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