src/core.js

   1 /*
   2  * jQuery @VERSION - New Wave Javascript
   3  *
   4  * Copyright (c) 2008 John Resig (jquery.com)
   5  * Dual licensed under the MIT (MIT-LICENSE.txt)
   6  * and GPL (GPL-LICENSE.txt) licenses.
   7  *
   8  * $Date$
   9  * $Rev$
  10  */
  11
  12 // Map over jQuery in case of overwrite
  13 var _jQuery = window.jQuery,
  14 // Map over the $ in case of overwrite
  15         _$ = window.$;
  16
  17 var jQuery = window.jQuery = window.$ = function( selector, context ) {
  18         // The jQuery object is actually just the init constructor 'enhanced'
  19         return new jQuery.fn.init( selector, context );
  20 };
  21
  22 // A simple way to check for HTML strings or ID strings
  23 // (both of which we optimize for)
  24 var quickExpr = /^[^<]*(<(.|\s)+>)[^>]*$|^#(\w+)$/,
  25
  26 // Is it a simple selector
  27         isSimple = /^.[^:#\[\.]*$/,
  28
  29 // Will speed up references to undefined, and allows munging its name.
  30         undefined;
  31
  32 jQuery.fn = jQuery.prototype = {
  33         init: function( selector, context ) {
  34                 // Make sure that a selection was provided
  35                 selector = selector || document;
  36
  37                 // Handle $(DOMElement)
  38                 if ( selector.nodeType ) {
  39                         this[0] = selector;
  40                         this.length = 1;
  41                         return this;
  42                 }
  43                 // Handle HTML strings
  44                 if ( typeof selector == "string" ) {
  45                         // Are we dealing with HTML string or an ID?
  46                         var match = quickExpr.exec( selector );
  47
  48                         // Verify a match, and that no context was specified for #id
  49                         if ( match && (match[1] || !context) ) {
  50
  51                                 // HANDLE: $(html) -> $(array)
  52                                 if ( match[1] )
  53                                         selector = jQuery.clean( [ match[1] ], context );
  54
  55                                 // HANDLE: $("#id")
  56                                 else {
  57                                         var elem = document.getElementById( match[3] );
  58
  59                                         // Make sure an element was located
  60                                         if ( elem ){
  61                                                 // Handle the case where IE and Opera return items
  62                                                 // by name instead of ID
  63                                                 if ( elem.id != match[3] )
  64                                                         return jQuery().find( selector );
  65
  66                                                 // Otherwise, we inject the element directly into the jQuery object
  67                                                 return jQuery( elem );
  68                                         }
  69                                         selector = [];
  70                                 }
  71
  72                         // HANDLE: $(expr, [context])
  73                         // (which is just equivalent to: $(content).find(expr)
  74                         } else
  75                                 return jQuery( context ).find( selector );
  76
  77                 // HANDLE: $(function)
  78                 // Shortcut for document ready
  79                 } else if ( jQuery.isFunction( selector ) )
  80                         return jQuery( document )[ jQuery.fn.ready ? "ready" : "load" ]( selector );
  81
  82                 return this.setArray(jQuery.makeArray(selector));
  83         },
  84
  85         // The current version of jQuery being used
  86         jquery: "@VERSION",
  87
  88         // The number of elements contained in the matched element set
  89         size: function() {
  90                 return this.length;
  91         },
  92
  93         // The number of elements contained in the matched element set
  94         length: 0,
  95
  96         // Get the Nth element in the matched element set OR
  97         // Get the whole matched element set as a clean array
  98         get: function( num ) {
  99                 return num == undefined ?
 100
 101                         // Return a 'clean' array
 102                         jQuery.makeArray( this ) :
 103
 104                         // Return just the object
 105                         this[ num ];
 106         },
 107
 108         // Take an array of elements and push it onto the stack
 109         // (returning the new matched element set)
 110         pushStack: function( elems ) {
 111                 // Build a new jQuery matched element set
 112                 var ret = jQuery( elems );
 113
 114                 // Add the old object onto the stack (as a reference)
 115                 ret.prevObject = this;
 116
 117                 // Return the newly-formed element set
 118                 return ret;
 119         },
 120
 121         // Force the current matched set of elements to become
 122         // the specified array of elements (destroying the stack in the process)
 123         // You should use pushStack() in order to do this, but maintain the stack
 124         setArray: function( elems ) {
 125                 // Resetting the length to 0, then using the native Array push
 126                 // is a super-fast way to populate an object with array-like properties
 127                 this.length = 0;
 128                 Array.prototype.push.apply( this, elems );
 129
 130                 return this;
 131         },
 132
 133         // Execute a callback for every element in the matched set.
 134         // (You can seed the arguments with an array of args, but this is
 135         // only used internally.)
 136         each: function( callback, args ) {
 137                 return jQuery.each( this, callback, args );
 138         },
 139
 140         // Determine the position of an element within
 141         // the matched set of elements
 142         index: function( elem ) {
 143                 var ret = -1;
 144
 145                 // Locate the position of the desired element
 146                 return jQuery.inArray(
 147                         // If it receives a jQuery object, the first element is used
 148                         elem && elem.jquery ? elem[0] : elem
 149                 , this );
 150         },
 151
 152         attr: function( name, value, type ) {
 153                 var options = name;
 154
 155                 // Look for the case where we're accessing a style value
 156                 if ( name.constructor == String )
 157                         if ( value === undefined )
 158                                 return this[0] && jQuery[ type || "attr" ]( this[0], name );
 159
 160                         else {
 161                                 options = {};
 162                                 options[ name ] = value;
 163                         }
 164
 165                 // Check to see if we're setting style values
 166                 return this.each(function(i){
 167                         // Set all the styles
 168                         for ( name in options )
 169                                 jQuery.attr(
 170                                         type ?
