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 new jQuery.fn.init( selector, context );
  14         },
  15
  16         // A simple way to check for HTML strings or ID strings
  17         // (both of which we optimize for)
  18         quickExpr = /^[^<]*(<(.|\s)+>)[^>]*$|^#([\w-]+)$/,
  19         // Is it a simple selector
  20         isSimple = /^.[^:#\[\.,]*$/;
  21
  22 jQuery.fn = jQuery.prototype = {
  23         init: function( selector, context ) {
  24                 // Make sure that a selection was provided
  25                 selector = selector || document;
  26
  27                 // Handle $(DOMElement)
  28                 if ( selector.nodeType ) {
  29                         this[0] = selector;
  30                         this.length = 1;
  31                         this.context = selector;
  32                         return this;
  33                 }
  34                 // Handle HTML strings
  35                 if ( typeof selector === "string" ) {
  36                         // Are we dealing with HTML string or an ID?
  37                         var match = quickExpr.exec( selector );
  38
  39                         // Verify a match, and that no context was specified for #id
  40                         if ( match && (match[1] || !context) ) {
  41
  42                                 // HANDLE: $(html) -> $(array)
  43                                 if ( match[1] )
  44                                         selector = jQuery.clean( [ match[1] ], context );
  45
  46                                 // HANDLE: $("#id")
  47                                 else {
  48                                         var elem = document.getElementById( match[3] );
  49
  50                                         // Handle the case where IE and Opera return items
  51                                         // by name instead of ID
  52                                         if ( elem && elem.id != match[3] )
  53                                                 return jQuery().find( selector );
  54
  55                                         // Otherwise, we inject the element directly into the jQuery object
  56                                         var ret = jQuery( elem || [] );
  57                                         ret.context = document;
  58                                         ret.selector = selector;
  59                                         return ret;
  60                                 }
  61
  62                         // HANDLE: $(expr, [context])
  63                         // (which is just equivalent to: $(content).find(expr)
  64                         } else
  65                                 return jQuery( context ).find( selector );
  66
  67                 // HANDLE: $(function)
  68                 // Shortcut for document ready
  69                 } else if ( jQuery.isFunction( selector ) )
  70                         return jQuery( document ).ready( selector );
  71
  72                 // Make sure that old selector state is passed along
  73                 if ( selector.selector && selector.context ) {
  74                         this.selector = selector.selector;
  75                         this.context = selector.context;
  76                 }
  77
  78                 return this.setArray(jQuery.isArray( selector ) ?
  79                         selector :
  80                         jQuery.makeArray(selector));
  81         },
  82
  83         // Start with an empty selector
  84         selector: "",
  85
  86         // The current version of jQuery being used
  87         jquery: "@VERSION",
  88
  89         // The number of elements contained in the matched element set
  90         size: function() {
  91                 return this.length;
  92         },
  93
  94         // Get the Nth element in the matched element set OR
  95         // Get the whole matched element set as a clean array
  96         get: function( num ) {
  97                 return num === undefined ?
  98
  99                         // Return a 'clean' array
 100                         Array.prototype.slice.call( this ) :
 101
 102                         // Return just the object
 103                         this[ num ];
 104         },
 105
 106         // Take an array of elements and push it onto the stack
 107         // (returning the new matched element set)
 108         pushStack: function( elems, name, selector ) {
 109                 // Build a new jQuery matched element set
 110                 var ret = jQuery( elems );
 111
 112                 // Add the old object onto the stack (as a reference)
 113                 ret.prevObject = this;
 114
 115                 ret.context = this.context;
 116
 117                 if ( name === "find" )
 118                         ret.selector = this.selector + (this.selector ? " " : "") + selector;
 119                 else if ( name )
 120                         ret.selector = this.selector + "." + name + "(" + selector + ")";
 121
 122                 // Return the newly-formed element set
 123                 return ret;
 124         },
 125
 126         // Force the current matched set of elements to become
 127         // the specified array of elements (destroying the stack in the process)
 128         // You should use pushStack() in order to do this, but maintain the stack
 129         setArray: function( elems ) {
 130                 // Resetting the length to 0, then using the native Array push
 131                 // is a super-fast way to populate an object with array-like properties
 132                 this.length = 0;
 133                 Array.prototype.push.apply( this, elems );
 134
 135                 return this;
 136         },
 137
 138         // Execute a callback for every element in the matched set.
 139         // (You can seed the arguments with an array of args, but this is
 140         // only used internally.)
 141         each: function( callback, args ) {
 142                 return jQuery.each( this, callback, args );
 143         },
 144
 145         // Determine the position of an element within
 146         // the matched set of elements
 147         index: function( elem ) {
 148                 // Locate the position of the desired element
 149                 return jQuery.inArray(
 150                         // If it receives a jQuery object, the first element is used
 151                         elem && elem.jquery ? elem[0] : elem
 152                 , this );
 153         },
 154
 155         attr: function( name, value, type ) {
 156                 var options = name;
 157
 158                 // Look for the case where we're accessing a style value
 159                 if ( typeof name === "string" )
 160                         if ( value === undefined )
 161                                 return this[0] && jQuery[ type || "attr" ]( this[0], name );
 162
 163                         else {
 164                                 options = {};
 165                                 options[ name ] = value;
 166                         }
 167
 168                 // Check to see if we're setting style values
 169                 return this.each(function(i){
 170                         // Set all the styles
 171                         for ( name in options )
 172                                 jQuery.attr(
 173                                         type ?
