src/core.js

   1 var
   2         // Will speed up references to window, and allows munging its name.
   3         window = this,
   4         // Will speed up references to undefined, and allows munging its name.
   5         undefined,
   6         // Map over jQuery in case of overwrite
   7         _jQuery = window.jQuery,
   8         // Map over the $ in case of overwrite
   9         _$ = window.$,
  10
  11         jQuery = window.jQuery = window.$ = function( selector, context ) {
  12                 // The jQuery object is actually just the init constructor 'enhanced'
  13                 return selector === undefined ?
  14                         rootjQuery :
  15                         new jQuery.fn.init( selector, context );
  16         },
  17
  18         // A simple way to check for HTML strings or ID strings
  19         // (both of which we optimize for)
  20         quickExpr = /^[^<]*(<(.|\s)+>)[^>]*$|^#([\w-]+)$/,
  21         // Is it a simple selector
  22         isSimple = /^.[^:#\[\.,]*$/;
  23
  24 jQuery.fn = jQuery.prototype = {
  25         init: function( selector, context ) {
  26                 // Handle $("") or $(null)
  27                 if ( !selector ) {
  28                         this.length = 0;
  29                         return this;
  30                 }
  31
  32                 // Handle $(DOMElement)
  33                 if ( selector.nodeType ) {
  34                         this[0] = selector;
  35                         this.length = 1;
  36                         this.context = selector;
  37                         return this;
  38                 }
  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                                         // Handle the case where IE and Opera return items
  57                                         // by name instead of ID
  58                                         if ( elem && elem.id != match[3] ) {
  59                                                 return rootjQuery.find( selector );
  60                                         }
  61
  62                                         // Otherwise, we inject the element directly into the jQuery object
  63                                         var ret = jQuery( elem || null );
  64                                         ret.context = document;
  65                                         ret.selector = selector;
  66                                         return ret;
  67                                 }
  68
  69                         // HANDLE: $(expr, $(...))
  70                         } else if ( !context || context.jquery ) {
  71                                 return (context || rootjQuery).find( selector );
  72
  73                         // HANDLE: $(expr, context)
  74                         // (which is just equivalent to: $(context).find(expr)
  75                         } else {
  76                                 return jQuery( context ).find( selector );
  77                         }
  78
  79                 // HANDLE: $(function)
  80                 // Shortcut for document ready
  81                 } else if ( jQuery.isFunction( selector ) ) {
  82                         return rootjQuery.ready( selector );
  83                 }
  84
  85                 // Make sure that old selector state is passed along
  86                 if ( selector.selector && selector.context ) {
  87                         this.selector = selector.selector;
  88                         this.context = selector.context;
  89                 }
  90
  91                 return this.setArray(jQuery.isArray( selector ) ?
  92                         selector :
  93                         jQuery.makeArray(selector));
  94         },
  95
  96         // Start with an empty selector
  97         selector: "",
  98
  99         // The current version of jQuery being used
 100         jquery: "@VERSION",
 101
 102         // The number of elements contained in the matched element set
 103         size: function() {
 104                 return this.length;
 105         },
 106
 107         // Get the Nth element in the matched element set OR
 108         // Get the whole matched element set as a clean array
 109         get: function( num ) {
 110                 return num === undefined ?
 111
 112                         // Return a 'clean' array
 113                         Array.prototype.slice.call( this ) :
 114
 115                         // Return just the object
 116                         this[ num ];
 117         },
 118
 119         // Take an array of elements and push it onto the stack
 120         // (returning the new matched element set)
 121         pushStack: function( elems, name, selector ) {
 122                 // Build a new jQuery matched element set
 123                 var ret = jQuery( elems || null );
 124
 125                 // Add the old object onto the stack (as a reference)
 126                 ret.prevObject = this;
 127
 128                 ret.context = this.context;
 129
 130                 if ( name === "find" )
 131                         ret.selector = this.selector + (this.selector ? " " : "") + selector;
 132                 else if ( name )
 133                         ret.selector = this.selector + "." + name + "(" + selector + ")";
 134
 135                 // Return the newly-formed element set
 136                 return ret;
 137         },
 138
 139         // Force the current matched set of elements to become
 140         // the specified array of elements (destroying the stack in the process)
 141         // You should use pushStack() in order to do this, but maintain the stack
 142         setArray: function( elems ) {
 143                 // Resetting the length to 0, then using the native Array push
 144                 // is a super-fast way to populate an object with array-like properties
 145                 this.length = 0;
 146                 Array.prototype.push.apply( this, elems );
 147
 148                 return this;
 149         },
 150
 151         // Execute a callback for every element in the matched set.
 152         // (You can seed the arguments with an array of args, but this is
 153         // only used internally.)
 154         each: function( callback, args ) {
 155                 return jQuery.each( this, callback, args );
 156         },
 157
 158         // Determine the position of an element within
 159         // the matched set of elements
 160         index: function( elem ) {
 161                 // Locate the position of the desired element
 162                 return jQuery.inArray(
 163                         // If it receives a jQuery object, the first element is used
 164                         elem && elem.jquery ? elem[0] : elem
 165                 , this );
 166         },
 167
 168         attr: function( name, value, type ) {
 169                 var options = name, isFunction = jQuery.isFunction( value );
 170
 171                 // Look for the case where we're accessing a style value
 172                 if ( typeof name === "string" ) {
 173                         if ( value === undefined ) {
 174                                 return this.length ?
