ret = "1";
 902
 903                 } else if ( elem.currentStyle ) {
 904                         var camelCase = name.replace(/\-(\w)/g, function(all, letter){
 905                                 return letter.toUpperCase();
 906                         });
 907
 908                         ret = elem.currentStyle[ name ] || elem.currentStyle[ camelCase ];
 909
 910                         // From the awesome hack by Dean Edwards
 911                         // http://erik.eae.net/archives/2007/07/27/18.54.15/#comment-102291
 912
 913                         // If we're not dealing with a regular pixel number
 914                         // but a number that has a weird ending, we need to convert it to pixels
 915                         if ( !/^\d+(px)?$/i.test( ret ) && /^\d/.test( ret ) ) {
 916                                 // Remember the original values
 917                                 var left = style.left, rsLeft = elem.runtimeStyle.left;
 918
 919                                 // Put in the new values to get a computed value out
 920                                 elem.runtimeStyle.left = elem.currentStyle.left;
 921                                 style.left = ret || 0;
 922                                 ret = style.pixelLeft + "px";
 923
 924                                 // Revert the changed values
 925                                 style.left = left;
 926                                 elem.runtimeStyle.left = rsLeft;
 927                         }
 928                 }
 929
 930                 return ret;
 931         },
 932
 933         clean: function( elems, context ) {
 934                 var ret = [];
 935                 context = context || document;
 936                 // !context.createElement fails in IE with an error but returns typeof 'object'
 937                 if (typeof context.createElement == 'undefined')
 938                         context = context.ownerDocument || context[0] && context[0].ownerDocument || document;
 939
 940                 jQuery.each(elems, function(i, elem){
 941                         if ( !elem )
 942                                 return;
 943
 944                         if ( elem.constructor == Number )
 945                                 elem += '';
 946
 947                         // Convert html string into DOM nodes
 948                         if ( typeof elem == "string" ) {
 949                                 // Fix "XHTML"-style tags in all browsers
 950                                 elem = elem.replace(/(<(\w+)[^>]*?)\/>/g, function(all, front, tag){
 951                                         return tag.match(/^(abbr|br|col|img|input|link|meta|param|hr|area|embed)$/i) ?
 952                                                 all :
 953                                                 front + "></" + tag + ">";
 954                                 });
 955
 956                                 // Trim whitespace, otherwise indexOf won't work as expected
 957                                 var tags = jQuery.trim( elem ).toLowerCase(), div = context.createElement("div");
 958
 959                                 var wrap =
 960                                         // option or optgroup
 961                                         !tags.indexOf("<opt") &&
 962                                         [ 1, "<select multiple='multiple'>", "</select>" ] ||
 963
 964                                         !tags.indexOf("<leg") &&
 965                                         [ 1, "<fieldset>", "</fieldset>" ] ||
 966
 967                                         tags.match(/^<(thead|tbody|tfoot|colg|cap)/) &&
 968                                         [ 1, "<table>", "</table>" ] ||
 969
 970                                         !tags.indexOf("<tr") &&
 971                                         [ 2, "<table><tbody>", "</tbody></table>" ] ||
 972
 973                                         // <thead> matched above
 974                                         (!tags.indexOf("<td") || !tags.indexOf("<th")) &&
 975                                         [ 3, "<table><tbody><tr>", "</tr></tbody></table>" ] ||
 976
 977                                         !tags.indexOf("<col") &&
 978                                         [ 2, "<table><tbody></tbody><colgroup>", "</colgroup></table>" ] ||
 979
 980                                         // IE can't serialize <link> and <script> tags normally
 981                                         jQuery.browser.msie &&
 982                                         [ 1, "div<div>", "</div>" ] ||
 983
 984                                         [ 0, "", "" ];
 985
 986                                 // Go to html and back, then peel off extra wrappers
 987                                 div.innerHTML = wrap[1] + elem + wrap[2];
 988
 989                                 // Move to the right depth
 990                                 while ( wrap[0]-- )
 991                                         div = div.lastChild;
 992
 993                                 // Remove IE's autoinserted <tbody> from table fragments
 994                                 if ( jQuery.browser.msie ) {
 995
 996                                         // String was a <table>, *may* have spurious <tbody>
 997                                         var tbody = !tags.indexOf("<table") && tags.indexOf("<tbody") < 0 ?
 998                                                 div.firstChild && div.firstChild.childNodes :
 999
1000                                                 // String was a bare <thead> or <tfoot>
1001                                                 wrap[1] == "<table>" && tags.indexOf("<tbody") < 0 ?