 171                                                 this.style :
 172                                                 this,
 173                                         name, jQuery.prop( this, options[ name ], type, i, name )
 174                                 );
 175                 });
 176         },
 177
 178         css: function( key, value ) {
 179                 // ignore negative width and height values
 180                 if ( (key == 'width' || key == 'height') && parseFloat(value) < 0 )
 181                         value = undefined;
 182                 return this.attr( key, value, "curCSS" );
 183         },
 184
 185         text: function( text ) {
 186                 if ( typeof text != "object" && text != null )
 187                         return this.empty().append( (this[0] && this[0].ownerDocument || document).createTextNode( text ) );
 188
 189                 var ret = "";
 190
 191                 jQuery.each( text || this, function(){
 192                         jQuery.each( this.childNodes, function(){
 193                                 if ( this.nodeType != 8 )
 194                                         ret += this.nodeType != 1 ?
 195                                                 this.nodeValue :
 196                                                 jQuery.fn.text( [ this ] );
 197                         });
 198                 });
 199
 200                 return ret;
 201         },
 202
 203         wrapAll: function( html ) {
 204                 if ( this[0] )
 205                         // The elements to wrap the target around
 206                         jQuery( html, this[0].ownerDocument )
 207                                 .clone()
 208                                 .insertBefore( this[0] )
 209                                 .map(function(){
 210                                         var elem = this;
 211
 212                                         while ( elem.firstChild )
 213                                                 elem = elem.firstChild;
 214
 215                                         return elem;
 216                                 })
 217                                 .append(this);
 218
 219                 return this;
 220         },
 221
 222         wrapInner: function( html ) {
 223                 return this.each(function(){
 224                         jQuery( this ).contents().wrapAll( html );
 225                 });
 226         },
 227
 228         wrap: function( html ) {
 229                 return this.each(function(){
 230                         jQuery( this ).wrapAll( html );
 231                 });
 232         },
 233
 234         append: function() {
 235                 return this.domManip(arguments, true, false, function(elem){
 236                         if (this.nodeType == 1)
 237                                 this.appendChild( elem );
 238                 });
 239         },
 240
 241         prepend: function() {
 242                 return this.domManip(arguments, true, true, function(elem){
 243                         if (this.nodeType == 1)
 244                                 this.insertBefore( elem, this.firstChild );
 245                 });
 246         },
 247
 248         before: function() {
 249                 return this.domManip(arguments, false, false, function(elem){
 250                         this.parentNode.insertBefore( elem, this );
 251                 });
 252         },
 253
 254         after: function() {
 255                 return this.domManip(arguments, false, true, function(elem){
 256                         this.parentNode.insertBefore( elem, this.nextSibling );
 257                 });
 258         },
 259
 260         end: function() {
 261                 return this.prevObject || jQuery( [] );
 262         },
 263
 264         find: function( selector ) {
 265                 var elems = jQuery.map(this, function(elem){
 266                         return jQuery.find( selector, elem );
 267                 });
 268
 269                 return this.pushStack( /[^+>] [^+>]/.test( selector ) || selector.indexOf("..") > -1 ?
 270                         jQuery.unique( elems ) :
 271                         elems );
 272         },
 273
 274         clone: function( events ) {
 275                 // Do the clone
 276                 var ret = this.map(function(){
 277                         if ( jQuery.browser.msie && !jQuery.isXMLDoc(this) ) {
 278                                 // IE copies events bound via attachEvent when
 279                                 // using cloneNode. Calling detachEvent on the
 280                                 // clone will also remove the events from the orignal
 281                                 // In order to get around this, we use innerHTML.
 282                                 // Unfortunately, this means some modifications to
 283                                 // attributes in IE that are actually only stored
 284                                 // as properties will not be copied (such as the
 285                                 // the name attribute on an input).
 286                                 var clone = this.cloneNode(true),
 287                                         container = document.createElement("div");
 288                                 container.appendChild(clone);
 289                                 return jQuery.clean([container.innerHTML])[0];
 290                         } else
 291                                 return this.cloneNode(true);
 292                 });
 293
 294                 // Need to set the expando to null on the cloned set if it exists
 295                 // removeData doesn't work here, IE removes it from the original as well
 296                 // this is primarily for IE but the data expando shouldn't be copied over in any browser
 297                 var clone = ret.find("*").andSelf().each(function(){
 298                         if ( this[ expando ] != undefined )
 299                                 this[ expando ] = null;
 300                 });
 301
 302                 // Copy the events from the original to the clone
 303                 if ( events === true )
 304                         this.find("*").andSelf().each(function(i){
 305                                 if (this.nodeType == 3)
 306                                         return;
 307                                 var events = jQuery.data( this, "events" );
 308
 309                                 for ( var type in events )
 310                                         for ( var handler in events[ type ] )
 311                                                 jQuery.event.add( clone[ i ], type, events[ type ][ handler ], events[ type ][ handler ].data );
 312                         });
 313
 314                 // Return the cloned set
 315                 return ret;
 316         },
 317
 318         filter: function( selector ) {
 319                 return this.pushStack(
 320                         jQuery.isFunction( selector ) &&
 321                         jQuery.grep(this, function(elem, i){
 322                                 return selector.call( elem, i );
 323                         }) ||
 324
 325                         jQuery.multiFilter( selector, this ) );
 326         },
 327
 328         not: function( selector ) {
 329                 if ( selector.constructor == String )
 330                         // test special case where just one selector is passed in
 331                         if ( isSimple.test( selector ) )
 332                                 return this.pushStack( jQuery.multiFilter( selector, this, true ) );
 333                         else
 334                                 selector = jQuery.multiFilter( selector, this );
 335
 336                 var isArrayLike = selector.length && selector[selector.length - 1] !== undefined && !selector.nodeType;
 337                 return this.filter(function() {
 338                         return isArrayLike ? jQuery.inArray( this, selector ) < 0 : this != selector;
 339                 });
 340         },
 341
 342         add: function( selector ) {
 343                 return this.pushStack( jQuery.unique( jQuery.merge(
 344                         this.get(),
 345                         typeof selector == 'string' ?