 175                                         jQuery[ type || "attr" ]( this[0], name ) :
 176                                         null;
 177
 178                         } else {
 179                                 options = {};
 180                                 options[ name ] = value;
 181                         }
 182                 }
 183
 184                 // Check to see if we're setting style values
 185                 for ( var i = 0, l = this.length; i < l; i++ ) {
 186                         var elem = this[i];
 187
 188                         // Set all the styles
 189                         for ( var prop in options ) {
 190                                 value = options[prop];
 191
 192                                 if ( isFunction ) {
 193                                         value = value.call( elem, i );
 194                                 }
 195
 196                                 if ( typeof value === "number" && type === "curCSS" && !exclude.test(prop) ) {
 197                                         value = value + "px";
 198                                 }
 199
 200                                 jQuery.attr( type ? elem.style : elem, prop, value );
 201                         }
 202                 }
 203
 204                 return this;
 205         },
 206
 207         css: function( key, value ) {
 208                 // ignore negative width and height values
 209                 if ( (key == 'width' || key == 'height') && parseFloat(value) < 0 )
 210                         value = undefined;
 211                 return this.attr( key, value, "curCSS" );
 212         },
 213
 214         text: function( text ) {
 215                 if ( typeof text !== "object" && text != null )
 216                         return this.empty().append( (this[0] && this[0].ownerDocument || document).createTextNode( text ) );
 217
 218                 var ret = "";
 219
 220                 jQuery.each( text || this, function(){
 221                         jQuery.each( this.childNodes, function(){
 222                                 if ( this.nodeType != 8 )
 223                                         ret += this.nodeType != 1 ?
 224                                                 this.nodeValue :
 225                                                 jQuery.fn.text( [ this ] );
 226                         });
 227                 });
 228
 229                 return ret;
 230         },
 231
 232         wrapAll: function( html ) {
 233                 if ( this[0] ) {
 234                         // The elements to wrap the target around
 235                         var wrap = jQuery( html, this[0].ownerDocument ).clone();
 236
 237                         if ( this[0].parentNode )
 238                                 wrap.insertBefore( this[0] );
 239
 240                         wrap.map(function(){
 241                                 var elem = this;
 242
 243                                 while ( elem.firstChild )
 244                                         elem = elem.firstChild;
 245
 246                                 return elem;
 247                         }).append(this);
 248                 }
 249
 250                 return this;
 251         },
 252
 253         wrapInner: function( html ) {
 254                 return this.each(function(){
 255                         jQuery( this ).contents().wrapAll( html );
 256                 });
 257         },
 258
 259         wrap: function( html ) {
 260                 return this.each(function(){
 261                         jQuery( this ).wrapAll( html );
 262                 });
 263         },
 264
 265         append: function() {
 266                 return this.domManip(arguments, true, function(elem){
 267                         if (this.nodeType == 1)
 268                                 this.appendChild( elem );
 269                 });
 270         },
 271
 272         prepend: function() {
 273                 return this.domManip(arguments, true, function(elem){
 274                         if (this.nodeType == 1)
 275                                 this.insertBefore( elem, this.firstChild );
 276                 });
 277         },
 278
 279         before: function() {
 280                 return this.domManip(arguments, false, function(elem){
 281                         this.parentNode.insertBefore( elem, this );
 282                 });
 283         },
 284
 285         after: function() {
 286                 return this.domManip(arguments, false, function(elem){
 287                         this.parentNode.insertBefore( elem, this.nextSibling );
 288                 });
 289         },
 290
 291         end: function() {
 292                 return this.prevObject || jQuery(null);
 293         },
 294
 295         // For internal use only.
 296         // Behaves like an Array's method, not like a jQuery method.
 297         push: [].push,
 298         sort: [].sort,
 299         splice: [].splice,
 300
 301         find: function( selector ) {
 302                 var ret = this.pushStack( "", "find", selector ), length = 0;
 303
 304                 for ( var i = 0, l = this.length; i < l; i++ ) {
 305                         length = ret.length;
 306                         jQuery.find( selector, this[i], ret );
 307
 308                         if ( i > 0 ) {
 309                                 // Make sure that the results are unique
 310                                 for ( var n = length; n < ret.length; n++ ) {
 311                                         for ( var r = 0; r < length; r++ ) {
 312                                                 if ( ret[r] === ret[n] ) {
 313                                                         ret.splice(n--, 1);
 314                                                         break;
 315                                                 }
 316                                         }
 317                                 }
 318                         }
 319                 }
 320
 321                 return ret;
 322         },
 323
 324         clone: function( events ) {
 325                 // Do the clone
 326                 var ret = this.map(function(){
 327                         if ( !jQuery.support.noCloneEvent && !jQuery.isXMLDoc(this) ) {
 328                                 // IE copies events bound via attachEvent when
 329                                 // using cloneNode. Calling detachEvent on the
 330                                 // clone will also remove the events from the orignal
 331                                 // In order to get around this, we use innerHTML.
 332                                 // Unfortunately, this means some modifications to
 333                                 // attributes in IE that are actually only stored
 334                                 // as properties will not be copied (such as the
 335                                 // the name attribute on an input).
