src/core.js

   1 /*
   2  * jQuery @VERSION - New Wave Javascript
   3  *
   4  * Copyright (c) 2007 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 if ( window.jQuery )
  14         var _jQuery = window.jQuery;
  15
  16 var jQuery = window.jQuery = function( selector, context ) {
  17         // The jQuery object is actually just the init constructor 'enhanced'
  18         return new jQuery.prototype.init( selector, context );
  19 };
  20
  21 // Map over the $ in case of overwrite
  22 if ( window.$ )
  23         var _$ = window.$;
  24
  25 // Map the jQuery namespace to the '$' one
  26 window.$ = jQuery;
  27
  28 // A simple way to check for HTML strings or ID strings
  29 // (both of which we optimize for)
  30 var quickExpr = /^[^<]*(<(.|\s)+>)[^>]*$|^#(\w+)$/;
  31
  32 // Is it a simple selector
  33 var isSimple = /^.[^:#\[\.]*$/;
  34
  35 jQuery.fn = jQuery.prototype = {
  36         init: function( selector, context ) {
  37                 // Make sure that a selection was provided
  38                 selector = selector || document;
  39
  40                 // Handle $(DOMElement)
  41                 if ( selector.nodeType ) {
  42                         this[0] = selector;
  43                         this.length = 1;
  44                         return this;
  45
  46                 // Handle HTML strings
  47                 } else if ( typeof selector == "string" ) {
  48                         // Are we dealing with HTML string or an ID?
  49                         var match = quickExpr.exec( selector );
  50
  51                         // Verify a match, and that no context was specified for #id
  52                         if ( match && (match[1] || !context) ) {
  53
  54                                 // HANDLE: $(html) -> $(array)
  55                                 if ( match[1] )
  56                                         selector = jQuery.clean( [ match[1] ], context );
  57
  58                                 // HANDLE: $("#id")
  59                                 else {
  60                                         var elem = document.getElementById( match[3] );
  61
  62                                         // Make sure an element was located
  63                                         if ( elem )
  64                                                 // Handle the case where IE and Opera return items
  65                                                 // by name instead of ID
  66                                                 if ( elem.id != match[3] )
  67                                                         return jQuery().find( selector );
  68
  69                                                 // Otherwise, we inject the element directly into the jQuery object
  70                                                 else {
  71                                                         this[0] = elem;
  72                                                         this.length = 1;
  73                                                         return this;
  74                                                 }
  75
  76                                         else
  77                                                 selector = [];
  78                                 }
  79
  80                         // HANDLE: $(expr, [context])
  81                         // (which is just equivalent to: $(content).find(expr)
  82                         } else
  83                                 return new jQuery( context ).find( selector );
  84
  85                 // HANDLE: $(function)
  86                 // Shortcut for document ready
  87                 } else if ( jQuery.isFunction( selector ) )
  88                         return new jQuery( document )[ jQuery.fn.ready ? "ready" : "load" ]( selector );
  89
  90                 return this.setArray(
  91                         // HANDLE: $(array)
  92                         selector.constructor == Array && selector ||
  93
  94                         // HANDLE: $(arraylike)
  95                         // Watch for when an array-like object, contains DOM nodes, is passed in as the selector
  96                         (selector.jquery || selector.length && selector != window && !selector.nodeType && selector[0] != undefined && selector[0].nodeType) && jQuery.makeArray( selector ) ||
  97
  98                         // HANDLE: $(*)
  99                         [ selector ] );
 100         },
 101
 102         // The current version of jQuery being used
 103         jquery: "@VERSION",
 104
 105         // The number of elements contained in the matched element set
 106         size: function() {
 107                 return this.length;
 108         },
 109
 110         // The number of elements contained in the matched element set
 111         length: 0,
 112
 113         // Get the Nth element in the matched element set OR
 114         // Get the whole matched element set as a clean array
 115         get: function( num ) {
 116                 return num == undefined ?