 346                                 jQuery( selector ) :
 347                                 jQuery.makeArray( selector )
 348                 )));
 349         },
 350
 351         is: function( selector ) {
 352                 return !!selector && jQuery.multiFilter( selector, this ).length > 0;
 353         },
 354
 355         hasClass: function( selector ) {
 356                 return this.is( "." + selector );
 357         },
 358
 359         val: function( value ) {
 360                 if ( value == undefined ) {
 361
 362                         if ( this.length ) {
 363                                 var elem = this[0];
 364
 365                                 // We need to handle select boxes special
 366                                 if ( jQuery.nodeName( elem, "select" ) ) {
 367                                         var index = elem.selectedIndex,
 368                                                 values = [],
 369                                                 options = elem.options,
 370                                                 one = elem.type == "select-one";
 371
 372                                         // Nothing was selected
 373                                         if ( index < 0 )
 374                                                 return null;
 375
 376                                         // Loop through all the selected options
 377                                         for ( var i = one ? index : 0, max = one ? index + 1 : options.length; i < max; i++ ) {
 378                                                 var option = options[ i ];
 379
 380                                                 if ( option.selected ) {
 381                                                         // Get the specifc value for the option
 382                                                         value = jQuery.browser.msie && !option.attributes.value.specified ? option.text : option.value;
 383
 384                                                         // We don't need an array for one selects
 385                                                         if ( one )
 386                                                                 return value;
 387
 388                                                         // Multi-Selects return an array
 389                                                         values.push( value );
 390                                                 }
 391                                         }
 392
 393                                         return values;
 394
 395                                 // Everything else, we just grab the value
 396                                 } else
 397                                         return (this[0].value || "").replace(/\r/g, "");
 398
 399                         }
 400
 401                         return undefined;
 402                 }
 403
 404                 return this.each(function(){
 405                         if ( this.nodeType != 1 )
 406                                 return;
 407
 408                         if ( value.constructor == Array && /radio|checkbox/.test( this.type ) )
 409                                 this.checked = (jQuery.inArray(this.value, value) >= 0 ||
 410                                         jQuery.inArray(this.name, value) >= 0);
 411
 412                         else if ( jQuery.nodeName( this, "select" ) ) {
 413                                 var values = jQuery.makeArray(value);
 414
 415                                 jQuery( "option", this ).each(function(){
 416                                         this.selected = (jQuery.inArray( this.value, values ) >= 0 ||
 417                                                 jQuery.inArray( this.text, values ) >= 0);
 418                                 });
 419
 420                                 if ( !values.length )
 421                                         this.selectedIndex = -1;
 422
 423                         } else
 424                                 this.value = value;
 425                 });
 426         },
 427
 428         html: function( value ) {
 429                 return value == undefined ?
 430                         (this.length ?
 431                                 this[0].innerHTML :
 432                                 null) :
 433                         this.empty().append( value );
 434         },
 435
 436         replaceWith: function( value ) {
 437                 return this.after( value ).remove();
 438         },
 439
 440         eq: function( i ) {
 441                 return this.slice( i, i + 1 );
 442         },
 443
 444         slice: function() {
 445                 return this.pushStack( Array.prototype.slice.apply( this, arguments ) );
 446         },
 447
 448         map: function( callback ) {
 449                 return this.pushStack( jQuery.map(this, function(elem, i){
 450                         return callback.call( elem, i, elem );
 451                 }));
 452         },
 453
 454         andSelf: function() {
 455                 return this.add( this.prevObject );
 456         },
 457
 458         data: function( key, value ){
 459                 var parts = key.split(".");
 460                 parts[1] = parts[1] ? "." + parts[1] : "";
 461
 462                 if ( value === undefined ) {
 463                         var data = this.triggerHandler("getData" + parts[1] + "!", [parts[0]]);
 464
 465                         if ( data === undefined && this.length )
 466                                 data = jQuery.data( this[0], key );
 467
 468                         return data === undefined && parts[1] ?
 469                                 this.data( parts[0] ) :
 470                                 data;
 471                 } else
 472                         return this.trigger("setData" + parts[1] + "!", [parts[0], value]).each(function(){
 473                                 jQuery.data( this, key, value );
 474                         });
 475         },
 476
 477         removeData: function( key ){
 478                 return this.each(function(){
 479                         jQuery.removeData( this, key );
 480                 });
 481         },
 482
 483         domManip: function( args, table, reverse, callback ) {
 484                 var clone = this.length > 1, elems;
 485
 486                 return this.each(function(){
 487                         if ( !elems ) {
 488                                 elems = jQuery.clean( args, this.ownerDocument );
 489
 490                                 if ( reverse )
 491                                         elems.reverse();
 492                         }
 493
 494                         var obj = this;
 495
 496                         if ( table && jQuery.nodeName( this, "table" ) && jQuery.nodeName( elems[0], "tr" ) )
 497                                 obj = this.getElementsByTagName("tbody")[0] || this.appendChild( this.ownerDocument.createElement("tbody") );
 498
 499                         var scripts = jQuery( [] );
 500
 501                         jQuery.each(elems, function(){
 502                                 var elem = clone ?