 336                                 var html = this.outerHTML;
 337                                 if ( !html ) {
 338                                         var div = this.ownerDocument.createElement("div");
 339                                         div.appendChild( this.cloneNode(true) );
 340                                         html = div.innerHTML;
 341                                 }
 342
 343                                 return jQuery.clean([html.replace(/ jQuery\d+="(?:\d+|null)"/g, "").replace(/^\s*/, "")])[0];
 344                         } else
 345                                 return this.cloneNode(true);
 346                 });
 347
 348                 // Copy the events from the original to the clone
 349                 if ( events === true ) {
 350                         var orig = this.find("*").andSelf(), i = 0;
 351
 352                         ret.find("*").andSelf().each(function(){
 353                                 if ( this.nodeName !== orig[i].nodeName )
 354                                         return;
 355
 356                                 var events = jQuery.data( orig[i], "events" );
 357
 358                                 for ( var type in events ) {
 359                                         for ( var handler in events[ type ] ) {
 360                                                 jQuery.event.add( this, type, events[ type ][ handler ], events[ type ][ handler ].data );
 361                                         }
 362                                 }
 363
 364                                 i++;
 365                         });
 366                 }
 367
 368                 // Return the cloned set
 369                 return ret;
 370         },
 371
 372         filter: function( selector ) {
 373                 return this.pushStack(
 374                         jQuery.isFunction( selector ) &&
 375                         jQuery.grep(this, function(elem, i){
 376                                 return selector.call( elem, i );
 377                         }) ||
 378
 379                         jQuery.multiFilter( selector, jQuery.grep(this, function(elem){
 380                                 return elem.nodeType === 1;
 381                         }) ), "filter", selector );
 382         },
 383
 384         closest: function( selector ) {
 385                 var pos = jQuery.expr.match.POS.test( selector ) ? jQuery(selector) : null,
 386                         closer = 0;
 387
 388                 return this.map(function(){
 389                         var cur = this;
 390                         while ( cur && cur.ownerDocument ) {
 391                                 if ( pos ? pos.index(cur) > -1 : jQuery(cur).is(selector) ) {
 392                                         jQuery.data(cur, "closest", closer);
 393                                         return cur;
 394                                 }
 395                                 cur = cur.parentNode;
 396                                 closer++;
 397                         }
 398                 });
 399         },
 400
 401         not: function( selector ) {
 402                 if ( typeof selector === "string" )
 403                         // test special case where just one selector is passed in
 404                         if ( isSimple.test( selector ) )
 405                                 return this.pushStack( jQuery.multiFilter( selector, this, true ), "not", selector );
 406                         else
 407                                 selector = jQuery.multiFilter( selector, this );
 408
 409                 var isArrayLike = selector.length && selector[selector.length - 1] !== undefined && !selector.nodeType;
 410                 return this.filter(function() {
 411                         return isArrayLike ? jQuery.inArray( this, selector ) < 0 : this != selector;
 412                 });
 413         },
 414
 415         add: function( selector ) {
 416                 return this.pushStack( jQuery.unique( jQuery.merge(
 417                         this.get(),
 418                         typeof selector === "string" ?
 419                                 jQuery( selector ) :
 420                                 jQuery.makeArray( selector )
 421                 )));
 422         },
 423
 424         is: function( selector ) {
 425                 return !!selector && jQuery.multiFilter( selector, this ).length > 0;
 426         },
 427
 428         hasClass: function( selector ) {
 429                 return !!selector && this.is( "." + selector );
 430         },
 431
 432         val: function( value ) {
 433                 if ( value === undefined ) {
 434                         var elem = this[0];
 435
 436                         if ( elem ) {
 437                                 if( jQuery.nodeName( elem, 'option' ) )
 438                                         return (elem.attributes.value || {}).specified ? elem.value : elem.text;
 439
 440                                 // We need to handle select boxes special
 441                                 if ( jQuery.nodeName( elem, "select" ) ) {
 442                                         var index = elem.selectedIndex,
 443                                                 values = [],
 444                                                 options = elem.options,
 445                                                 one = elem.type == "select-one";
 446
 447                                         // Nothing was selected
 448                                         if ( index < 0 )
 449                                                 return null;
 450
 451                                         // Loop through all the selected options
 452                                         for ( var i = one ? index : 0, max = one ? index + 1 : options.length; i < max; i++ ) {
 453                                                 var option = options[ i ];
 454
 455                                                 if ( option.selected ) {
 456                                                         // Get the specifc value for the option
 457                                                         value = jQuery(option).val();
 458
 459                                                         // We don't need an array for one selects
 460                                                         if ( one )
 461                                                                 return value;
 462
 463                                                         // Multi-Selects return an array
 464                                                         values.push( value );
 465                                                 }
 466                                         }
 467
 468                                         return values;
 469                                 }
 470
 471                                 // Everything else, we just grab the value
 472                                 return (elem.value || "").replace(/\r/g, "");
 473
 474                         }
 475
 476                         return undefined;
 477                 }
 478
 479                 if ( typeof value === "number" )
 480                         value += '';
 481
 482                 return this.each(function(){
 483                         if ( this.nodeType != 1 )
 484                                 return;
 485
 486                         if ( jQuery.isArray(value) && /radio|checkbox/.test( this.type ) )
 487                                 this.checked = (jQuery.inArray(this.value, value) >= 0 ||
 488                                         jQuery.inArray(this.name, value) >= 0);
 489
 490                         else if ( jQuery.nodeName( this, "select" ) ) {
 491                                 var values = jQuery.makeArray(value);
 492
 493                                 jQuery( "option", this ).each(function(){
 494                                         this.selected = (jQuery.inArray( this.value, values ) >= 0 ||
 495                                                 jQuery.inArray( this.text, values ) >= 0);
 496                                 });
 497
 498                                 if ( !values.length )
 499                                         this.selectedIndex = -1;
 500
 501                         } else
 502                                 this.value = value;
 503                 });
 504         },
 505
 506         html: function( value ) {
 507                 return value === undefined ?
 508                         (this[0] ?
 509                                 this[0].innerHTML.replace(/ jQuery\d+="(?:\d+|null)"/g, "") :
 510                                 null) :
 511                         this.empty().append( value );
 512         },
 513
 514         replaceWith: function( value ) {
 515                 return this.after( value ).remove();
 516         },
 517
 518         eq: function( i ) {
 519                 return this.slice( i, +i + 1 );
 520         },
 521
 522         slice: function() {
 523                 return this.pushStack( Array.prototype.slice.apply( this, arguments ),
 524                         "slice", Array.prototype.slice.call(arguments).join(",") );
 525         },
 526
 527         map: function( callback ) {
 528                 return this.pushStack( jQuery.map(this, function(elem, i){
 529                         return callback.call( elem, i, elem );
 530                 }));
 531         },
 532
 533         andSelf: function() {
 534                 return this.add( this.prevObject );
 535         },
 536
 537         domManip: function( args, table, callback ) {
 538                 if ( this[0] ) {
 539                         var fragment = (this[0].ownerDocument || this[0]).createDocumentFragment(),
 540                                 scripts = jQuery.clean( args, (this[0].ownerDocument || this[0]), fragment ),
 541                                 first = fragment.firstChild;
 542
 543                         if ( first )
 544                                 for ( var i = 0, l = this.length; i < l; i++ )
 545                                         callback.call( root(this[i], first), this.length > 1 || i > 0 ?