 117
 118                         // Return a 'clean' array
 119                         jQuery.makeArray( this ) :
 120
 121                         // Return just the object
 122                         this[ num ];
 123         },
 124
 125         // Take an array of elements and push it onto the stack
 126         // (returning the new matched element set)
 127         pushStack: function( elems ) {
 128                 // Build a new jQuery matched element set
 129                 var ret = jQuery( elems );
 130
 131                 // Add the old object onto the stack (as a reference)
 132                 ret.prevObject = this;
 133
 134                 // Return the newly-formed element set
 135                 return ret;
 136         },
 137
 138         // Force the current matched set of elements to become
 139         // the specified array of elements (destroying the stack in the process)
 140         // You should use pushStack() in order to do this, but maintain the stack
 141         setArray: function( elems ) {
 142                 // Resetting the length to 0, then using the native Array push
 143                 // is a super-fast way to populate an object with array-like properties
 144                 this.length = 0;
 145                 Array.prototype.push.apply( this, elems );
 146
 147                 return this;
 148         },
 149
 150         // Execute a callback for every element in the matched set.
 151         // (You can seed the arguments with an array of args, but this is
 152         // only used internally.)
 153         each: function( callback, args ) {
 154                 return jQuery.each( this, callback, args );
 155         },
 156
 157         // Determine the position of an element within
 158         // the matched set of elements
 159         index: function( elem ) {
 160                 var ret = -1;
 161
 162                 // Locate the position of the desired element
 163                 this.each(function(i){
 164                         if ( this == elem )
 165                                 ret = i;
 166                 });
 167
 168                 return ret;
 169         },
 170
 171         attr: function( name, value, type ) {
 172                 var options = name;
 173
 174                 // Look for the case where we're accessing a style value
 175                 if ( name.constructor == String )
 176                         if ( value == undefined )
 177                                 return this.length && jQuery[ type || "attr" ]( this[0], name ) || undefined;
 178
 179                         else {
 180                                 options = {};
 181                                 options[ name ] = value;
 182                         }
 183
 184                 // Check to see if we're setting style values
 185                 return this.each(function(i){
 186                         // Set all the styles
 187                         for ( name in options )
 188                                 jQuery.attr(
 189                                         type ?
 190                                                 this.style :
 191                                                 this,
 192                                         name, jQuery.prop( this, options[ name ], type, i, name )
 193                                 );
 194                 });
 195         },
 196
 197         css: function( key, value ) {
 198                 // ignore negative width and height values
 199                 if ( (key == 'width' || key == 'height') && parseFloat(value) < 0 )
 200                         value = undefined;
 201                 return this.attr( key, value, "curCSS" );
 202         },
 203
 204         text: function( text ) {
 205                 if ( typeof text != "object" && text != null )
 206                         return this.empty().append( (this[0] && this[0].ownerDocument || document).createTextNode( text ) );
 207
 208                 var ret = "";
 209
 210                 jQuery.each( text || this, function(){
 211                         jQuery.each( this.childNodes, function(){
 212                                 if ( this.nodeType != 8 )
 213                                         ret += this.nodeType != 1 ?
 214                                                 this.nodeValue :
 215                                                 jQuery.fn.text( [ this ] );
 216                         });
 217                 });
 218
 219                 return ret;
 220         },
 221
 222         wrapAll: function( html ) {
 223                 if ( this[0] )
 224                         // The elements to wrap the target around
 225                         jQuery( html, this[0].ownerDocument )
 226                                 .clone()
 227                                 .insertBefore( this[0] )
 228                                 .map(function(){
 229                                         var elem = this;
 230
 231                                         while ( elem.firstChild )
 232                                                 elem = elem.firstChild;
 233
 234                                         return elem;
 235                                 })
 236                                 .append(this);
 237
 238                 return this;
 239         },
 240
 241         wrapInner: function( html ) {
 242                 return this.each(function(){
 243                         jQuery( this ).contents().wrapAll( html );
 244                 });
 245         },
 246
 247         wrap: function( html ) {
 248                 return this.each(function(){
 249                         jQuery( this ).wrapAll( html );
 250                 });
 251         },
 252
 253         append: function() {
 254                 return this.domManip(arguments, true, false, function(elem){
 255                         if (this.nodeType == 1)
 256                                 this.appendChild( elem );
 257                 });
 258         },
 259
 260         prepend: function() {
 261                 return this.domManip(arguments, true, true, function(elem){
 262                         if (this.nodeType == 1)
 263                                 this.insertBefore( elem, this.firstChild );
 264                 });
 265         },
 266
 267         before: function() {
 268                 return this.domManip(arguments, false, false, function(elem){
 269                         this.parentNode.insertBefore( elem, this );
 270                 });
 271         },
 272
 273         after: function() {
 274                 return this.domManip(arguments, false, true, function(elem){
 275                         this.parentNode.insertBefore( elem, this.nextSibling );
 276                 });
 277         },
 278
 279         end: function() {
 280                 return this.prevObject || jQuery( [] );
 281         },
 282
 283         find: function( selector ) {
 284                 var elems = jQuery.map(this, function(elem){
 285                         return jQuery.find( selector, elem );
 286                 });
 287
 288                 return this.pushStack( /[^+>] [^+>]/.test( selector ) || selector.indexOf("..") > -1 ?