 503                                         jQuery( this ).clone( true )[0] :
 504                                         this;
 505
 506                                 // execute all scripts after the elements have been injected
 507                                 if ( jQuery.nodeName( elem, "script" ) ) {
 508                                         scripts = scripts.add( elem );
 509                                 } else {
 510                                         // Remove any inner scripts for later evaluation
 511                                         if ( elem.nodeType == 1 )
 512                                                 scripts = scripts.add( jQuery( "script", elem ).remove() );
 513
 514                                         // Inject the elements into the document
 515                                         callback.call( obj, elem );
 516                                 }
 517                         });
 518
 519                         scripts.each( evalScript );
 520                 });
 521         }
 522 };
 523
 524 // Give the init function the jQuery prototype for later instantiation
 525 jQuery.fn.init.prototype = jQuery.fn;
 526
 527 function evalScript( i, elem ) {
 528         if ( elem.src )
 529                 jQuery.ajax({
 530                         url: elem.src,
 531                         async: false,
 532                         dataType: "script"
 533                 });
 534
 535         else
 536                 jQuery.globalEval( elem.text || elem.textContent || elem.innerHTML || "" );
 537
 538         if ( elem.parentNode )
 539                 elem.parentNode.removeChild( elem );
 540 }
 541
 542 function now(){
 543         return +new Date;
 544 }
 545
 546 jQuery.extend = jQuery.fn.extend = function() {
 547         // copy reference to target object
 548         var target = arguments[0] || {}, i = 1, length = arguments.length, deep = false, options;
 549
 550         // Handle a deep copy situation
 551         if ( target.constructor == Boolean ) {
 552                 deep = target;
 553                 target = arguments[1] || {};
 554                 // skip the boolean and the target
 555                 i = 2;
 556         }
 557
 558         // Handle case when target is a string or something (possible in deep copy)
 559         if ( typeof target != "object" && typeof target != "function" )
 560                 target = {};
 561
 562         // extend jQuery itself if only one argument is passed
 563         if ( length == i ) {
 564                 target = this;
 565                 --i;
 566         }
 567
 568         for ( ; i < length; i++ )
 569                 // Only deal with non-null/undefined values
 570                 if ( (options = arguments[ i ]) != null )
 571                         // Extend the base object
 572                         for ( var name in options ) {
 573                                 var src = target[ name ], copy = options[ name ];
 574
 575                                 // Prevent never-ending loop
 576                                 if ( target === copy )
 577                                         continue;
 578
 579                                 // Recurse if we're merging object values
 580                                 if ( deep && copy && typeof copy == "object" && !copy.nodeType )
 581                                         target[ name ] = jQuery.extend( deep,
 582                                                 // Never move original objects, clone them
 583                                                 src || ( copy.length != null ? [ ] : { } )
 584                                         , copy );
 585
 586                                 // Don't bring in undefined values
 587                                 else if ( copy !== undefined )
 588                                         target[ name ] = copy;
 589
 590                         }
 591
 592         // Return the modified object
 593         return target;
 594 };
 595
 596 var expando = "jQuery" + now(), uuid = 0, windowData = {},
 597         // exclude the following css properties to add px
 598         exclude = /z-?index|font-?weight|opacity|zoom|line-?height/i,
 599         // cache defaultView
 600         defaultView = document.defaultView || {};
 601
 602 jQuery.extend({
 603         noConflict: function( deep ) {
 604                 window.$ = _$;
 605
 606                 if ( deep )
 607                         window.jQuery = _jQuery;
 608
 609                 return jQuery;
 610         },
 611
 612         // See test/unit/core.js for details concerning this function.
 613         isFunction: function( fn ) {
 614                 return !!fn && typeof fn != "string" && !fn.nodeName &&
 615                         fn.constructor != Array && /^[\s[]?function/.test( fn + "" );
 616         },
 617
 618         // check if an element is in a (or is an) XML document
 619         isXMLDoc: function( elem ) {
 620                 return elem.documentElement && !elem.body ||
 621                         elem.tagName && elem.ownerDocument && !elem.ownerDocument.body;
 622         },
 623
 624         // Evalulates a script in a global context
 625         globalEval: function( data ) {
 626                 data = jQuery.trim( data );
 627
 628                 if ( data ) {
 629                         // Inspired by code by Andrea Giammarchi
 630                         // http://webreflection.blogspot.com/2007/08/global-scope-evaluation-and-dom.html
 631                         var head = document.getElementsByTagName("head")[0] || document.documentElement,
 632                                 script = document.createElement("script");
 633
 634                         script.type = "text/javascript";
 635                         if ( jQuery.browser.msie )
 636                                 script.text = data;
 637                         else
 638                                 script.appendChild( document.createTextNode( data ) );
 639
 640                         // Use insertBefore instead of appendChild  to circumvent an IE6 bug.
 641                         // This arises when a base node is used (#2709).
 642                         head.insertBefore( script, head.firstChild );
 643                         head.removeChild( script );
 644                 }
 645         },
 646
 647         nodeName: function( elem, name ) {
 648                 return elem.nodeName && elem.nodeName.toUpperCase() == name.toUpperCase();
 649         },
 650
 651         cache: {},
 652
 653         data: function( elem, name, data ) {
 654                 elem = elem == window ?
 655                         windowData :
 656                         elem;
 657
 658                 var id = elem[ expando ];
 659
 660                 // Compute a unique ID for the element
 661                 if ( !id )
 662                         id = elem[ expando ] = ++uuid;
 663
 664                 // Only generate the data cache if we're
 665                 // trying to access or manipulate it
 666                 if ( name && !jQuery.cache[ id ] )
 667                         jQuery.cache[ id ] = {};
 668
 669                 // Prevent overriding the named cache with undefined values
 670                 if ( data !== undefined )
 671                         jQuery.cache[ id ][ name ] = data;
 672
 673                 // Return the named cache data, or the ID for the element
 674                 return name ?
 675                         jQuery.cache[ id ][ name ] :
 676                         id;
 677         },
 678
 679         removeData: function( elem, name ) {
 680                 elem = elem == window ?
 681                         windowData :
 682                         elem;
 683
 684                 var id = elem[ expando ];
 685
 686                 // If we want to remove a specific section of the element's data
 687                 if ( name ) {
 688                         if ( jQuery.cache[ id ] ) {
 689                                 // Remove the section of cache data
 690                                 delete jQuery.cache[ id ][ name ];
 691
 692                                 // If we've removed all the data, remove the element's cache
 693                                 name = "";
 694
 695                                 for ( name in jQuery.cache[ id ] )
 696                                         break;
 697
 698                                 if ( !name )
 699                                         jQuery.removeData( elem );
 700                         }
 701
 702                 // Otherwise, we want to remove all of the element's data
 703                 } else {
 704                         // Clean up the element expando
 705                         try {
 706                                 delete elem[ expando ];
 707                         } catch(e){
 708                                 // IE has trouble directly removing the expando
 709                                 // but it's ok with using removeAttribute
 710                                 if ( elem.removeAttribute )
 711                                         elem.removeAttribute( expando );
 712                         }
 713
 714                         // Completely remove the data cache
 715                         delete jQuery.cache[ id ];
 716                 }
 717         },
 718
 719         // args is for internal usage only
 720         each: function( object, callback, args ) {
 721                 var name, i = 0, length = object.length;
 722
 723                 if ( args ) {
 724                         if ( length == undefined ) {
 725                                 for ( name in object )
 726                                         if ( callback.apply( object[ name ], args ) === false )
 727                                                 break;
 728                         } else
 729                                 for ( ; i < length; )
 730                                         if ( callback.apply( object[ i++ ], args ) === false )
 731                                                 break;
 732
 733                 // A special, fast, case for the most common use of each
 734                 } else {
 735                         if ( length == undefined ) {
 736                                 for ( name in object )
 737                                         if ( callback.call( object[ name ], name, object[ name ] ) === false )
 738                                                 break;
 739                         } else
 740                                 for ( var value = object[0];
 741                                         i < length && callback.call( value, i, value ) !== false; value = object[++i] ){}
 742                 }
 743
 744                 return object;
 745         },
 746
 747         prop: function( elem, value, type, i, name ) {
 748                         // Handle executable functions
 749                         if ( jQuery.isFunction( value ) )
 750                                 value = value.call( elem, i );
 751
 752                         // Handle passing in a number to a CSS property
 753                         return value && value.constructor == Number && type == "curCSS" && !exclude.test( name ) ?