 546                                                         fragment.cloneNode(true) : fragment );
 547
 548                         if ( scripts )
 549                                 jQuery.each( scripts, evalScript );
 550                 }
 551
 552                 return this;
 553
 554                 function root( elem, cur ) {
 555                         return table && jQuery.nodeName(elem, "table") && jQuery.nodeName(cur, "tr") ?
 556                                 (elem.getElementsByTagName("tbody")[0] ||
 557                                 elem.appendChild(elem.ownerDocument.createElement("tbody"))) :
 558                                 elem;
 559                 }
 560         }
 561 };
 562
 563 // Give the init function the jQuery prototype for later instantiation
 564 jQuery.fn.init.prototype = jQuery.fn;
 565
 566 function evalScript( i, elem ) {
 567         if ( elem.src )
 568                 jQuery.ajax({
 569                         url: elem.src,
 570                         async: false,
 571                         dataType: "script"
 572                 });
 573
 574         else
 575                 jQuery.globalEval( elem.text || elem.textContent || elem.innerHTML || "" );
 576
 577         if ( elem.parentNode )
 578                 elem.parentNode.removeChild( elem );
 579 }
 580
 581 function now(){
 582         return +new Date;
 583 }
 584
 585 jQuery.extend = jQuery.fn.extend = function() {
 586         // copy reference to target object
 587         var target = arguments[0] || {}, i = 1, length = arguments.length, deep = false, options;
 588
 589         // Handle a deep copy situation
 590         if ( typeof target === "boolean" ) {
 591                 deep = target;
 592                 target = arguments[1] || {};
 593                 // skip the boolean and the target
 594                 i = 2;
 595         }
 596
 597         // Handle case when target is a string or something (possible in deep copy)
 598         if ( typeof target !== "object" && !jQuery.isFunction(target) )
 599                 target = {};
 600
 601         // extend jQuery itself if only one argument is passed
 602         if ( length == i ) {
 603                 target = this;
 604                 --i;
 605         }
 606
 607         for ( ; i < length; i++ )
 608                 // Only deal with non-null/undefined values
 609                 if ( (options = arguments[ i ]) != null )
 610                         // Extend the base object
 611                         for ( var name in options ) {
 612                                 var src = target[ name ], copy = options[ name ];
 613
 614                                 // Prevent never-ending loop
 615                                 if ( target === copy )
 616                                         continue;
 617
 618                                 // Recurse if we're merging object values
 619                                 if ( deep && copy && typeof copy === "object" && !copy.nodeType )
 620                                         target[ name ] = jQuery.extend( deep,
 621                                                 // Never move original objects, clone them
 622                                                 src || ( copy.length != null ? [ ] : { } )
 623                                         , copy );
 624
 625                                 // Don't bring in undefined values
 626                                 else if ( copy !== undefined )
 627                                         target[ name ] = copy;
 628
 629                         }
 630
 631         // Return the modified object
 632         return target;
 633 };
 634
 635 // exclude the following css properties to add px
 636 var     exclude = /z-?index|font-?weight|opacity|zoom|line-?height/i,
 637         // cache defaultView
 638         defaultView = document.defaultView || {},
 639         toString = Object.prototype.toString;
 640
 641 jQuery.extend({
 642         noConflict: function( deep ) {
 643                 window.$ = _$;
 644
 645                 if ( deep )
 646                         window.jQuery = _jQuery;
 647
 648                 return jQuery;
 649         },
 650
 651         // See test/unit/core.js for details concerning isFunction.
 652         // Since version 1.3, DOM methods and functions like alert
 653         // aren't supported. They return false on IE (#2968).
 654         isFunction: function( obj ) {
 655                 return toString.call(obj) === "[object Function]";
 656         },
 657
 658         isArray: function( obj ) {
 659                 return toString.call(obj) === "[object Array]";
 660         },
 661
 662         // check if an element is in a (or is an) XML document
 663         isXMLDoc: function( elem ) {
 664                 return elem.nodeType === 9 && elem.documentElement.nodeName !== "HTML" ||
 665                         !!elem.ownerDocument && elem.ownerDocument.documentElement.nodeName !== "HTML";
 666         },
 667
 668         // Evalulates a script in a global context
 669         globalEval: function( data ) {
 670                 if ( data && /\S/.test(data) ) {
 671                         // Inspired by code by Andrea Giammarchi
 672                         // http://webreflection.blogspot.com/2007/08/global-scope-evaluation-and-dom.html
 673                         var head = document.getElementsByTagName("head")[0] || document.documentElement,
 674                                 script = document.createElement("script");
 675
 676                         script.type = "text/javascript";
 677                         if ( jQuery.support.scriptEval )
 678                                 script.appendChild( document.createTextNode( data ) );
 679                         else
 680                                 script.text = data;
 681
 682                         // Use insertBefore instead of appendChild  to circumvent an IE6 bug.
 683                         // This arises when a base node is used (#2709).