 289                         jQuery.unique( elems ) :
 290                         elems );
 291         },
 292
 293         clone: function( events ) {
 294                 // Do the clone
 295                 var ret = this.map(function(){
 296                         if ( jQuery.browser.msie && !jQuery.isXMLDoc(this) ) {
 297                                 // IE copies events bound via attachEvent when
 298                                 // using cloneNode. Calling detachEvent on the
 299                                 // clone will also remove the events from the orignal
 300                                 // In order to get around this, we use innerHTML.
 301                                 // Unfortunately, this means some modifications to
 302                                 // attributes in IE that are actually only stored
 303                                 // as properties will not be copied (such as the
 304                                 // the name attribute on an input).
 305                                 var clone = this.cloneNode(true),
 306                                         container = document.createElement("div"),
 307                                         container2 = document.createElement("div");
 308                                 container.appendChild(clone);
 309                                 container2.innerHTML = container.innerHTML;
 310                                 return container2.firstChild;
 311                         } else
 312                                 return this.cloneNode(true);
 313                 });
 314
 315                 // Need to set the expando to null on the cloned set if it exists
 316                 // removeData doesn't work here, IE removes it from the original as well
 317                 // this is primarily for IE but the data expando shouldn't be copied over in any browser
 318                 var clone = ret.find("*").andSelf().each(function(){
 319                         if ( this[ expando ] != undefined )
 320                                 this[ expando ] = null;
 321                 });
 322
 323                 // Copy the events from the original to the clone
 324                 if ( events === true )
 325                         this.find("*").andSelf().each(function(i){
 326                                 if (this.nodeType == 3)
 327                                         return;
 328                                 var events = jQuery.data( this, "events" );
 329
 330                                 for ( var type in events )
 331                                         for ( var handler in events[ type ] )
 332                                                 jQuery.event.add( clone[ i ], type, events[ type ][ handler ], events[ type ][ handler ].data );
 333                         });
 334
 335                 // Return the cloned set
 336                 return ret;
 337         },
 338
 339         filter: function( selector ) {
 340                 return this.pushStack(
 341                         jQuery.isFunction( selector ) &&
 342                         jQuery.grep(this, function(elem, i){
 343                                 return selector.call( elem, i );
 344                         }) ||
 345
 346                         jQuery.multiFilter( selector, this ) );
 347         },
 348
 349         not: function( selector ) {
 350                 if ( selector.constructor == String )
 351                         // test special case where just one selector is passed in
 352                         if ( isSimple.test( selector ) )
 353                                 return this.pushStack( jQuery.multiFilter( selector, this, true ) );
 354                         else
 355                                 selector = jQuery.multiFilter( selector, this );
 356
 357                 var isArrayLike = selector.length && selector[selector.length - 1] !== undefined && !selector.nodeType;
 358                 return this.filter(function() {
 359                         return isArrayLike ? jQuery.inArray( this, selector ) < 0 : this != selector;
 360                 });
 361         },
 362
 363         add: function( selector ) {
 364                 return !selector ? this : this.pushStack( jQuery.merge(
 365                         this.get(),
 366                         selector.constructor == String ?
 367                                 jQuery( selector ).get() :
 368                                 selector.length != undefined && (!selector.nodeName || jQuery.nodeName(selector, "form")) ?
 369                                         selector : [selector] ) );
 370         },
 371
 372         is: function( selector ) {
 373                 return selector ?