 174                                                 this.style :
 175                                                 this,
 176                                         name, jQuery.prop( this, options[ name ], type, i, name )
 177                                 );
 178                 });
 179         },
 180
 181         css: function( key, value ) {
 182                 // ignore negative width and height values
 183                 if ( (key == 'width' || key == 'height') && parseFloat(value) < 0 )
 184                         value = undefined;
 185                 return this.attr( key, value, "curCSS" );
 186         },
 187
 188         text: function( text ) {
 189                 if ( typeof text !== "object" && text != null )
 190                         return this.empty().append( (this[0] && this[0].ownerDocument || document).createTextNode( text ) );
 191
 192                 var ret = "";
 193
 194                 jQuery.each( text || this, function(){
 195                         jQuery.each( this.childNodes, function(){
 196                                 if ( this.nodeType != 8 )
 197                                         ret += this.nodeType != 1 ?
 198                                                 this.nodeValue :
 199                                                 jQuery.fn.text( [ this ] );
 200                         });
 201                 });
 202
 203                 return ret;
 204         },
 205
 206         wrapAll: function( html ) {
 207                 if ( this[0] ) {
 208                         // The elements to wrap the target around
 209                         var wrap = jQuery( html, this[0].ownerDocument ).clone();
 210
 211                         if ( this[0].parentNode )
 212                                 wrap.insertBefore( this[0] );
 213
 214                         wrap.map(function(){
 215                                 var elem = this;
 216
 217                                 while ( elem.firstChild )
 218                                         elem = elem.firstChild;
 219
 220                                 return elem;
 221                         }).append(this);
 222                 }
 223
 224                 return this;
 225         },
 226
 227         wrapInner: function( html ) {
 228                 return this.each(function(){
 229                         jQuery( this ).contents().wrapAll( html );
 230                 });
 231         },
 232
 233         wrap: function( html ) {
 234                 return this.each(function(){
 235                         jQuery( this ).wrapAll( html );
 236                 });
 237         },
 238
 239         append: function() {
 240                 return this.domManip(arguments, true, function(elem){
 241                         if (this.nodeType == 1)
 242                                 this.appendChild( elem );
 243                 });
 244         },
 245
 246         prepend: function() {
 247                 return this.domManip(arguments, true, function(elem){
 248                         if (this.nodeType == 1)
 249                                 this.insertBefore( elem, this.firstChild );
 250                 });
 251         },
 252
 253         before: function() {
 254                 return this.domManip(arguments, false, function(elem){
 255                         this.parentNode.insertBefore( elem, this );
 256                 });
 257         },
 258
 259         after: function() {
 260                 return this.domManip(arguments, false, function(elem){
 261                         this.parentNode.insertBefore( elem, this.nextSibling );
 262                 });
 263         },
 264
 265         end: function() {
 266                 return this.prevObject || jQuery( [] );
 267         },
 268
 269         // For internal use only.
 270         // Behaves like an Array's .push method, not like a jQuery method.
 271         push: [].push,
 272
 273         find: function( selector ) {
 274                 if ( this.length === 1 ) {
 275                         var ret = this.pushStack( [], "find", selector );
 276                         ret.length = 0;
 277                         jQuery.find( selector, this[0], ret );
 278                         return ret;
 279                 } else {
 280                         return this.pushStack( jQuery.unique(jQuery.map(this, function(elem){
 281                                 return jQuery.find( selector, elem );
 282                         })), "find", selector );
 283                 }
 284         },
 285
 286         clone: function( events ) {
 287                 // Do the clone
 288                 var ret = this.map(function(){
 289                         if ( !jQuery.support.noCloneEvent && !jQuery.isXMLDoc(this) ) {
 290                                 // IE copies events bound via attachEvent when
 291                                 // using cloneNode. Calling detachEvent on the
 292                                 // clone will also remove the events from the orignal
 293                                 // In order to get around this, we use innerHTML.
 294                                 // Unfortunately, this means some modifications to
 295                                 // attributes in IE that are actually only stored
 296                                 // as properties will not be copied (such as the
 297                                 // the name attribute on an input).
 298                                 var html = this.outerHTML;
 299                                 if ( !html ) {
 300                                         var div = this.ownerDocument.createElement("div");
 301                                         div.appendChild( this.cloneNode(true) );
 302                                         html = div.innerHTML;
 303                                 }
 304
 305                                 return jQuery.clean([html.replace(/ jQuery\d+="(?:\d+|null)"/g, "").replace(/^\s*/, "")])[0];
 306                         } else
 307                                 return this.cloneNode(true);
 308                 });
 309
 310                 // Copy the events from the original to the clone
 311                 if ( events === true ) {
 312                         var orig = this.find("*").andSelf(), i = 0;
 313
 314                         ret.find("*").andSelf().each(function(){
 315                                 if ( this.nodeName !== orig[i].nodeName )
 316                                         return;
 317
 318                                 var events = jQuery.data( orig[i], "events" );
 319
 320                                 for ( var type in events ) {
 321                                         for ( var handler in events[ type ] ) {
 322                                                 jQuery.event.add( this, type, events[ type ][ handler ], events[ type ][ handler ].data );
 323                                         }
 324                                 }
 325
 326                                 i++;
 327                         });
 328                 }
 329
 330                 // Return the cloned set
 331                 return ret;
 332         },
 333
 334         filter: function( selector ) {
 335                 return this.pushStack(
 336                         jQuery.isFunction( selector ) &&
 337                         jQuery.grep(this, function(elem, i){
 338                                 return selector.call( elem, i );
 339                         }) ||
 340
 341                         jQuery.multiFilter( selector, jQuery.grep(this, function(elem){
 342                                 return elem.nodeType === 1;
 343                         }) ), "filter", selector );
 344         },
 345
 346         closest: function( selector ) {
 347                 var pos = jQuery.expr.match.POS.test( selector ) ? jQuery(selector) : null,
 348                         closer = 0;
 349
 350                 return this.map(function(){
 351                         var cur = this;
 352                         while ( cur && cur.ownerDocument ) {
 353                                 if ( pos ? pos.index(cur) > -1 : jQuery(cur).is(selector) ) {
 354                                         jQuery.data(cur, "closest", closer);
 355                                         return cur;
 356                                 }
 357                                 cur = cur.parentNode;
 358                                 closer++;
 359                         }
 360                 });
 361         },
 362
 363         not: function( selector ) {
 364                 if ( typeof selector === "string" )
 365                         // test special case where just one selector is passed in
 366                         if ( isSimple.test( selector ) )
 367                                 return this.pushStack( jQuery.multiFilter( selector, this, true ), "not", selector );
 368                         else
 369                                 selector = jQuery.multiFilter( selector, this );
 370
 371                 var isArrayLike = selector.length && selector[selector.length - 1] !== undefined && !selector.nodeType;
 372                 return this.filter(function() {
 373                         return isArrayLike ? jQuery.inArray( this, selector ) < 0 : this != selector;
 374                 });
 375         },
 376
 377         add: function( selector ) {
 378                 return this.pushStack( jQuery.unique( jQuery.merge(
 379                         this.get(),
 380                         typeof selector === "string" ?