 684                         head.insertBefore( script, head.firstChild );
 685                         head.removeChild( script );
 686                 }
 687         },
 688
 689         nodeName: function( elem, name ) {
 690                 return elem.nodeName && elem.nodeName.toUpperCase() == name.toUpperCase();
 691         },
 692
 693         // args is for internal usage only
 694         each: function( object, callback, args ) {
 695                 var name, i = 0, length = object.length;
 696
 697                 if ( args ) {
 698                         if ( length === undefined ) {
 699                                 for ( name in object )
 700                                         if ( callback.apply( object[ name ], args ) === false )
 701                                                 break;
 702                         } else
 703                                 for ( ; i < length; )
 704                                         if ( callback.apply( object[ i++ ], args ) === false )
 705                                                 break;
 706
 707                 // A special, fast, case for the most common use of each
 708                 } else {
 709                         if ( length === undefined ) {
 710                                 for ( name in object )
 711                                         if ( callback.call( object[ name ], name, object[ name ] ) === false )
 712                                                 break;
 713                         } else
 714                                 for ( var value = object[0];
 715                                         i < length && callback.call( value, i, value ) !== false; value = object[++i] ){}
 716                 }
 717
 718                 return object;
 719         },
 720
 721         className: {
 722                 // internal only, use addClass("class")
 723                 add: function( elem, classNames ) {
 724                         jQuery.each((classNames || "").split(/\s+/), function(i, className){
 725                                 if ( elem.nodeType == 1 && !jQuery.className.has( elem.className, className ) )
 726                                         elem.className += (elem.className ? " " : "") + className;
 727                         });
 728                 },
 729
 730                 // internal only, use removeClass("class")
 731                 remove: function( elem, classNames ) {
 732                         if (elem.nodeType == 1)
 733                                 elem.className = classNames !== undefined ?
 734                                         jQuery.grep(elem.className.split(/\s+/), function(className){
 735                                                 return !jQuery.className.has( classNames, className );
 736                                         }).join(" ") :
 737                                         "";
 738                 },
 739
 740                 // internal only, use hasClass("class")
 741                 has: function( elem, className ) {
 742                         return elem && jQuery.inArray( className, (elem.className || elem).toString().split(/\s+/) ) > -1;
 743                 }
 744         },
 745
 746         // A method for quickly swapping in/out CSS properties to get correct calculations
 747         swap: function( elem, options, callback ) {
 748                 var old = {};
 749                 // Remember the old values, and insert the new ones
 750                 for ( var name in options ) {
 751                         old[ name ] = elem.style[ name ];
 752                         elem.style[ name ] = options[ name ];
 753                 }
 754
 755                 callback.call( elem );
 756
 757                 // Revert the old values
 758                 for ( var name in options )
 759                         elem.style[ name ] = old[ name ];
 760         },
 761
 762         css: function( elem, name, force, extra ) {
 763                 if ( name == "width" || name == "height" ) {
 764                         var val, props = { position: "absolute", visibility: "hidden", display:"block" }, which = name == "width" ? [ "Left", "Right" ] : [ "Top", "Bottom" ];
 765
 766                         function getWH() {
 767                                 val = name == "width" ? elem.offsetWidth : elem.offsetHeight;
 768
 769                                 if ( extra === "border" )
 770                                         return;
 771
 772                                 jQuery.each( which, function() {
 773                                         if ( !extra )
 774                                                 val -= parseFloat(jQuery.curCSS( elem, "padding" + this, true)) || 0;
 775                                         if ( extra === "margin" )
 776                                                 val += parseFloat(jQuery.curCSS( elem, "margin" + this, true)) || 0;
 777                                         else
 778                                                 val -= parseFloat(jQuery.curCSS( elem, "border" + this + "Width", true)) || 0;
 779                                 });
 780                         }
 781
 782                         if ( elem.offsetWidth !== 0 )
 783                                 getWH();
 784                         else
 785                                 jQuery.swap( elem, props, getWH );
 786
 787                         return Math.max(0, Math.round(val));
 788                 }
 789
 790                 return jQuery.curCSS( elem, name, force );
 791         },
 792
 793         curCSS: function( elem, name, force ) {
 794                 var ret, style = elem.style;
 795
 796                 // We need to handle opacity special in IE
 797                 if ( name == "opacity" && !jQuery.support.opacity ) {
 798                         ret = jQuery.attr( style, "opacity" );
 799
 800                         return ret == "" ?
 801                                 "1" :
 802                                 ret;
 803                 }
 804
 805                 // Make sure we're using the right name for getting the float value
 806                 if ( name.match( /float/i ) )
 807                         name = styleFloat;
 808
 809                 if ( !force && style && style[ name ] )
 810                         ret = style[ name ];
 811
 812                 else if ( defaultView.getComputedStyle ) {
 813
 814                         // Only "float" is needed here
 815                         if ( name.match( /float/i ) )
 816                                 name = "float";
 817
 818                         name = name.replace( /([A-Z])/g, "-$1" ).toLowerCase();
 819
 820                         var computedStyle = defaultView.getComputedStyle( elem, null );
 821
 822                         if ( computedStyle )
 823                                 ret = computedStyle.getPropertyValue( name );
 824
 825                         // We should always get a number back from opacity
 826                         if ( name == "opacity" && ret == "" )
 827                                 ret = "1";
 828
 829                 } else if ( elem.currentStyle ) {
 830                         var camelCase = name.replace(/\-(\w)/g, function(all, letter){
 831                                 return letter.toUpperCase();
 832                         });
 833
 834                         ret = elem.currentStyle[ name ] || elem.currentStyle[ camelCase ];
 835
 836                         // From the awesome hack by Dean Edwards
 837                         // http://erik.eae.net/archives/2007/07/27/18.54.15/#comment-102291
 838
 839                         // If we're not dealing with a regular pixel number
 840                         // but a number that has a weird ending, we need to convert it to pixels
 841                         if ( !/^\d+(px)?$/i.test( ret ) && /^\d/.test( ret ) ) {
 842                                 // Remember the original values
 843                                 var left = style.left, rsLeft = elem.runtimeStyle.left;
 844
 845                                 // Put in the new values to get a computed value out
 846                                 elem.runtimeStyle.left = elem.currentStyle.left;
 847                                 style.left = ret || 0;
 848                                 ret = style.pixelLeft + "px";
 849
 850                                 // Revert the changed values
 851                                 style.left = left;
 852                                 elem.runtimeStyle.left = rsLeft;
 853                         }
 854                 }
 855
 856                 return ret;
 857         },
 858
 859         clean: function( elems, context, fragment ) {
 860                 context = context || document;
 861
 862                 // !context.createElement fails in IE with an error but returns typeof 'object'
 863                 if ( typeof context.createElement === "undefined" )
 864                         context = context.ownerDocument || context[0] && context[0].ownerDocument || document;
 865
 866                 // If a single string is passed in and it's a single tag
 867                 // just do a createElement and skip the rest
 868                 if ( !fragment && elems.length === 1 && typeof elems[0] === "string" ) {
 869                         var match = /^<(\w+)\s*\/?>$/.exec(elems[0]);
 870                         if ( match )
 871                                 return [ context.createElement( match[1] ) ];
 872                 }
 873
 874                 var ret = [], scripts = [], div = context.createElement("div");
 875
 876                 jQuery.each(elems, function(i, elem){
 877                         if ( typeof elem === "number" )
 878                                 elem += '';
 879
 880                         if ( !elem )
 881                                 return;
 882
 883                         // Convert html string into DOM nodes
 884                         if ( typeof elem === "string" ) {
 885                                 // Fix "XHTML"-style tags in all browsers
 886                                 elem = elem.replace(/(<(\w+)[^>]*?)\/>/g, function(all, front, tag){
 887                                         return tag.match(/^(abbr|br|col|img|input|link|meta|param|hr|area|embed)$/i) ?