 374                         jQuery.multiFilter( selector, this ).length > 0 :
 375                         false;
 376         },
 377
 378         hasClass: function( selector ) {
 379                 return this.is( "." + selector );
 380         },
 381
 382         val: function( value ) {
 383                 if ( value == undefined ) {
 384
 385                         if ( this.length ) {
 386                                 var elem = this[0];
 387
 388                                 // We need to handle select boxes special
 389                                 if ( jQuery.nodeName( elem, "select" ) ) {
 390                                         var index = elem.selectedIndex,
 391                                                 values = [],
 392                                                 options = elem.options,
 393                                                 one = elem.type == "select-one";
 394
 395                                         // Nothing was selected
 396                                         if ( index < 0 )
 397                                                 return null;
 398
 399                                         // Loop through all the selected options
 400                                         for ( var i = one ? index : 0, max = one ? index + 1 : options.length; i < max; i++ ) {
 401                                                 var option = options[ i ];
 402
 403                                                 if ( option.selected ) {
 404                                                         // Get the specifc value for the option
 405                                                         value = jQuery.browser.msie && !option.attributes.value.specified ? option.text : option.value;
 406
 407                                                         // We don't need an array for one selects
 408                                                         if ( one )
 409                                                                 return value;
 410
 411                                                         // Multi-Selects return an array
 412                                                         values.push( value );
 413                                                 }
 414                                         }
 415
 416                                         return values;
 417
 418                                 // Everything else, we just grab the value
 419                                 } else
 420                                         return (this[0].value || "").replace(/\r/g, "");
 421
 422                         }
 423
 424                         return undefined;
 425                 }
 426
 427                 return this.each(function(){
 428                         if ( this.nodeType != 1 )
 429                                 return;
 430
 431                         if ( value.constructor == Array && /radio|checkbox/.test( this.type ) )
 432                                 this.checked = (jQuery.inArray(this.value, value) >= 0 ||
 433                                         jQuery.inArray(this.name, value) >= 0);
 434
 435                         else if ( jQuery.nodeName( this, "select" ) ) {
 436                                 var values = value.constructor == Array ?
 437                                         value :
 438                                         [ value ];
 439
 440                                 jQuery( "option", this ).each(function(){
 441                                         this.selected = (jQuery.inArray( this.value, values ) >= 0 ||
 442                                                 jQuery.inArray( this.text, values ) >= 0);
 443                                 });
 444
 445                                 if ( !values.length )
 446                                         this.selectedIndex = -1;
 447
 448                         } else
 449                                 this.value = value;
 450                 });
 451         },
 452
 453         html: function( value ) {
 454                 return value == undefined ?
 455                         (this.length ?
 456                                 this[0].innerHTML :
 457                                 null) :
 458                         this.empty().append( value );
 459         },
 460
 461         replaceWith: function( value ) {
 462                 return this.after( value ).remove();
 463         },
 464
 465         eq: function( i ) {
 466                 return this.slice( i, i + 1 );
 467         },
 468
 469         slice: function() {
 470                 return this.pushStack( Array.prototype.slice.apply( this, arguments ) );
 471         },
 472
 473         map: function( callback ) {
 474                 return this.pushStack( jQuery.map(this, function(elem, i){
 475                         return callback.call( elem, i, elem );
 476                 }));
 477         },
 478
 479         andSelf: function() {
 480                 return this.add( this.prevObject );
 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.prototype.init.prototype = jQuery.prototype;
 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 jQuery.extend = jQuery.fn.extend = function() {
 543         // copy reference to target object
 544         var target = arguments[0] || {}, i = 1, length = arguments.length, deep = false, options;
 545
 546         // Handle a deep copy situation
 547         if ( target.constructor == Boolean ) {
 548                 deep = target;
 549                 target = arguments[1] || {};
 550                 // skip the boolean and the target
 551                 i = 2;
 552         }
 553
 554         // Handle case when target is a string or something (possible in deep copy)
 555         if ( typeof target != "object" && typeof target != "function" )
 556                 target = {};
 557
 558         // extend jQuery itself if only one argument is passed
 559         if ( length == 1 ) {
 560                 target = this;
 561                 i = 0;
 562         }
 563
 564         for ( ; i < length; i++ )
 565                 // Only deal with non-null/undefined values
 566                 if ( (options = arguments[ i ]) != null )
 567                         // Extend the base object
 568                         for ( var name in options ) {
 569                                 // Prevent never-ending loop
 570                                 if ( target === options[ name ] )
 571                                         continue;
 572
 573                                 // Recurse if we're merging object values
 574                                 if ( deep && options[ name ] && typeof options[ name ] == "object" && target[ name ] && !options[ name ].nodeType )
 575                                         target[ name ] = jQuery.extend( target[ name ], options[ name ] );
 576
 577                                 // Don't bring in undefined values
 578                                 else if ( options[ name ] != undefined )
 579                                         target[ name ] = options[ name ];
 580
 581                         }
 582
 583         // Return the modified object
 584         return target;
 585 };
 586
 587 var expando = "jQuery" + (new Date()).getTime(), uuid = 0, windowData = {};
 588
 589 // exclude the following css properties to add px
 590 var exclude = /z-?index|font-?weight|opacity|zoom|line-?height/i;
 591
 592 jQuery.extend({
 593         noConflict: function( deep ) {
 594                 window.$ = _$;
 595
 596                 if ( deep )
 597                         window.jQuery = _jQuery;
 598
 599                 return jQuery;
 600         },
 601
 602         // See test/unit/core.js for details concerning this function.