1002                                                         div.childNodes :
1003                                                         [];
1004
1005                                         for ( var j = tbody.length - 1; j >= 0 ; --j )
1006                                                 if ( jQuery.nodeName( tbody[ j ], "tbody" ) && !tbody[ j ].childNodes.length )
1007                                                         tbody[ j ].parentNode.removeChild( tbody[ j ] );
1008
1009                                         // IE completely kills leading whitespace when innerHTML is used
1010                                         if ( /^\s/.test( elem ) )
1011                                                 div.insertBefore( context.createTextNode( elem.match(/^\s*/)[0] ), div.firstChild );
1012
1013                                 }
1014
1015                                 elem = jQuery.makeArray( div.childNodes );
1016                         }
1017
1018                         if ( elem.length === 0 && (!jQuery.nodeName( elem, "form" ) && !jQuery.nodeName( elem, "select" )) )
1019                                 return;
1020
1021                         if ( elem[0] == undefined || jQuery.nodeName( elem, "form" ) || elem.options )
1022                                 ret.push( elem );
1023
1024                         else
1025                                 ret = jQuery.merge( ret, elem );
1026
1027                 });
1028
1029                 return ret;
1030         },
1031
1032         attr: function( elem, name, value ) {
1033                 // don't set attributes on text and comment nodes
1034                 if (!elem || elem.nodeType == 3 || elem.nodeType == 8)
1035                         return undefined;
1036
1037                 var fix = jQuery.isXMLDoc( elem ) ?
1038                         {} :
1039                         jQuery.props;
1040
1041                 // Safari mis-reports the default selected property of a hidden option
1042                 // Accessing the parent's selectedIndex property fixes it
1043                 if ( name == "selected" && jQuery.browser.safari )
1044                         elem.parentNode.selectedIndex;
1045
1046                 // Certain attributes only work when accessed via the old DOM 0 way
1047                 if ( fix[ name ] ) {
1048                         if ( value != undefined )
1049                                 elem[ fix[ name ] ] = value;
1050
1051                         return elem[ fix[ name ] ];
1052
1053                 } else if ( jQuery.browser.msie && name == "style" )
1054                         return jQuery.attr( elem.style, "cssText", value );
1055
1056                 else if ( value == undefined && jQuery.browser.msie && jQuery.nodeName( elem, "form" ) && (name == "action" || name == "method") )
1057                         return elem.getAttributeNode( name ).nodeValue;
1058
1059                 // IE elem.getAttribute passes even for style
1060                 else if ( elem.tagName ) {
1061
1062                         if ( value != undefined ) {
1063                                 // We can't allow the type property to be changed (since it causes problems in IE)
1064                                 if ( name == "type" && jQuery.nodeName( elem, "input" ) && elem.parentNode )
1065                                         throw "type property can't be changed";
1066
1067                                 // convert the value to a string (all browsers do this but IE) see #1070
1068                                 elem.setAttribute( name, "" + value );
1069                         }
1070
1071                         if ( jQuery.browser.msie && /href|src/.test( name ) && !jQuery.isXMLDoc( elem ) )
1072                                 return elem.getAttribute( name, 2 );
1073
1074                         return elem.getAttribute( name );
1075
1076                 // elem is actually elem.style ... set the style
1077                 } else {
1078                         // IE actually uses filters for opacity
1079                         if ( name == "opacity" && jQuery.browser.msie ) {
1080                                 if ( value != undefined ) {
1081                                         // IE has trouble with opacity if it does not have layout
1082                                         // Force it by setting the zoom level
1083                                         elem.zoom = 1;
1084
1085                                         // Set the alpha filter to set the opacity
1086                                         elem.filter = (elem.filter || "").replace( /alpha\([^)]*\)/, "" ) +
1087                                                 (parseFloat( value ).toString() == "NaN" ? "" : "alpha(opacity=" + value * 100 + ")");
1088                                 }
1089
1090                                 return elem.filter && elem.filter.indexOf("opacity=") >= 0 ?