 381                                 jQuery( selector ) :
 382                                 jQuery.makeArray( selector )
 383                 )));
 384         },
 385
 386         is: function( selector ) {
 387                 return !!selector && jQuery.multiFilter( selector, this ).length > 0;
 388         },
 389
 390         hasClass: function( selector ) {
 391                 return !!selector && this.is( "." + selector );
 392         },
 393
 394         val: function( value ) {
 395                 if ( value === undefined ) {
 396                         var elem = this[0];
 397
 398                         if ( elem ) {
 399                                 if( jQuery.nodeName( elem, 'option' ) )
 400                                         return (elem.attributes.value || {}).specified ? elem.value : elem.text;
 401
 402                                 // We need to handle select boxes special
 403                                 if ( jQuery.nodeName( elem, "select" ) ) {
 404                                         var index = elem.selectedIndex,
 405                                                 values = [],
 406                                                 options = elem.options,
 407                                                 one = elem.type == "select-one";
 408
 409                                         // Nothing was selected
 410                                         if ( index < 0 )
 411                                                 return null;
 412
 413                                         // Loop through all the selected options
 414                                         for ( var i = one ? index : 0, max = one ? index + 1 : options.length; i < max; i++ ) {
 415                                                 var option = options[ i ];
 416
 417                                                 if ( option.selected ) {
 418                                                         // Get the specifc value for the option
 419                                                         value = jQuery(option).val();
 420
 421                                                         // We don't need an array for one selects
 422                                                         if ( one )
 423                                                                 return value;
 424
 425                                                         // Multi-Selects return an array
 426                                                         values.push( value );
 427                                                 }
 428                                         }
 429
 430                                         return values;
 431                                 }
 432
 433                                 // Everything else, we just grab the value
 434                                 return (elem.value || "").replace(/\r/g, "");
 435
 436                         }
 437
 438                         return undefined;
 439                 }
 440
 441                 if ( typeof value === "number" )
 442                         value += '';
 443
 444                 return this.each(function(){
 445                         if ( this.nodeType != 1 )
 446                                 return;
 447
 448                         if ( jQuery.isArray(value) && /radio|checkbox/.test( this.type ) )
 449                                 this.checked = (jQuery.inArray(this.value, value) >= 0 ||
 450                                         jQuery.inArray(this.name, value) >= 0);
 451
 452                         else if ( jQuery.nodeName( this, "select" ) ) {
 453                                 var values = jQuery.makeArray(value);
 454
 455                                 jQuery( "option", this ).each(function(){
 456                                         this.selected = (jQuery.inArray( this.value, values ) >= 0 ||
 457                                                 jQuery.inArray( this.text, values ) >= 0);
 458                                 });
 459
 460                                 if ( !values.length )
 461                                         this.selectedIndex = -1;
 462
 463                         } else
 464                                 this.value = value;
 465                 });
 466         },
 467
 468         html: function( value ) {
 469                 return value === undefined ?
 470                         (this[0] ?
 471                                 this[0].innerHTML.replace(/ jQuery\d+="(?:\d+|null)"/g, "") :
 472                                 null) :
 473                         this.empty().append( value );
 474         },
 475
 476         replaceWith: function( value ) {
 477                 return this.after( value ).remove();
 478         },
 479
 480         eq: function( i ) {
 481                 return this.slice( i, +i + 1 );
 482         },
 483
 484         slice: function() {
 485                 return this.pushStack( Array.prototype.slice.apply( this, arguments ),
 486                         "slice", Array.prototype.slice.call(arguments).join(",") );
 487         },
 488
 489         map: function( callback ) {
 490                 return this.pushStack( jQuery.map(this, function(elem, i){
 491                         return callback.call( elem, i, elem );
 492                 }));
 493         },
 494
 495         andSelf: function() {
 496                 return this.add( this.prevObject );
 497         },
 498
 499         domManip: function( args, table, callback ) {
 500                 if ( this[0] ) {
 501                         var fragment = (this[0].ownerDocument || this[0]).createDocumentFragment(),
 502                                 scripts = jQuery.clean( args, (this[0].ownerDocument || this[0]), fragment ),
 503                                 first = fragment.firstChild,
 504                                 extra = this.length > 1 ? fragment.cloneNode(true) : fragment;
 505
 506                         if ( first )
 507                                 for ( var i = 0, l = this.length; i < l; i++ )
 508                                         callback.call( root(this[i], first), i > 0 ? extra.cloneNode(true) : fragment );
 509
 510                         if ( scripts )
 511                                 jQuery.each( scripts, evalScript );
 512                 }
 513
 514                 return this;
 515
 516                 function root( elem, cur ) {
 517                         return table && jQuery.nodeName(elem, "table") && jQuery.nodeName(cur, "tr") ?