 603         isFunction: function( fn ) {
 604                 return !!fn && typeof fn != "string" && !fn.nodeName &&
 605                         fn.constructor != Array && /function/i.test( fn + "" );
 606         },
 607
 608         // check if an element is in a (or is an) XML document
 609         isXMLDoc: function( elem ) {
 610                 return elem.documentElement && !elem.body ||
 611                         elem.tagName && elem.ownerDocument && !elem.ownerDocument.body;
 612         },
 613
 614         // Evalulates a script in a global context
 615         globalEval: function( data ) {
 616                 data = jQuery.trim( data );
 617
 618                 if ( data ) {
 619                         // Inspired by code by Andrea Giammarchi
 620                         // http://webreflection.blogspot.com/2007/08/global-scope-evaluation-and-dom.html
 621                         var head = document.getElementsByTagName("head")[0] || document.documentElement,
 622                                 script = document.createElement("script");
 623
 624                         script.type = "text/javascript";
 625                         if ( jQuery.browser.msie )
 626                                 script.text = data;
 627                         else
 628                                 script.appendChild( document.createTextNode( data ) );
 629
 630                         head.appendChild( script );
 631                         head.removeChild( script );
 632                 }
 633         },
 634
 635         nodeName: function( elem, name ) {
 636                 return elem.nodeName && elem.nodeName.toUpperCase() == name.toUpperCase();
 637         },
 638
 639         cache: {},
 640
 641         data: function( elem, name, data ) {
 642                 elem = elem == window ?
 643                         windowData :
 644                         elem;
 645
 646                 var id = elem[ expando ];
 647
 648                 // Compute a unique ID for the element
 649                 if ( !id )
 650                         id = elem[ expando ] = ++uuid;
 651
 652                 // Only generate the data cache if we're
 653                 // trying to access or manipulate it
 654                 if ( name && !jQuery.cache[ id ] )
 655                         jQuery.cache[ id ] = {};
 656
 657                 // Prevent overriding the named cache with undefined values
 658                 if ( data != undefined )
 659                         jQuery.cache[ id ][ name ] = data;
 660
 661                 // Return the named cache data, or the ID for the element
 662                 return name ?
 663                         jQuery.cache[ id ][ name ] :
 664                         id;
 665         },
 666
 667         removeData: function( elem, name ) {
 668                 elem = elem == window ?