 754                                 value + "px" :
 755                                 value;
 756         },
 757
 758         className: {
 759                 // internal only, use addClass("class")
 760                 add: function( elem, classNames ) {
 761                         jQuery.each((classNames || "").split(/\s+/), function(i, className){
 762                                 if ( elem.nodeType == 1 && !jQuery.className.has( elem.className, className ) )
 763                                         elem.className += (elem.className ? " " : "") + className;
 764                         });
 765                 },
 766
 767                 // internal only, use removeClass("class")
 768                 remove: function( elem, classNames ) {
 769                         if (elem.nodeType == 1)
 770                                 elem.className = classNames != undefined ?
 771                                         jQuery.grep(elem.className.split(/\s+/), function(className){
 772                                                 return !jQuery.className.has( classNames, className );
 773                                         }).join(" ") :
 774                                         "";
 775                 },
 776
 777                 // internal only, use hasClass("class")
 778                 has: function( elem, className ) {
 779                         return jQuery.inArray( className, (elem.className || elem).toString().split(/\s+/) ) > -1;
 780                 }
 781         },
 782
 783         // A method for quickly swapping in/out CSS properties to get correct calculations
 784         swap: function( elem, options, callback ) {
 785                 var old = {};
 786                 // Remember the old values, and insert the new ones
 787                 for ( var name in options ) {
 788                         old[ name ] = elem.style[ name ];
 789                         elem.style[ name ] = options[ name ];
 790                 }
 791
 792                 callback.call( elem );
 793
 794                 // Revert the old values
 795                 for ( var name in options )
 796                         elem.style[ name ] = old[ name ];
 797         },
 798
 799         css: function( elem, name, force ) {
 800                 if ( name == "width" || name == "height" ) {
 801                         var val, props = { position: "absolute", visibility: "hidden", display:"block" }, which = name == "width" ? [ "Left", "Right" ] : [ "Top", "Bottom" ];
 802
 803                         function getWH() {
 804                                 val = name == "width" ? elem.offsetWidth : elem.offsetHeight;
 805                                 var padding = 0, border = 0;
 806                                 jQuery.each( which, function() {
 807                                         padding += parseFloat(jQuery.curCSS( elem, "padding" + this, true)) || 0;
 808                                         border += parseFloat(jQuery.curCSS( elem, "border" + this + "Width", true)) || 0;
 809                                 });
 810                                 val -= Math.round(padding + border);
 811                         }
 812
 813                         if ( jQuery(elem).is(":visible") )
 814                                 getWH();
 815                         else
 816                                 jQuery.swap( elem, props, getWH );
 817
 818                         return Math.max(0, val);
 819                 }
 820
 821                 return jQuery.curCSS( elem, name, force );
 822         },
 823
 824         curCSS: function( elem, name, force ) {
 825                 var ret, style = elem.style;
 826
 827                 // A helper method for determining if an element's values are broken
 828                 function color( elem ) {
 829                         if ( !jQuery.browser.safari )
 830                                 return false;
 831
 832                         // defaultView is cached
 833                         var ret = defaultView.getComputedStyle( elem, null );
 834                         return !ret || ret.getPropertyValue("color") == "";
 835                 }
 836
 837                 // We need to handle opacity special in IE
 838                 if ( name == "opacity" && jQuery.browser.msie ) {
 839                         ret = jQuery.attr( style, "opacity" );
 840
 841                         return ret == "" ?
 842                                 "1" :
 843                                 ret;
 844                 }
 845                 // Opera sometimes will give the wrong display answer, this fixes it, see #2037
 846                 if ( jQuery.browser.opera && name == "display" ) {
 847                         var save = style.outline;
 848                         style.outline = "0 solid black";
 849                         style.outline = save;
 850                 }
 851
 852                 // Make sure we're using the right name for getting the float value
 853                 if ( name.match( /float/i ) )
 854                         name = styleFloat;
 855
 856                 if ( !force && style && style[ name ] )
 857                         ret = style[ name ];
 858
 859                 else if ( defaultView.getComputedStyle ) {
 860
 861                         // Only "float" is needed here
 862                         if ( name.match( /float/i ) )
 863                                 name = "float";
 864
 865                         name = name.replace( /([A-Z])/g, "-$1" ).toLowerCase();
 866
 867                         var computedStyle = defaultView.getComputedStyle( elem, null );
 868
 869                         if ( computedStyle && !color( elem ) )
 870                                 ret = computedStyle.getPropertyValue( name );
 871
 872                         // If the element isn't reporting its values properly in Safari
 873                         // then some display: none elements are involved
 874                         else {
 875                                 var swap = [], stack = [], a = elem, i = 0;
 876
 877                                 // Locate all of the parent display: none elements
 878                                 for ( ; a && color(a); a = a.parentNode )
 879                                         stack.unshift(a);
 880
 881                                 // Go through and make them visible, but in reverse
 882                                 // (It would be better if we knew the exact display type that they had)
 883                                 for ( ; i < stack.length; i++ )
 884                                         if ( color( stack[ i ] ) ) {
 885                                                 swap[ i ] = stack[ i ].style.display;
 886                                                 stack[ i ].style.display = "block";
 887                                         }
 888
 889                                 // Since we flip the display style, we have to handle that
 890                                 // one special, otherwise get the value
 891                                 ret = name == "display" && swap[ stack.length - 1 ] != null ?