 518                                 (elem.getElementsByTagName("tbody")[0] ||
 519                                 elem.appendChild(elem.ownerDocument.createElement("tbody"))) :
 520                                 elem;
 521                 }
 522         }
 523 };
 524
 525 // Give the init function the jQuery prototype for later instantiation
 526 jQuery.fn.init.prototype = jQuery.fn;
 527
 528 function evalScript( i, elem ) {
 529         if ( elem.src )
 530                 jQuery.ajax({
 531                         url: elem.src,
 532                         async: false,
 533                         dataType: "script"
 534                 });
 535
 536         else
 537                 jQuery.globalEval( elem.text || elem.textContent || elem.innerHTML || "" );
 538
 539         if ( elem.parentNode )
 540                 elem.parentNode.removeChild( elem );
 541 }
 542
 543 function now(){
 544         return +new Date;
 545 }
 546
 547 jQuery.extend = jQuery.fn.extend = function() {
 548         // copy reference to target object
 549         var target = arguments[0] || {}, i = 1, length = arguments.length, deep = false, options;
 550
 551         // Handle a deep copy situation
 552         if ( typeof target === "boolean" ) {
 553                 deep = target;
 554                 target = arguments[1] || {};
 555                 // skip the boolean and the target
 556                 i = 2;
 557         }
 558
 559         // Handle case when target is a string or something (possible in deep copy)
 560         if ( typeof target !== "object" && !jQuery.isFunction(target) )
 561                 target = {};
 562
 563         // extend jQuery itself if only one argument is passed
 564         if ( length == i ) {
 565                 target = this;
 566                 --i;
 567         }
 568
 569         for ( ; i < length; i++ )
 570                 // Only deal with non-null/undefined values
 571                 if ( (options = arguments[ i ]) != null )
 572                         // Extend the base object
 573                         for ( var name in options ) {
 574                                 var src = target[ name ], copy = options[ name ];
 575
 576                                 // Prevent never-ending loop
 577                                 if ( target === copy )
 578                                         continue;
 579
 580                                 // Recurse if we're merging object values
 581                                 if ( deep && copy && typeof copy === "object" && !copy.nodeType )
 582                                         target[ name ] = jQuery.extend( deep,
 583                                                 // Never move original objects, clone them
 584                                                 src || ( copy.length != null ? [ ] : { } )
 585                                         , copy );
 586
 587                                 // Don't bring in undefined values
 588                                 else if ( copy !== undefined )
 589                                         target[ name ] = copy;
 590
 591                         }
 592
 593         // Return the modified object
 594         return target;
 595 };
 596
 597 // exclude the following css properties to add px
 598 var     exclude = /z-?index|font-?weight|opacity|zoom|line-?height/i,
 599         // cache defaultView
 600         defaultView = document.defaultView || {},
 601         toString = Object.prototype.toString;
 602
 603 jQuery.extend({
 604         noConflict: function( deep ) {
 605                 window.$ = _$;
 606
 607                 if ( deep )
 608                         window.jQuery = _jQuery;
 609
 610                 return jQuery;
 611         },
 612
 613         // See test/unit/core.js for details concerning isFunction.
 614         // Since version 1.3, DOM methods and functions like alert
 615         // aren't supported. They return false on IE (#2968).
 616         isFunction: function( obj ) {
 617                 return toString.call(obj) === "[object Function]";
 618         },
 619
 620         isArray: function( obj ) {
 621                 return toString.call(obj) === "[object Array]";
 622         },
 623
 624         // check if an element is in a (or is an) XML document
 625         isXMLDoc: function( elem ) {
 626                 return elem.nodeType === 9 && elem.documentElement.nodeName !== "HTML" ||
 627                         !!elem.ownerDocument && jQuery.isXMLDoc( elem.ownerDocument );
 628         },
 629
 630         // Evalulates a script in a global context
 631         globalEval: function( data ) {
 632                 if ( data && /\S/.test(data) ) {
 633                         // Inspired by code by Andrea Giammarchi
 634                         // http://webreflection.blogspot.com/2007/08/global-scope-evaluation-and-dom.html
 635                         var head = document.getElementsByTagName("head")[0] || document.documentElement,
 636                                 script = document.createElement("script");
 637
 638                         script.type = "text/javascript";
 639                         if ( jQuery.support.scriptEval )
 640                                 script.appendChild( document.createTextNode( data ) );
 641                         else
 642                                 script.text = data;
 643
 644                         // Use insertBefore instead of appendChild  to circumvent an IE6 bug.
 645                         // This arises when a base node is used (#2709).
 646                         head.insertBefore( script, head.firstChild );
 647                         head.removeChild( script );
 648                 }
 649         },
 650
 651         nodeName: function( elem, name ) {
 652                 return elem.nodeName && elem.nodeName.toUpperCase() == name.toUpperCase();
 653         },
 654
 655         // args is for internal usage only
 656         each: function( object, callback, args ) {
 657                 var name, i = 0, length = object.length;
 658
 659                 if ( args ) {
 660                         if ( length === undefined ) {
 661                                 for ( name in object )
 662                                         if ( callback.apply( object[ name ], args ) === false )
 663                                                 break;
 664                         } else
 665                                 for ( ; i < length; )
 666                                         if ( callback.apply( object[ i++ ], args ) === false )
 667                                                 break;
 668
 669                 // A special, fast, case for the most common use of each
 670                 } else {
 671                         if ( length === undefined ) {
 672                                 for ( name in object )
 673                                         if ( callback.call( object[ name ], name, object[ name ] ) === false )
 674                                                 break;
 675                         } else
 676                                 for ( var value = object[0];
 677                                         i < length && callback.call( value, i, value ) !== false; value = object[++i] ){}
 678                 }
 679
 680                 return object;
 681         },
 682
 683         prop: function( elem, value, type, i, name ) {
 684                 // Handle executable functions
 685                 if ( jQuery.isFunction( value ) )
 686                         value = value.call( elem, i );
 687
 688                 // Handle passing in a number to a CSS property
 689                 return typeof value === "number" && type == "curCSS" && !exclude.test( name ) ?