 888                                                 all :
 889                                                 front + "></" + tag + ">";
 890                                 });
 891
 892                                 // Trim whitespace, otherwise indexOf won't work as expected
 893                                 var tags = elem.replace(/^\s+/, "").substring(0, 10).toLowerCase();
 894
 895                                 var wrap =
 896                                         // option or optgroup
 897                                         !tags.indexOf("<opt") &&
 898                                         [ 1, "<select multiple='multiple'>", "</select>" ] ||
 899
 900                                         !tags.indexOf("<leg") &&
 901                                         [ 1, "<fieldset>", "</fieldset>" ] ||
 902
 903                                         tags.match(/^<(thead|tbody|tfoot|colg|cap)/) &&
 904                                         [ 1, "<table>", "</table>" ] ||
 905
 906                                         !tags.indexOf("<tr") &&
 907                                         [ 2, "<table><tbody>", "</tbody></table>" ] ||
 908
 909                                         // <thead> matched above
 910                                         (!tags.indexOf("<td") || !tags.indexOf("<th")) &&
 911                                         [ 3, "<table><tbody><tr>", "</tr></tbody></table>" ] ||
 912
 913                                         !tags.indexOf("<col") &&
 914                                         [ 2, "<table><tbody></tbody><colgroup>", "</colgroup></table>" ] ||
 915
 916                                         // IE can't serialize <link> and <script> tags normally
 917                                         !jQuery.support.htmlSerialize &&
 918                                         [ 1, "div<div>", "</div>" ] ||
 919
 920                                         [ 0, "", "" ];
 921
 922                                 // Go to html and back, then peel off extra wrappers
 923                                 div.innerHTML = wrap[1] + elem + wrap[2];
 924
 925                                 // Move to the right depth
 926                                 while ( wrap[0]-- )
 927                                         div = div.lastChild;
 928
 929                                 // Remove IE's autoinserted <tbody> from table fragments
 930                                 if ( !jQuery.support.tbody ) {
 931
 932                                         // String was a <table>, *may* have spurious <tbody>
 933                                         var hasBody = /<tbody/i.test(elem),
 934                                                 tbody = !tags.indexOf("<table") && !hasBody ?
 935                                                         div.firstChild && div.firstChild.childNodes :
 936
 937                                                 // String was a bare <thead> or <tfoot>
 938                                                 wrap[1] == "<table>" && !hasBody ?
 939                                                         div.childNodes :
 940                                                         [];
 941
 942                                         for ( var j = tbody.length - 1; j >= 0 ; --j )
 943                                                 if ( jQuery.nodeName( tbody[ j ], "tbody" ) && !tbody[ j ].childNodes.length )
 944                                                         tbody[ j ].parentNode.removeChild( tbody[ j ] );
 945
 946                                         }
 947
 948                                 // IE completely kills leading whitespace when innerHTML is used
 949                                 if ( !jQuery.support.leadingWhitespace && /^\s/.test( elem ) )
 950                                         div.insertBefore( context.createTextNode( elem.match(/^\s*/)[0] ), div.firstChild );
 951
 952                                 elem = jQuery.makeArray( div.childNodes );
 953                         }
 954
 955                         if ( elem.nodeType )
 956                                 ret.push( elem );
 957                         else
 958                                 ret = jQuery.merge( ret, elem );
 959
 960                 });
 961
 962                 if ( fragment ) {
 963                         for ( var i = 0; ret[i]; i++ ) {
 964                                 if ( jQuery.nodeName( ret[i], "script" ) && (!ret[i].type || ret[i].type.toLowerCase() === "text/javascript") ) {
 965                                         scripts.push( ret[i].parentNode ? ret[i].parentNode.removeChild( ret[i] ) : ret[i] );
 966                                 } else {
 967                                         if ( ret[i].nodeType === 1 )
 968                                                 ret.splice.apply( ret, [i + 1, 0].concat(jQuery.makeArray(ret[i].getElementsByTagName("script"))) );
 969                                         fragment.appendChild( ret[i] );
 970                                 }
 971                         }
 972
 973                         return scripts;
 974                 }
 975
 976                 return ret;
 977         },
 978
 979         attr: function( elem, name, value ) {
 980                 // don't set attributes on text and comment nodes
 981                 if (!elem || elem.nodeType == 3 || elem.nodeType == 8)
 982                         return undefined;
 983
 984                 var notxml = !elem.tagName || !jQuery.isXMLDoc( elem ),
 985                         // Whether we are setting (or getting)
 986                         set = value !== undefined;
 987
 988                 // Try to normalize/fix the name
 989                 name = notxml && jQuery.props[ name ] || name;
 990
 991                 // Only do all the following if this is a node (faster for style)
 992                 // IE elem.getAttribute passes even for style
 993                 if ( elem.tagName ) {
 994
 995                         // These attributes require special treatment
 996                         var special = /href|src|style/.test( name );
 997
 998                         // Safari mis-reports the default selected property of a hidden option
 999                         // Accessing the parent's selectedIndex property fixes it
1000                         if ( name == "selected" && elem.parentNode )
1001                                 elem.parentNode.selectedIndex;
1002
1003                         // If applicable, access the attribute via the DOM 0 way
1004                         if ( name in elem && notxml && !special ) {
1005                                 if ( set ){
1006                                         // We can't allow the type property to be changed (since it causes problems in IE)
1007                                         if ( name == "type" && jQuery.nodeName( elem, "input" ) && elem.parentNode )
1008                                                 throw "type property can't be changed";
1009
1010                                         elem[ name ] = value;
1011                                 }
1012
1013                                 // browsers index elements by id/name on forms, give priority to attributes.