1091                                         (parseFloat( elem.filter.match(/opacity=([^)]*)/)[1] ) / 100).toString() :
1092                                         "";
1093                         }
1094
1095                         name = name.replace(/-([a-z])/ig, function(all, letter){
1096                                 return letter.toUpperCase();
1097                         });
1098
1099                         if ( value != undefined )
1100                                 elem[ name ] = value;
1101
1102                         return elem[ name ];
1103                 }
1104         },
1105
1106         trim: function( text ) {
1107                 return (text || "").replace( /^\s+|\s+$/g, "" );
1108         },
1109
1110         makeArray: function( array ) {
1111                 var ret = [];
1112
1113                 if( array != null ){
1114                         var i = array.length;
1115                         //the window, strings and functions also have 'length'
1116                         if( i == null || array.split || array.setInterval || array.call )
1117                                 ret[0] = array;
1118                         else
1119                                 while( i )
1120                                         ret[--i] = array[i];
1121                 }
1122
1123                 return ret;
1124         },
1125
1126         inArray: function( elem, array ) {
1127                 for ( var i = 0, length = array.length; i < length; i++ )
1128                 // Use === because on IE, window == document
1129                         if ( array[ i ] === elem )
1130                                 return i;
1131
1132                 return -1;
1133         },
1134
1135         merge: function( first, second ) {
1136                 // We have to loop this way because IE & Opera overwrite the length
1137                 // expando of getElementsByTagName
1138                 var i = 0;
1139                 // Also, we need to make sure that the correct elements are being returned
1140                 // (IE returns comment nodes in a '*' query)
1141                 if ( jQuery.browser.msie ) {
1142                         for ( ; second[ i ]; i++ )
1143                                 if ( second[ i ].nodeType != 8 )
1144                                         first.push( second[ i ] );
1145
1146                 } else
1147                         for ( ; second[ i ]; i++ )
1148                                 first.push( second[ i ] );
1149
1150                 return first;
1151         },
1152
1153         unique: function( array ) {
1154                 var ret = [], done = {};
1155
1156                 try {
1157
1158                         for ( var i = 0, length = array.length; i < length; i++ ) {
1159                                 var id = jQuery.data( array[ i ] );
1160
1161                                 if ( !done[ id ] ) {
1162                                         done[ id ] = true;
1163                                         ret.push( array[ i ] );
1164                                 }
1165                         }
1166
1167                 } catch( e ) {
1168                         ret = array;
1169                 }
1170
1171                 return ret;
1172         },
1173
1174         grep: function( elems, callback, inv ) {
1175                 var ret = [];
1176
1177                 // Go through the array, only saving the items
1178                 // that pass the validator function
1179                 for ( var i = 0, length = elems.length; i < length; i++ )
1180                         if ( !inv != !callback( elems[ i ], i ) )
1181                                 ret.push( elems[ i ] );
1182
1183                 return ret;
1184         },
1185
1186         map: function( elems, callback ) {
1187                 var ret = [];
1188
1189                 // Go through the array, translating each of the items to their
1190                 // new value (or values).
1191                 for ( var i = 0, length = elems.length; i < length; i++ ) {
1192                         var value = callback( elems[ i ], i );
1193
1194                         if ( value != null )
1195                                 ret[ ret.length ] = value;
1196                 }
1197
1198                 return ret.concat.apply( [], ret );
1199         }
1200 });
1201
1202 var userAgent = navigator.userAgent.toLowerCase();
1203
1204 // Figure out what browser is being used
1205 jQuery.browser = {
1206         version: (userAgent.match( /.+(?:rv|it|ra|ie)[\/: ]([\d.]+)/ ) || [])[1],
1207         safari: /webkit/.test( userAgent ),
1208         opera: /opera/.test( userAgent ),
1209         msie: /msie/.test( userAgent ) && !/opera/.test( userAgent ),
1210         mozilla: /mozilla/.test( userAgent ) && !/(compatible|webkit)/.test( userAgent )
1211 };
1212
1213 var styleFloat = jQuery.browser.msie ?