 690                         value + "px" :
 691                         value;
 692         },
 693
 694         className: {
 695                 // internal only, use addClass("class")
 696                 add: function( elem, classNames ) {
 697                         jQuery.each((classNames || "").split(/\s+/), function(i, className){
 698                                 if ( elem.nodeType == 1 && !jQuery.className.has( elem.className, className ) )
 699                                         elem.className += (elem.className ? " " : "") + className;
 700                         });
 701                 },
 702
 703                 // internal only, use removeClass("class")
 704                 remove: function( elem, classNames ) {
 705                         if (elem.nodeType == 1)
 706                                 elem.className = classNames !== undefined ?
 707                                         jQuery.grep(elem.className.split(/\s+/), function(className){
 708                                                 return !jQuery.className.has( classNames, className );
 709                                         }).join(" ") :
 710                                         "";
 711                 },
 712
 713                 // internal only, use hasClass("class")
 714                 has: function( elem, className ) {
 715                         return elem && jQuery.inArray( className, (elem.className || elem).toString().split(/\s+/) ) > -1;
 716                 }
 717         },
 718
 719         // A method for quickly swapping in/out CSS properties to get correct calculations
 720         swap: function( elem, options, callback ) {
 721                 var old = {};
 722                 // Remember the old values, and insert the new ones
 723                 for ( var name in options ) {
 724                         old[ name ] = elem.style[ name ];
 725                         elem.style[ name ] = options[ name ];
 726                 }
 727
 728                 callback.call( elem );
 729
 730                 // Revert the old values
 731                 for ( var name in options )
 732                         elem.style[ name ] = old[ name ];
 733         },
 734
 735         css: function( elem, name, force, extra ) {
 736                 if ( name == "width" || name == "height" ) {
 737                         var val, props = { position: "absolute", visibility: "hidden", display:"block" }, which = name == "width" ? [ "Left", "Right" ] : [ "Top", "Bottom" ];
 738
 739                         function getWH() {
 740                                 val = name == "width" ? elem.offsetWidth : elem.offsetHeight;
 741
 742                                 if ( extra === "border" )
 743                                         return;
 744
 745                                 jQuery.each( which, function() {
 746                                         if ( !extra )
 747                                                 val -= parseFloat(jQuery.curCSS( elem, "padding" + this, true)) || 0;
 748                                         if ( extra === "margin" )
 749                                                 val += parseFloat(jQuery.curCSS( elem, "margin" + this, true)) || 0;
 750                                         else
 751                                                 val -= parseFloat(jQuery.curCSS( elem, "border" + this + "Width", true)) || 0;
 752                                 });
 753                         }
 754
 755                         if ( elem.offsetWidth !== 0 )
 756                                 getWH();
 757                         else
 758                                 jQuery.swap( elem, props, getWH );
 759
 760                         return Math.max(0, Math.round(val));
 761                 }
 762
 763                 return jQuery.curCSS( elem, name, force );
 764         },
 765
 766         curCSS: function( elem, name, force ) {
 767                 var ret, style = elem.style;
 768
 769                 // We need to handle opacity special in IE
 770                 if ( name == "opacity" && !jQuery.support.opacity ) {
 771                         ret = jQuery.attr( style, "opacity" );
 772
 773                         return ret == "" ?
 774                                 "1" :
 775                                 ret;
 776                 }
 777
 778                 // Make sure we're using the right name for getting the float value
 779                 if ( name.match( /float/i ) )
 780                         name = styleFloat;
 781
 782                 if ( !force && style && style[ name ] )
 783                         ret = style[ name ];
 784
 785                 else if ( defaultView.getComputedStyle ) {
 786
 787                         // Only "float" is needed here
 788                         if ( name.match( /float/i ) )
 789                                 name = "float";
 790
 791                         name = name.replace( /([A-Z])/g, "-$1" ).toLowerCase();
 792
 793                         var computedStyle = defaultView.getComputedStyle( elem, null );
 794
 795                         if ( computedStyle )
 796                                 ret = computedStyle.getPropertyValue( name );
 797
 798                         // We should always get a number back from opacity
 799                         if ( name == "opacity" && ret == "" )
 800                                 ret = "1";
 801
 802                 } else if ( elem.currentStyle ) {
 803                         var camelCase = name.replace(/\-(\w)/g, function(all, letter){
 804                                 return letter.toUpperCase();
 805                         });
 806
 807                         ret = elem.currentStyle[ name ] || elem.currentStyle[ camelCase ];
 808
 809                         // From the awesome hack by Dean Edwards
 810                         // http://erik.eae.net/archives/2007/07/27/18.54.15/#comment-102291
 811
 812                         // If we're not dealing with a regular pixel number
 813                         // but a number that has a weird ending, we need to convert it to pixels
 814                         if ( !/^\d+(px)?$/i.test( ret ) && /^\d/.test( ret ) ) {
 815                                 // Remember the original values
 816                                 var left = style.left, rsLeft = elem.runtimeStyle.left;
 817
 818                                 // Put in the new values to get a computed value out
 819                                 elem.runtimeStyle.left = elem.currentStyle.left;
 820                                 style.left = ret || 0;
 821                                 ret = style.pixelLeft + "px";
 822
 823                                 // Revert the changed values
 824                                 style.left = left;
 825                                 elem.runtimeStyle.left = rsLeft;
 826                         }
 827                 }
 828
 829                 return ret;
 830         },
 831
 832         clean: function( elems, context, fragment ) {
 833                 context = context || document;
 834
 835                 // !context.createElement fails in IE with an error but returns typeof 'object'
 836                 if ( typeof context.createElement === "undefined" )
 837                         context = context.ownerDocument || context[0] && context[0].ownerDocument || document;
 838
 839                 // If a single string is passed in and it's a single tag
 840                 // just do a createElement and skip the rest
 841                 if ( !fragment && elems.length === 1 && typeof elems[0] === "string" ) {
 842                         var match = /^<(\w+)\s*\/?>$/.exec(elems[0]);
 843                         if ( match )
 844                                 return [ context.createElement( match[1] ) ];
 845                 }
 846
 847                 var ret = [], scripts = [], div = context.createElement("div");
 848
 849                 jQuery.each(elems, function(i, elem){
 850                         if ( typeof elem === "number" )
 851                                 elem += '';
 852
 853                         if ( !elem )
 854                                 return;
 855
 856                         // Convert html string into DOM nodes
 857                         if ( typeof elem === "string" ) {
 858                                 // Fix "XHTML"-style tags in all browsers
 859                                 elem = elem.replace(/(<(\w+)[^>]*?)\/>/g, function(all, front, tag){
 860                                         return tag.match(/^(abbr|br|col|img|input|link|meta|param|hr|area|embed)$/i) ?