1014                                 if( jQuery.nodeName( elem, "form" ) && elem.getAttributeNode(name) )
1015                                         return elem.getAttributeNode( name ).nodeValue;
1016
1017                                 // elem.tabIndex doesn't always return the correct value when it hasn't been explicitly set
1018                                 // http://fluidproject.org/blog/2008/01/09/getting-setting-and-removing-tabindex-values-with-javascript/
1019                                 if ( name == "tabIndex" ) {
1020                                         var attributeNode = elem.getAttributeNode( "tabIndex" );
1021                                         return attributeNode && attributeNode.specified
1022                                                 ? attributeNode.value
1023                                                 : elem.nodeName.match(/(button|input|object|select|textarea)/i)
1024                                                         ? 0
1025                                                         : elem.nodeName.match(/^(a|area)$/i) && elem.href
1026                                                                 ? 0
1027                                                                 : undefined;
1028                                 }
1029
1030                                 return elem[ name ];
1031                         }
1032
1033                         if ( !jQuery.support.style && notxml &&  name == "style" )
1034                                 return jQuery.attr( elem.style, "cssText", value );
1035
1036                         if ( set )
1037                                 // convert the value to a string (all browsers do this but IE) see #1070
1038                                 elem.setAttribute( name, "" + value );
1039
1040                         var attr = !jQuery.support.hrefNormalized && notxml && special
1041                                         // Some attributes require a special call on IE
1042                                         ? elem.getAttribute( name, 2 )
1043                                         : elem.getAttribute( name );
1044
1045                         // Non-existent attributes return null, we normalize to undefined
1046                         return attr === null ? undefined : attr;
1047                 }
1048
1049                 // elem is actually elem.style ... set the style
1050
1051                 // IE uses filters for opacity
1052                 if ( !jQuery.support.opacity && name == "opacity" ) {
1053                         if ( set ) {
1054                                 // IE has trouble with opacity if it does not have layout
1055                                 // Force it by setting the zoom level
1056                                 elem.zoom = 1;
1057
1058                                 // Set the alpha filter to set the opacity
1059                                 elem.filter = (elem.filter || "").replace( /alpha\([^)]*\)/, "" ) +
1060                                         (parseInt( value ) + '' == "NaN" ? "" : "alpha(opacity=" + value * 100 + ")");
1061                         }
1062
1063                         return elem.filter && elem.filter.indexOf("opacity=") >= 0 ?
1064                                 (parseFloat( elem.filter.match(/opacity=([^)]*)/)[1] ) / 100) + '':
1065                                 "";
1066                 }
1067
1068                 name = name.replace(/-([a-z])/ig, function(all, letter){
1069                         return letter.toUpperCase();
1070                 });
1071
1072                 if ( set )
1073                         elem[ name ] = value;
1074
1075                 return elem[ name ];
1076         },
1077
1078         trim: function( text ) {
1079                 return (text || "").replace( /^\s+|\s+$/g, "" );
1080         },
1081
1082         makeArray: function( array ) {
1083                 var ret = [];
1084
1085                 if( array != null ){
1086                         var i = array.length;
1087                         // The window, strings (and functions) also have 'length'
1088                         if( i == null || typeof array === "string" || jQuery.isFunction(array) || array.setInterval )
1089                                 ret[0] = array;
1090                         else
1091                                 while( i )
1092                                         ret[--i] = array[i];
1093                 }
1094
1095                 return ret;
1096         },
1097
1098         inArray: function( elem, array ) {
1099                 for ( var i = 0, length = array.length; i < length; i++ )
1100                 // Use === because on IE, window == document
1101                         if ( array[ i ] === elem )
1102                                 return i;
1103
1104                 return -1;
1105         },
1106
1107         merge: function( first, second ) {
1108                 // We have to loop this way because IE & Opera overwrite the length
1109                 // expando of getElementsByTagName
1110                 var i = 0, elem, pos = first.length;
1111                 // Also, we need to make sure that the correct elements are being returned
1112                 // (IE returns comment nodes in a '*' query)
1113                 if ( !jQuery.support.getAll ) {
1114                         while ( (elem = second[ i++ ]) != null )
1115                                 if ( elem.nodeType != 8 )
1116                                         first[ pos++ ] = elem;
1117
1118                 } else
1119                         while ( (elem = second[ i++ ]) != null )
1120                                 first[ pos++ ] = elem;
1121
1122                 return first;
1123         },
1124
1125         unique: function( array ) {
1126                 var ret = [], done = {};
1127
1128                 try {
1129
1130                         for ( var i = 0, length = array.length; i < length; i++ ) {
1131                                 var id = jQuery.data( array[ i ] );
1132
1133                                 if ( !done[ id ] ) {
1134                                         done[ id ] = true;
1135                                         ret.push( array[ i ] );
1136                                 }
1137                         }
1138
1139                 } catch( e ) {
1140                         ret = array;
1141                 }
1142
1143                 return ret;
1144         },
1145
1146         grep: function( elems, callback, inv ) {
1147                 var ret = [];
1148
1149                 // Go through the array, only saving the items
1150                 // that pass the validator function
1151                 for ( var i = 0, length = elems.length; i < length; i++ )
1152                         if ( !inv != !callback( elems[ i ], i ) )
1153                                 ret.push( elems[ i ] );
1154
1155                 return ret;
1156         },
1157
1158         map: function( elems, callback ) {
1159                 var ret = [];
1160
1161                 // Go through the array, translating each of the items to their
1162                 // new value (or values).