 892                                         "none" :
 893                                         ( computedStyle && computedStyle.getPropertyValue( name ) ) || "";
 894
 895                                 // Finally, revert the display styles back
 896                                 for ( i = 0; i < swap.length; i++ )
 897                                         if ( swap[ i ] != null )
 898                                                 stack[ i ].style.display = swap[ i ];
 899                         }
 900
 901                         // We should always get a number back from opacity
 902                         if ( name == "opacity" && ret == "" )
 903                                 ret = "1";
 904
 905                 } else if ( elem.currentStyle ) {
 906                         var camelCase = name.replace(/\-(\w)/g, function(all, letter){
 907                                 return letter.toUpperCase();
 908                         });
 909
 910                         ret = elem.currentStyle[ name ] || elem.currentStyle[ camelCase ];
 911
 912                         // From the awesome hack by Dean Edwards
 913                         // http://erik.eae.net/archives/2007/07/27/18.54.15/#comment-102291
 914
 915                         // If we're not dealing with a regular pixel number
 916                         // but a number that has a weird ending, we need to convert it to pixels
 917                         if ( !/^\d+(px)?$/i.test( ret ) && /^\d/.test( ret ) ) {
 918                                 // Remember the original values
 919                                 var left = style.left, rsLeft = elem.runtimeStyle.left;
 920
 921                                 // Put in the new values to get a computed value out
 922                                 elem.runtimeStyle.left = elem.currentStyle.left;
 923                                 style.left = ret || 0;
 924                                 ret = style.pixelLeft + "px";
 925
 926                                 // Revert the changed values
 927                                 style.left = left;
 928                                 elem.runtimeStyle.left = rsLeft;
 929                         }
 930                 }
 931
 932                 return ret;
 933         },
 934
 935         clean: function( elems, context ) {
 936                 var ret = [];
 937                 context = context || document;
 938                 // !context.createElement fails in IE with an error but returns typeof 'object'
 939                 if (typeof context.createElement == 'undefined')
 940                         context = context.ownerDocument || context[0] && context[0].ownerDocument || document;
 941
 942                 jQuery.each(elems, function(i, elem){
 943                         if ( !elem )
 944                                 return;
 945
 946                         if ( elem.constructor == Number )
 947                                 elem += '';
 948
 949                         // Convert html string into DOM nodes
 950                         if ( typeof elem == "string" ) {
 951                                 // Fix "XHTML"-style tags in all browsers
 952                                 elem = elem.replace(/(<(\w+)[^>]*?)\/>/g, function(all, front, tag){
 953                                         return tag.match(/^(abbr|br|col|img|input|link|meta|param|hr|area|embed)$/i) ?
 954                                                 all :
 955                                                 front + "></" + tag + ">";
 956                                 });
 957
 958                                 // Trim whitespace, otherwise indexOf won't work as expected
 959                                 var tags = jQuery.trim( elem ).toLowerCase(), div = context.createElement("div");
 960
 961                                 var wrap =
 962                                         // option or optgroup
 963                                         !tags.indexOf("<opt") &&
 964                                         [ 1, "<select multiple='multiple'>", "</select>" ] ||
 965
 966                                         !tags.indexOf("<leg") &&
 967                                         [ 1, "<fieldset>", "</fieldset>" ] ||
 968
 969                                         tags.match(/^<(thead|tbody|tfoot|colg|cap)/) &&
 970                                         [ 1, "<table>", "</table>" ] ||
 971
 972                                         !tags.indexOf("<tr") &&
 973                                         [ 2, "<table><tbody>", "</tbody></table>" ] ||
 974
 975                                         // <thead> matched above
 976                                         (!tags.indexOf("<td") || !tags.indexOf("<th")) &&
 977                                         [ 3, "<table><tbody><tr>", "</tr></tbody></table>" ] ||
 978
 979                                         !tags.indexOf("<col") &&
 980                                         [ 2, "<table><tbody></tbody><colgroup>", "</colgroup></table>" ] ||
 981
 982                                         // IE can't serialize <link> and <script> tags normally
 983                                         jQuery.browser.msie &&
 984                                         [ 1, "div<div>", "</div>" ] ||
 985
 986                                         [ 0, "", "" ];
 987
 988                                 // Go to html and back, then peel off extra wrappers
 989                                 div.innerHTML = wrap[1] + elem + wrap[2];
 990
 991                                 // Move to the right depth
 992                                 while ( wrap[0]-- )
 993                                         div = div.lastChild;
 994
 995                                 // Remove IE's autoinserted <tbody> from table fragments
 996                                 if ( jQuery.browser.msie ) {
 997
 998                                         // String was a <table>, *may* have spurious <tbody>
 999                                         var tbody = !tags.indexOf("<table") && tags.indexOf("<tbody") < 0 ?
1000                                                 div.firstChild && div.firstChild.childNodes :
1001
1002                                                 // String was a bare <thead> or <tfoot>
1003                                                 wrap[1] == "<table>" && tags.indexOf("<tbody") < 0 ?
1004                                                         div.childNodes :
1005                                                         [];
1006
1007                                         for ( var j = tbody.length - 1; j >= 0 ; --j )
1008                                                 if ( jQuery.nodeName( tbody[ j ], "tbody" ) && !tbody[ j ].childNodes.length )
1009                                                         tbody[ j ].parentNode.removeChild( tbody[ j ] );
1010
1011                                         // IE completely kills leading whitespace when innerHTML is used
1012                                         if ( /^\s/.test( elem ) )
1013                                                 div.insertBefore( context.createTextNode( elem.match(/^\s*/)[0] ), div.firstChild );
1014
1015                                 }
1016
1017                                 elem = jQuery.makeArray( div.childNodes );
1018                         }
1019
1020                         if ( elem.length === 0 && (!jQuery.nodeName( elem, "form" ) && !jQuery.nodeName( elem, "select" )) )
1021                                 return;
1022
1023                         if ( elem[0] == undefined || jQuery.nodeName( elem, "form" ) || elem.options )
1024                                 ret.push( elem );
1025
1026                         else
1027                                 ret = jQuery.merge( ret, elem );
1028
1029                 });
1030
1031                 return ret;
1032         },
1033
1034         attr: function( elem, name, value ) {
1035                 // don't set attributes on text and comment nodes
1036                 if (!elem || elem.nodeType == 3 || elem.nodeType == 8)
1037                         return undefined;
1038
1039                 var notxml = !jQuery.isXMLDoc( elem ),
1040                         // Whether we are setting (or getting)
1041                         set = value !== undefined,
1042                         msie = jQuery.browser.msie;
1043
1044                 // Try to normalize/fix the name
1045                 name = notxml && jQuery.props[ name ] || name;
1046
1047                 // Only do all the following if this is a node (faster for style)
1048                 // IE elem.getAttribute passes even for style
1049                 if ( elem.tagName ) {
1050
1051                         // These attributes require special treatment
1052                         var special = /href|src|style/.test( name );
1053
1054                         // Safari mis-reports the default selected property of a hidden option
1055                         // Accessing the parent's selectedIndex property fixes it
1056                         if ( name == "selected" && jQuery.browser.safari )
1057                                 elem.parentNode.selectedIndex;
1058
1059                         // If applicable, access the attribute via the DOM 0 way
1060                         if ( notxml && !special && name in elem ) {
1061                                 if ( set ){
1062                                         // We can't allow the type property to be changed (since it causes problems in IE)
1063                                         if ( name == "type" && jQuery.nodeName( elem, "input" ) && elem.parentNode )
1064                                                 throw "type property can't be changed";
1065
1066                                         elem[ name ] = value;
1067                                 }
1068
1069                                 // browsers index elements by id/name on forms, give priority to attributes.