 861                                                 all :
 862                                                 front + "></" + tag + ">";
 863                                 });
 864
 865                                 // Trim whitespace, otherwise indexOf won't work as expected
 866                                 var tags = elem.replace(/^\s+/, "").substring(0, 10).toLowerCase();
 867
 868                                 var wrap =
 869                                         // option or optgroup
 870                                         !tags.indexOf("<opt") &&
 871                                         [ 1, "<select multiple='multiple'>", "</select>" ] ||
 872
 873                                         !tags.indexOf("<leg") &&
 874                                         [ 1, "<fieldset>", "</fieldset>" ] ||
 875
 876                                         tags.match(/^<(thead|tbody|tfoot|colg|cap)/) &&
 877                                         [ 1, "<table>", "</table>" ] ||
 878
 879                                         !tags.indexOf("<tr") &&
 880                                         [ 2, "<table><tbody>", "</tbody></table>" ] ||
 881
 882                                         // <thead> matched above
 883                                         (!tags.indexOf("<td") || !tags.indexOf("<th")) &&
 884                                         [ 3, "<table><tbody><tr>", "</tr></tbody></table>" ] ||
 885
 886                                         !tags.indexOf("<col") &&
 887                                         [ 2, "<table><tbody></tbody><colgroup>", "</colgroup></table>" ] ||
 888
 889                                         // IE can't serialize <link> and <script> tags normally
 890                                         !jQuery.support.htmlSerialize &&
 891                                         [ 1, "div<div>", "</div>" ] ||
 892
 893                                         [ 0, "", "" ];
 894
 895                                 // Go to html and back, then peel off extra wrappers
 896                                 div.innerHTML = wrap[1] + elem + wrap[2];
 897
 898                                 // Move to the right depth
 899                                 while ( wrap[0]-- )
 900                                         div = div.lastChild;
 901
 902                                 // Remove IE's autoinserted <tbody> from table fragments
 903                                 if ( !jQuery.support.tbody ) {
 904
 905                                         // String was a <table>, *may* have spurious <tbody>
 906                                         var hasBody = /<tbody/i.test(elem),
 907                                                 tbody = !tags.indexOf("<table") && !hasBody ?
 908                                                         div.firstChild && div.firstChild.childNodes :
 909
 910                                                 // String was a bare <thead> or <tfoot>
 911                                                 wrap[1] == "<table>" && !hasBody ?
 912                                                         div.childNodes :
 913                                                         [];
 914
 915                                         for ( var j = tbody.length - 1; j >= 0 ; --j )
 916                                                 if ( jQuery.nodeName( tbody[ j ], "tbody" ) && !tbody[ j ].childNodes.length )
 917                                                         tbody[ j ].parentNode.removeChild( tbody[ j ] );
 918
 919                                         }
 920
 921                                 // IE completely kills leading whitespace when innerHTML is used
 922                                 if ( !jQuery.support.leadingWhitespace && /^\s/.test( elem ) )
 923                                         div.insertBefore( context.createTextNode( elem.match(/^\s*/)[0] ), div.firstChild );
 924
 925                                 elem = jQuery.makeArray( div.childNodes );
 926                         }
 927
 928                         if ( elem.nodeType )
 929                                 ret.push( elem );
 930                         else
 931                                 ret = jQuery.merge( ret, elem );
 932
 933                 });
 934
 935                 if ( fragment ) {
 936                         for ( var i = 0; ret[i]; i++ ) {
 937                                 if ( jQuery.nodeName( ret[i], "script" ) && (!ret[i].type || ret[i].type.toLowerCase() === "text/javascript") ) {
 938                                         scripts.push( ret[i].parentNode ? ret[i].parentNode.removeChild( ret[i] ) : ret[i] );
 939                                 } else {
 940                                         if ( ret[i].nodeType === 1 )
 941                                                 ret.splice.apply( ret, [i + 1, 0].concat(jQuery.makeArray(ret[i].getElementsByTagName("script"))) );
 942                                         fragment.appendChild( ret[i] );
 943                                 }
 944                         }
 945
 946                         return scripts;
 947                 }
 948
 949                 return ret;
 950         },
 951
 952         attr: function( elem, name, value ) {
 953                 // don't set attributes on text and comment nodes
 954                 if (!elem || elem.nodeType == 3 || elem.nodeType == 8)
 955                         return undefined;
 956
 957                 var notxml = !jQuery.isXMLDoc( elem ),
 958                         // Whether we are setting (or getting)
 959                         set = value !== undefined;
 960
 961                 // Try to normalize/fix the name
 962                 name = notxml && jQuery.props[ name ] || name;
 963
 964                 // Only do all the following if this is a node (faster for style)
 965                 // IE elem.getAttribute passes even for style
 966                 if ( elem.tagName ) {
 967
 968                         // These attributes require special treatment
 969                         var special = /href|src|style/.test( name );
 970
 971                         // Safari mis-reports the default selected property of a hidden option
 972                         // Accessing the parent's selectedIndex property fixes it
 973                         if ( name == "selected" && elem.parentNode )
 974                                 elem.parentNode.selectedIndex;
 975
 976                         // If applicable, access the attribute via the DOM 0 way
 977                         if ( name in elem && notxml && !special ) {
 978                                 if ( set ){
 979                                         // We can't allow the type property to be changed (since it causes problems in IE)
 980                                         if ( name == "type" && jQuery.nodeName( elem, "input" ) && elem.parentNode )
 981                                                 throw "type property can't be changed";
 982
 983                                         elem[ name ] = value;
 984                                 }
 985
 986                                 // browsers index elements by id/name on forms, give priority to attributes.