1214         "styleFloat" :
1215         "cssFloat";
1216
1217 jQuery.extend({
1218         // Check to see if the W3C box model is being used
1219         boxModel: !jQuery.browser.msie || document.compatMode == "CSS1Compat",
1220
1221         props: {
1222                 "for": "htmlFor",
1223                 "class": "className",
1224                 "float": styleFloat,
1225                 cssFloat: styleFloat,
1226                 styleFloat: styleFloat,
1227                 innerHTML: "innerHTML",
1228                 className: "className",
1229                 value: "value",
1230                 disabled: "disabled",
1231                 checked: "checked",
1232                 readonly: "readOnly",
1233                 selected: "selected",
1234                 maxlength: "maxLength",
1235                 selectedIndex: "selectedIndex",
1236                 defaultValue: "defaultValue",
1237                 tagName: "tagName",
1238                 nodeName: "nodeName"
1239         }
1240 });
1241
1242 jQuery.each({
1243         parent: function(elem){return elem.parentNode;},
1244         parents: function(elem){return jQuery.dir(elem,"parentNode");},
1245         next: function(elem){return jQuery.nth(elem,2,"nextSibling");},
1246         prev: function(elem){return jQuery.nth(elem,2,"previousSibling");},
1247         nextAll: function(elem){return jQuery.dir(elem,"nextSibling");},
1248         prevAll: function(elem){return jQuery.dir(elem,"previousSibling");},
1249         siblings: function(elem){return jQuery.sibling(elem.parentNode.firstChild,elem);},
1250         children: function(elem){return jQuery.sibling(elem.firstChild);},
1251         contents: function(elem){return jQuery.nodeName(elem,"iframe")?elem.contentDocument||elem.contentWindow.document:jQuery.makeArray(elem.childNodes);}
1252 }, function(name, fn){
1253         jQuery.fn[ name ] = function( selector ) {
1254                 var ret = jQuery.map( this, fn );
1255
1256                 if ( selector && typeof selector == "string" )
1257                         ret = jQuery.multiFilter( selector, ret );
1258
1259                 return this.pushStack( jQuery.unique( ret ) );
1260         };
1261 });
1262
1263 jQuery.each({
1264         appendTo: "append",
1265         prependTo: "prepend",
1266         insertBefore: "before",
1267         insertAfter: "after",
1268         replaceAll: "replaceWith"
1269 }, function(name, original){
1270         jQuery.fn[ name ] = function() {
1271                 var args = arguments;
1272
1273                 return this.each(function(){
1274                         for ( var i = 0, length = args.length; i < length; i++ )
1275                                 jQuery( args[ i ] )[ original ]( this );
1276                 });
1277         };
1278 });
1279
1280 jQuery.each({
1281         removeAttr: function( name ) {
1282                 jQuery.attr( this, name, "" );
1283                 if (this.nodeType == 1)
1284                         this.removeAttribute( name );
1285         },
1286
1287         addClass: function( classNames ) {
1288                 jQuery.className.add( this, classNames );
1289         },
1290
1291         removeClass: function( classNames ) {
1292                 jQuery.className.remove( this, classNames );
1293         },
1294
1295         toggleClass: function( classNames ) {
1296                 jQuery.className[ jQuery.className.has( this, classNames ) ? "remove" : "add" ]( this, classNames );
1297         },
1298
1299         remove: function( selector ) {
1300                 if ( !selector || jQuery.filter( selector, [ this ] ).r.length ) {
1301                         // Prevent memory leaks
1302                         jQuery( "*", this ).add(this).each(function(){
1303                                 jQuery.event.remove(this);
1304                                 jQuery.removeData(this);
1305                         });
1306                         if (this.parentNode)
1307                                 this.parentNode.removeChild( this );
1308                 }
1309         },
1310
1311         empty: function() {
1312                 // Remove element nodes and prevent memory leaks
1313                 jQuery( ">*", this ).remove();
1314
1315                 // Remove any remaining nodes
1316                 while ( this.firstChild )
1317                         this.removeChild( this.firstChild );
1318         }
1319 }, function(name, fn){
1320         jQuery.fn[ name ] = function(){
1321                 return this.each( fn, arguments );
1322         };
1323 });
1324
1325 jQuery.each([ "Height", "Width" ], function(i, name){
1326         var type = name.toLowerCase();
1327
1328         jQuery.fn[ type ] = function( size ) {
1329                 // Get window width or height
1330                 return this[0] == window ?
1331                         // Opera reports document.body.client[Width/Height] properly in both quirks and standards
1332                         jQuery.browser.opera && document.body[ "client" + name ] ||
1333
1334                         // Safari reports inner[Width/Height] just fine (Mozilla and Opera include scroll bar widths)
1335                         jQuery.browser.safari && window[ "inner" + name ] ||
1336
1337                         // Everyone else use document.documentElement or document.body depending on Quirks vs Standards mode
1338                         document.compatMode == "CSS1Compat" && document.documentElement[ "client" + name ] || document.body[ "client" + name ] :
1339
1340                         // Get document width or height
1341                         this[0] == document ?
1342                                 // Either scroll[Width/Height] or offset[Width/Height], whichever is greater
1343                                 Math.max(
1344                                         Math.max(document.body["scroll" + name], document.documentElement["scroll" + name]),
1345                                         Math.max(document.body["offset" + name], document.documentElement["offset" + name])
1346                                 ) :
1347
1348                                 // Get or set width or height on the element
1349                                 size == undefined ?
1350                                         // Get width or height on the element
1351                                         (this.length ? jQuery.css( this[0], type ) : null) :
1352
1353                                         // Set the width or height on the element (default to pixels if value is unitless)
1354                                         this.css( type, size.constructor == String ? size : size + "px" );
1355         };
1356 });