1070                                 if( jQuery.nodeName( elem, "form" ) && elem.getAttributeNode(name) )
1071                                         return elem.getAttributeNode( name ).nodeValue;
1072
1073                                 return elem[ name ];
1074                         }
1075
1076                         if ( msie && notxml &&  name == "style" )
1077                                 return jQuery.attr( elem.style, "cssText", value );
1078
1079                         if ( set )
1080                                 // convert the value to a string (all browsers do this but IE) see #1070
1081                                 elem.setAttribute( name, "" + value );
1082
1083                         if ( msie && special && notxml )
1084                                 return elem.getAttribute( name, 2 );
1085
1086                         return elem.getAttribute( name );
1087
1088                 }
1089
1090                 // elem is actually elem.style ... set the style
1091
1092                 // IE uses filters for opacity
1093                 if ( msie && name == "opacity" ) {
1094                         if ( set ) {
1095                                 // IE has trouble with opacity if it does not have layout
1096                                 // Force it by setting the zoom level
1097                                 elem.zoom = 1;
1098
1099                                 // Set the alpha filter to set the opacity
1100                                 elem.filter = (elem.filter || "").replace( /alpha\([^)]*\)/, "" ) +
1101                                         (parseInt( value ) + '' == "NaN" ? "" : "alpha(opacity=" + value * 100 + ")");
1102                         }
1103
1104                         return elem.filter && elem.filter.indexOf("opacity=") >= 0 ?
1105                                 (parseFloat( elem.filter.match(/opacity=([^)]*)/)[1] ) / 100) + '':
1106                                 "";
1107                 }
1108
1109                 name = name.replace(/-([a-z])/ig, function(all, letter){
1110                         return letter.toUpperCase();
1111                 });
1112
1113                 if ( set )
1114                         elem[ name ] = value;
1115
1116                 return elem[ name ];
1117         },
1118
1119         trim: function( text ) {
1120                 return (text || "").replace( /^\s+|\s+$/g, "" );
1121         },
1122
1123         makeArray: function( array ) {
1124                 var ret = [];
1125
1126                 if( array != null ){
1127                         var i = array.length;
1128                         //the window, strings and functions also have 'length'
1129                         if( i == null || array.split || array.setInterval || array.call )
1130                                 ret[0] = array;
1131                         else
1132                                 while( i )
1133                                         ret[--i] = array[i];
1134                 }
1135
1136                 return ret;
1137         },
1138
1139         inArray: function( elem, array ) {
1140                 for ( var i = 0, length = array.length; i < length; i++ )
1141                 // Use === because on IE, window == document
1142                         if ( array[ i ] === elem )
1143                                 return i;
1144
1145                 return -1;
1146         },
1147
1148         merge: function( first, second ) {
1149                 // We have to loop this way because IE & Opera overwrite the length
1150                 // expando of getElementsByTagName
1151                 var i = 0, elem, pos = first.length;
1152                 // Also, we need to make sure that the correct elements are being returned
1153                 // (IE returns comment nodes in a '*' query)
1154                 if ( jQuery.browser.msie ) {
1155                         while ( elem = second[ i++ ] )
1156                                 if ( elem.nodeType != 8 )
1157                                         first[ pos++ ] = elem;
1158
1159                 } else
1160                         while ( elem = second[ i++ ] )
1161                                 first[ pos++ ] = elem;
1162
1163                 return first;
1164         },
1165
1166         unique: function( array ) {
1167                 var ret = [], done = {};
1168
1169                 try {
1170
1171                         for ( var i = 0, length = array.length; i < length; i++ ) {
1172                                 var id = jQuery.data( array[ i ] );
1173
1174                                 if ( !done[ id ] ) {
1175                                         done[ id ] = true;
1176                                         ret.push( array[ i ] );
1177                                 }
1178                         }
1179
1180                 } catch( e ) {
1181                         ret = array;
1182                 }
1183
1184                 return ret;
1185         },
1186
1187         grep: function( elems, callback, inv ) {
1188                 var ret = [];
1189
1190                 // Go through the array, only saving the items
1191                 // that pass the validator function
1192                 for ( var i = 0, length = elems.length; i < length; i++ )
1193                         if ( !inv != !callback( elems[ i ], i ) )
1194                                 ret.push( elems[ i ] );
1195
1196                 return ret;
1197         },
1198
1199         map: function( elems, callback ) {
1200                 var ret = [];
1201
1202                 // Go through the array, translating each of the items to their
1203                 // new value (or values).