 987                                 if( jQuery.nodeName( elem, "form" ) && elem.getAttributeNode(name) )
 988                                         return elem.getAttributeNode( name ).nodeValue;
 989
 990                                 // elem.tabIndex doesn't always return the correct value when it hasn't been explicitly set
 991                                 // http://fluidproject.org/blog/2008/01/09/getting-setting-and-removing-tabindex-values-with-javascript/
 992                                 if ( name == "tabIndex" ) {
 993                                         var attributeNode = elem.getAttributeNode( "tabIndex" );
 994                                         return attributeNode && attributeNode.specified
 995                                                 ? attributeNode.value
 996                                                 : elem.nodeName.match(/(button|input|object|select|textarea)/i)
 997                                                         ? 0
 998                                                         : elem.nodeName.match(/^(a|area)$/i) && elem.href
 999                                                                 ? 0
1000                                                                 : undefined;
1001                                 }
1002
1003                                 return elem[ name ];
1004                         }
1005
1006                         if ( !jQuery.support.style && notxml &&  name == "style" )
1007                                 return jQuery.attr( elem.style, "cssText", value );
1008
1009                         if ( set )
1010                                 // convert the value to a string (all browsers do this but IE) see #1070
1011                                 elem.setAttribute( name, "" + value );
1012
1013                         var attr = !jQuery.support.hrefNormalized && notxml && special
1014                                         // Some attributes require a special call on IE
1015                                         ? elem.getAttribute( name, 2 )
1016                                         : elem.getAttribute( name );
1017
1018                         // Non-existent attributes return null, we normalize to undefined
1019                         return attr === null ? undefined : attr;
1020                 }
1021
1022                 // elem is actually elem.style ... set the style
1023
1024                 // IE uses filters for opacity
1025                 if ( !jQuery.support.opacity && name == "opacity" ) {
1026                         if ( set ) {
1027                                 // IE has trouble with opacity if it does not have layout
1028                                 // Force it by setting the zoom level
1029                                 elem.zoom = 1;
1030
1031                                 // Set the alpha filter to set the opacity
1032                                 elem.filter = (elem.filter || "").replace( /alpha\([^)]*\)/, "" ) +
1033                                         (parseInt( value ) + '' == "NaN" ? "" : "alpha(opacity=" + value * 100 + ")");
1034                         }
1035
1036                         return elem.filter && elem.filter.indexOf("opacity=") >= 0 ?
1037                                 (parseFloat( elem.filter.match(/opacity=([^)]*)/)[1] ) / 100) + '':
1038                                 "";
1039                 }
1040
1041                 name = name.replace(/-([a-z])/ig, function(all, letter){
1042                         return letter.toUpperCase();
1043                 });
1044
1045                 if ( set )
1046                         elem[ name ] = value;
1047
1048                 return elem[ name ];
1049         },
1050
1051         trim: function( text ) {
1052                 return (text || "").replace( /^\s+|\s+$/g, "" );
1053         },
1054
1055         makeArray: function( array ) {
1056                 var ret = [];
1057
1058                 if( array != null ){
1059                         var i = array.length;
1060                         // The window, strings (and functions) also have 'length'
1061                         if( i == null || typeof array === "string" || jQuery.isFunction(array) || array.setInterval )
1062                                 ret[0] = array;
1063                         else
1064                                 while( i )
1065                                         ret[--i] = array[i];
1066                 }
1067
1068                 return ret;
1069         },
1070
1071         inArray: function( elem, array ) {
1072                 for ( var i = 0, length = array.length; i < length; i++ )
1073                 // Use === because on IE, window == document
1074                         if ( array[ i ] === elem )
1075                                 return i;
1076
1077                 return -1;
1078         },
1079
1080         merge: function( first, second ) {
1081                 // We have to loop this way because IE & Opera overwrite the length
1082                 // expando of getElementsByTagName
1083                 var i = 0, elem, pos = first.length;
1084                 // Also, we need to make sure that the correct elements are being returned
1085                 // (IE returns comment nodes in a '*' query)
1086                 if ( !jQuery.support.getAll ) {
1087                         while ( (elem = second[ i++ ]) != null )
1088                                 if ( elem.nodeType != 8 )
1089                                         first[ pos++ ] = elem;
1090
1091                 } else
1092                         while ( (elem = second[ i++ ]) != null )
1093                                 first[ pos++ ] = elem;
1094
1095                 return first;
1096         },
1097
1098         unique: function( array ) {
1099                 var ret = [], done = {};
1100
1101                 try {
1102
1103                         for ( var i = 0, length = array.length; i < length; i++ ) {
1104                                 var id = jQuery.data( array[ i ] );
1105
1106                                 if ( !done[ id ] ) {
1107                                         done[ id ] = true;
1108                                         ret.push( array[ i ] );
1109                                 }
1110                         }
1111
1112                 } catch( e ) {
1113                         ret = array;
1114                 }
1115
1116                 return ret;
1117         },
1118
1119         grep: function( elems, callback, inv ) {
1120                 var ret = [];
1121
1122                 // Go through the array, only saving the items
1123                 // that pass the validator function
1124                 for ( var i = 0, length = elems.length; i < length; i++ )
1125                         if ( !inv != !callback( elems[ i ], i ) )
1126                                 ret.push( elems[ i ] );
1127
1128                 return ret;
1129         },
1130
1131         map: function( elems, callback ) {
1132                 var ret = [];
1133
1134                 // Go through the array, translating each of the items to their
1135                 // new value (or values).