1163                 for ( var i = 0, length = elems.length; i < length; i++ ) {
1164                         var value = callback( elems[ i ], i );
1165
1166                         if ( value != null )
1167                                 ret[ ret.length ] = value;
1168                 }
1169
1170                 return ret.concat.apply( [], ret );
1171         }
1172 });
1173
1174 // All jQuery objects should point back to these
1175 var rootjQuery = jQuery(document);
1176
1177 // Use of jQuery.browser is deprecated.
1178 // It's included for backwards compatibility and plugins,
1179 // although they should work to migrate away.
1180
1181 var userAgent = navigator.userAgent.toLowerCase();
1182
1183 // Figure out what browser is being used
1184 jQuery.browser = {
1185         version: (userAgent.match( /.+(?:rv|it|ra|ie)[\/: ]([\d.]+)/ ) || [0,'0'])[1],
1186         safari: /webkit/.test( userAgent ),
1187         opera: /opera/.test( userAgent ),
1188         msie: /msie/.test( userAgent ) && !/opera/.test( userAgent ),
1189         mozilla: /mozilla/.test( userAgent ) && !/(compatible|webkit)/.test( userAgent )
1190 };
1191
1192 jQuery.each({
1193         parent: function(elem){return elem.parentNode;},
1194         parents: function(elem){return jQuery.dir(elem,"parentNode");},
1195         next: function(elem){return jQuery.nth(elem,2,"nextSibling");},
1196         prev: function(elem){return jQuery.nth(elem,2,"previousSibling");},
1197         nextAll: function(elem){return jQuery.dir(elem,"nextSibling");},
1198         prevAll: function(elem){return jQuery.dir(elem,"previousSibling");},
1199         siblings: function(elem){return jQuery.sibling(elem.parentNode.firstChild,elem);},
1200         children: function(elem){return jQuery.sibling(elem.firstChild);},
1201         contents: function(elem){return jQuery.nodeName(elem,"iframe")?elem.contentDocument||elem.contentWindow.document:jQuery.makeArray(elem.childNodes);}
1202 }, function(name, fn){
1203         jQuery.fn[ name ] = function( selector ) {
1204                 var ret = jQuery.map( this, fn );
1205
1206                 if ( selector && typeof selector == "string" )
1207                         ret = jQuery.multiFilter( selector, ret );
1208
1209                 return this.pushStack( jQuery.unique( ret ), name, selector );
1210         };
1211 });
1212
1213 jQuery.each({
1214         appendTo: "append",
1215         prependTo: "prepend",
1216         insertBefore: "before",
1217         insertAfter: "after",
1218         replaceAll: "replaceWith"
1219 }, function(name, original){
1220         jQuery.fn[ name ] = function( selector ) {
1221                 var ret = [], insert = jQuery( selector );
1222
1223                 for ( var i = 0, l = insert.length; i < l; i++ ) {
1224                         var elems = (i > 0 ? this.clone(true) : this).get();
1225                         jQuery.fn[ original ].apply( jQuery(insert[i]), elems );
1226                         ret = ret.concat( elems );
1227                 }
1228
1229                 return this.pushStack( ret, name, selector );
1230         };
1231 });
1232
1233 jQuery.each({
1234         removeAttr: function( name ) {
1235                 jQuery.attr( this, name, "" );
1236                 if (this.nodeType == 1)
1237                         this.removeAttribute( name );
1238         },
1239
1240         addClass: function( classNames ) {
1241                 jQuery.className.add( this, classNames );
1242         },
1243
1244         removeClass: function( classNames ) {
1245                 jQuery.className.remove( this, classNames );
1246         },
1247
1248         toggleClass: function( classNames, state ) {
1249                 if( typeof state !== "boolean" )
1250                         state = !jQuery.className.has( this, classNames );
1251                 jQuery.className[ state ? "add" : "remove" ]( this, classNames );
1252         },
1253
1254         remove: function( selector ) {
1255                 if ( !selector || jQuery.multiFilter( selector, [ this ] ).length ) {
1256                         if ( this.nodeType === 1 ) {
1257                                 cleanData( this.getElementsByTagName("*") );
1258                                 cleanData( [this] );
1259                         }
1260
1261                         if ( this.parentNode ) {
1262                                 this.parentNode.removeChild( this );
1263                         }
1264                 }
1265         },
1266
1267         empty: function() {
1268                 // Remove element nodes and prevent memory leaks
1269                 if ( this.nodeType === 1 ) {
1270                         cleanData( this.getElementsByTagName("*") );
1271                 }
1272
1273                 // Remove any remaining nodes
1274                 while ( this.firstChild ) {
1275                         this.removeChild( this.firstChild );
1276                 }
1277         }
1278 }, function(name, fn){
1279         jQuery.fn[ name ] = function(){
1280                 return this.each( fn, arguments );
1281         };
1282 });
1283
1284 function cleanData( elems ) {
1285         for ( var i = 0, l = elems.length; i < l; i++ ) {
1286                 var id = elems[i][expando];
1287                 if ( id ) {
1288                         delete jQuery.cache[ id ];
1289                 }
1290         }
1291 }