1204                 for ( var i = 0, length = elems.length; i < length; i++ ) {
1205                         var value = callback( elems[ i ], i );
1206
1207                         if ( value != null )
1208                                 ret[ ret.length ] = value;
1209                 }
1210
1211                 return ret.concat.apply( [], ret );
1212         }
1213 });
1214
1215 var userAgent = navigator.userAgent.toLowerCase();
1216
1217 // Figure out what browser is being used
1218 jQuery.browser = {
1219         version: (userAgent.match( /.+(?:rv|it|ra|ie)[\/: ]([\d.]+)/ ) || [])[1],
1220         safari: /webkit/.test( userAgent ),
1221         opera: /opera/.test( userAgent ),
1222         msie: /msie/.test( userAgent ) && !/opera/.test( userAgent ),
1223         mozilla: /mozilla/.test( userAgent ) && !/(compatible|webkit)/.test( userAgent )
1224 };
1225
1226 var styleFloat = jQuery.browser.msie ?
1227         "styleFloat" :
1228         "cssFloat";
1229
1230 jQuery.extend({
1231         // Check to see if the W3C box model is being used
1232         boxModel: !jQuery.browser.msie || document.compatMode == "CSS1Compat",
1233
1234         props: {
1235                 "for": "htmlFor",
1236                 "class": "className",
1237                 "float": styleFloat,
1238                 cssFloat: styleFloat,
1239                 styleFloat: styleFloat,
1240                 readonly: "readOnly",
1241                 maxlength: "maxLength",
1242                 cellspacing: "cellSpacing"
1243         }
1244 });
1245
1246 jQuery.each({
1247         parent: function(elem){return elem.parentNode;},
1248         parents: function(elem){return jQuery.dir(elem,"parentNode");},
1249         next: function(elem){return jQuery.nth(elem,2,"nextSibling");},
1250         prev: function(elem){return jQuery.nth(elem,2,"previousSibling");},
1251         nextAll: function(elem){return jQuery.dir(elem,"nextSibling");},
1252         prevAll: function(elem){return jQuery.dir(elem,"previousSibling");},
1253         siblings: function(elem){return jQuery.sibling(elem.parentNode.firstChild,elem);},
1254         children: function(elem){return jQuery.sibling(elem.firstChild);},
1255         contents: function(elem){return jQuery.nodeName(elem,"iframe")?elem.contentDocument||elem.contentWindow.document:jQuery.makeArray(elem.childNodes);}
1256 }, function(name, fn){
1257         jQuery.fn[ name ] = function( selector ) {
1258                 var ret = jQuery.map( this, fn );
1259
1260                 if ( selector && typeof selector == "string" )
1261                         ret = jQuery.multiFilter( selector, ret );
1262
1263                 return this.pushStack( jQuery.unique( ret ) );
1264         };
1265 });
1266
1267 jQuery.each({
1268         appendTo: "append",
1269         prependTo: "prepend",
1270         insertBefore: "before",
1271         insertAfter: "after",
1272         replaceAll: "replaceWith"
1273 }, function(name, original){
1274         jQuery.fn[ name ] = function() {
1275                 var args = arguments;
1276
1277                 return this.each(function(){
1278                         for ( var i = 0, length = args.length; i < length; i++ )
1279                                 jQuery( args[ i ] )[ original ]( this );
1280                 });
1281         };
1282 });
1283
1284 jQuery.each({
1285         removeAttr: function( name ) {
1286                 jQuery.attr( this, name, "" );
1287                 if (this.nodeType == 1)
1288                         this.removeAttribute( name );
1289         },
1290
1291         addClass: function( classNames ) {
1292                 jQuery.className.add( this, classNames );
1293         },
1294
1295         removeClass: function( classNames ) {
1296                 jQuery.className.remove( this, classNames );
1297         },
1298
1299         toggleClass: function( classNames ) {
1300                 jQuery.className[ jQuery.className.has( this, classNames ) ? "remove" : "add" ]( this, classNames );
1301         },
1302
1303         remove: function( selector ) {
1304                 if ( !selector || jQuery.filter( selector, [ this ] ).r.length ) {
1305                         // Prevent memory leaks
1306                         jQuery( "*", this ).add(this).each(function(){
1307                                 jQuery.event.remove(this);
1308                                 jQuery.removeData(this);
1309                         });
1310                         if (this.parentNode)
1311                                 this.parentNode.removeChild( this );
1312                 }
1313         },
1314
1315         empty: function() {
1316                 // Remove element nodes and prevent memory leaks
1317                 jQuery( ">*", this ).remove();
1318
1319                 // Remove any remaining nodes
1320                 while ( this.firstChild )
1321                         this.removeChild( this.firstChild );
1322         }
1323 }, function(name, fn){
1324         jQuery.fn[ name ] = function(){
1325                 return this.each( fn, arguments );
1326         };
1327 });
1328
1329 jQuery.each([ "Height", "Width" ], function(i, name){
1330         var type = name.toLowerCase();
1331
1332         jQuery.fn[ type ] = function( size ) {
1333                 // Get window width or height
1334                 return this[0] == window ?
1335                         // Opera reports document.body.client[Width/Height] properly in both quirks and standards
1336                         jQuery.browser.opera && document.body[ "client" + name ] ||
1337
1338                         // Safari reports inner[Width/Height] just fine (Mozilla and Opera include scroll bar widths)
1339                         jQuery.browser.safari && window[ "inner" + name ] ||
1340
1341                         // Everyone else use document.documentElement or document.body depending on Quirks vs Standards mode
1342                         document.compatMode == "CSS1Compat" && document.documentElement[ "client" + name ] || document.body[ "client" + name ] :
1343
1344                         // Get document width or height
1345                         this[0] == document ?
1346                                 // Either scroll[Width/Height] or offset[Width/Height], whichever is greater
1347                                 Math.max(
1348                                         Math.max(document.body["scroll" + name], document.documentElement["scroll" + name]),
1349                                         Math.max(document.body["offset" + name], document.documentElement["offset" + name])
1350                                 ) :
1351
1352                                 // Get or set width or height on the element
1353                                 size == undefined ?
1354                                         // Get width or height on the element
1355                                         (this.length ? jQuery.css( this[0], type ) : null) :
1356
1357                                         // Set the width or height on the element (default to pixels if value is unitless)
1358                                         this.css( type, size.constructor == String ? size : size + "px" );
1359         };
1360 });
1361
1362 // Helper function used by the dimensions and offset modules
1363 function num(elem, prop) {
1364         return elem[0] && parseInt( jQuery.curCSS(elem[0], prop, true), 10 ) || 0;
1365 }