1136                 for ( var i = 0, length = elems.length; i < length; i++ ) {
1137                         var value = callback( elems[ i ], i );
1138
1139                         if ( value != null )
1140                                 ret[ ret.length ] = value;
1141                 }
1142
1143                 return ret.concat.apply( [], ret );
1144         }
1145 });
1146
1147 // Use of jQuery.browser is deprecated.
1148 // It's included for backwards compatibility and plugins,
1149 // although they should work to migrate away.
1150
1151 var userAgent = navigator.userAgent.toLowerCase();
1152
1153 // Figure out what browser is being used
1154 jQuery.browser = {
1155         version: (userAgent.match( /.+(?:rv|it|ra|ie)[\/: ]([\d.]+)/ ) || [0,'0'])[1],
1156         safari: /webkit/.test( userAgent ),
1157         opera: /opera/.test( userAgent ),
1158         msie: /msie/.test( userAgent ) && !/opera/.test( userAgent ),
1159         mozilla: /mozilla/.test( userAgent ) && !/(compatible|webkit)/.test( userAgent )
1160 };
1161
1162 jQuery.each({
1163         parent: function(elem){return elem.parentNode;},
1164         parents: function(elem){return jQuery.dir(elem,"parentNode");},
1165         next: function(elem){return jQuery.nth(elem,2,"nextSibling");},
1166         prev: function(elem){return jQuery.nth(elem,2,"previousSibling");},
1167         nextAll: function(elem){return jQuery.dir(elem,"nextSibling");},
1168         prevAll: function(elem){return jQuery.dir(elem,"previousSibling");},
1169         siblings: function(elem){return jQuery.sibling(elem.parentNode.firstChild,elem);},
1170         children: function(elem){return jQuery.sibling(elem.firstChild);},
1171         contents: function(elem){return jQuery.nodeName(elem,"iframe")?elem.contentDocument||elem.contentWindow.document:jQuery.makeArray(elem.childNodes);}
1172 }, function(name, fn){
1173         jQuery.fn[ name ] = function( selector ) {
1174                 var ret = jQuery.map( this, fn );
1175
1176                 if ( selector && typeof selector == "string" )
1177                         ret = jQuery.multiFilter( selector, ret );
1178
1179                 return this.pushStack( jQuery.unique( ret ), name, selector );
1180         };
1181 });
1182
1183 jQuery.each({
1184         appendTo: "append",
1185         prependTo: "prepend",
1186         insertBefore: "before",
1187         insertAfter: "after",
1188         replaceAll: "replaceWith"
1189 }, function(name, original){
1190         jQuery.fn[ name ] = function() {
1191                 var args = arguments;
1192
1193                 return this.each(function(){
1194                         for ( var i = 0, length = args.length; i < length; i++ )
1195                                 jQuery( args[ i ] )[ original ]( this );
1196                 });
1197         };
1198 });
1199
1200 jQuery.each({
1201         removeAttr: function( name ) {
1202                 jQuery.attr( this, name, "" );
1203                 if (this.nodeType == 1)
1204                         this.removeAttribute( name );
1205         },
1206
1207         addClass: function( classNames ) {
1208                 jQuery.className.add( this, classNames );
1209         },
1210
1211         removeClass: function( classNames ) {
1212                 jQuery.className.remove( this, classNames );
1213         },
1214
1215         toggleClass: function( classNames, state ) {
1216                 if( typeof state !== "boolean" )
1217                         state = !jQuery.className.has( this, classNames );
1218                 jQuery.className[ state ? "add" : "remove" ]( this, classNames );
1219         },
1220
1221         remove: function( selector ) {
1222                 if ( !selector || jQuery.filter( selector, [ this ] ).length ) {
1223                         // Prevent memory leaks
1224                         jQuery( "*", this ).add([this]).each(function(){
1225                                 jQuery.event.remove(this);
1226                                 jQuery.removeData(this);
1227                         });
1228                         if (this.parentNode)
1229                                 this.parentNode.removeChild( this );
1230                 }
1231         },
1232
1233         empty: function() {
1234                 // Remove element nodes and prevent memory leaks
1235                 jQuery( ">*", this ).remove();
1236
1237                 // Remove any remaining nodes
1238                 while ( this.firstChild )
1239                         this.removeChild( this.firstChild );
1240         }
1241 }, function(name, fn){
1242         jQuery.fn[ name ] = function(){
1243                 return this.each( fn, arguments );
1244         };
1245 });
1246
1247 // Helper function used by the dimensions and offset modules
1248 function num(elem, prop) {
1249         return elem[0] && parseInt( jQuery.curCSS(elem[0], prop, true), 10 ) || 0;
1250 }