 669                         windowData :
 670                         elem;
 671
 672                 var id = elem[ expando ];
 673
 674                 // If we want to remove a specific section of the element's data
 675                 if ( name ) {
 676                         if ( jQuery.cache[ id ] ) {
 677                                 // Remove the section of cache data
 678                                 delete jQuery.cache[ id ][ name ];
 679
 680                                 // If we've removed all the data, remove the element's cache
 681                                 name = "";
 682
 683                                 for ( name in jQuery.cache[ id ] )
 684                                         break;
 685
 686                                 if ( !name )
 687                                         jQuery.removeData( elem );
 688                         }
 689
 690                 // Otherwise, we want to remove all of the element's data
 691                 } else {
 692                         // Clean up the element expando
 693                         try {
 694                                 delete elem[ expando ];
 695                         } catch(e){
 696                                 // IE has trouble directly removing the expando
 697                                 // but it's ok with using removeAttribute
 698                                 if ( elem.removeAttribute )
 699                                         elem.removeAttribute( expando );
 700                         }
 701
 702                         // Completely remove the data cache
 703                         delete jQuery.cache[ id ];
 704                 }
 705         },
 706
 707         // args is for internal usage only
 708         each: function( object, callback, args ) {
 709                 if ( args ) {
 710                         if ( object.length == undefined )
 711                                 for ( var name in object )
 712                                         callback.apply( object[ name ], args );
 713                         else
 714                                 for ( var i = 0, length = object.length; i < length; i++ )
 715                                         if ( callback.apply( object[ i ], args ) === false )
 716                                                 break;
 717
 718                 // A special, fast, case for the most common use of each
 719                 } else {
 720                         if ( object.length == undefined )
 721                                 for ( var name in object )
 722                                         callback.call( object[ name ], name, object[ name ] );
 723                         else
 724                                 for ( var i = 0, length = object.length, value = object[0];
 725                                         i < length && callback.call( value, i, value ) !== false; value = object[++i] ){}
 726                 }
 727
 728                 return object;
 729         },
 730
 731         prop: function( elem, value, type, i, name ) {
 732                         // Handle executable functions
 733                         if ( jQuery.isFunction( value ) )
 734                                 value = value.call( elem, i );
 735
 736                         // Handle passing in a number to a CSS property
 737                         return value && value.constructor == Number && type == "curCSS" && !exclude.test( name ) ?
 738                                 value + "px" :
 739                                 value;
 740         },
 741
 742         className: {
 743                 // internal only, use addClass("class")
 744                 add: function( elem, classNames ) {
 745                         jQuery.each((classNames || "").split(/\s+/), function(i, className){
 746                                 if ( elem.nodeType == 1 && !jQuery.className.has( elem.className, className ) )
 747                                         elem.className += (elem.className ? " " : "") + className;
 748                         });
 749                 },
 750
 751                 // internal only, use removeClass("class")
 752                 remove: function( elem, classNames ) {
 753                         if (elem.nodeType == 1)
 754                                 elem.className = classNames != undefined ?
 755                                         jQuery.grep(elem.className.split(/\s+/), function(className){
 756                                                 return !jQuery.className.has( classNames, className );
 757                                         }).join(" ") :
 758                                         "";
 759                 },
 760
 761                 // internal only, use is(".class")
 762                 has: function( elem, className ) {
 763                         return jQuery.inArray( className, (elem.className || elem).toString().split(/\s+/) ) > -1;
 764                 }
 765         },
 766
 767         // A method for quickly swapping in/out CSS properties to get correct calculations
 768         swap: function( elem, options, callback ) {
 769                 var old = {};
 770                 // Remember the old values, and insert the new ones
 771                 for ( var name in options ) {
 772                         old[ name ] = elem.style[ name ];
 773                         elem.style[ name ] = options[ name ];
 774                 }
 775
 776                 callback.call( elem );
 777
 778                 // Revert the old values
 779                 for ( var name in options )
 780                         elem.style[ name ] = old[ name ];
 781         },
 782
 783         css: function( elem, name, force ) {
 784                 if ( name == "width" || name == "height" ) {
 785                         var val, props = { position: "absolute", visibility: "hidden", display:"block" }, which = name == "width" ? [ "Left", "Right" ] : [ "Top", "Bottom" ];
 786
 787                         function getWH() {
 788                                 val = name == "width" ? elem.offsetWidth : elem.offsetHeight;
 789                                 var padding = 0, border = 0;
 790                                 jQuery.each( which, function() {
 791                                         padding += parseFloat(jQuery.curCSS( elem, "padding" + this, true)) || 0;
 792                                         border += parseFloat(jQuery.curCSS( elem, "border" + this + "Width", true)) || 0;
 793                                 });
 794                                 val -= Math.round(padding + border);
 795                         }
 796
 797                         if ( jQuery(elem).is(":visible") )
 798                                 getWH();
 799                         else
 800                                 jQuery.swap( elem, props, getWH );
 801
 802                         return Math.max(0, val);
 803                 }
 804
 805                 return jQuery.curCSS( elem, name, force );
 806         },
 807
 808         curCSS: function( elem, name, force ) {
 809                 var ret;
 810
 811                 // A helper method for determining if an element's values are broken
 812                 function color( elem ) {
 813                         if ( !jQuery.browser.safari )
 814                                 return false;
 815
 816                         var ret = document.defaultView.getComputedStyle( elem, null );
 817                         return !ret || ret.getPropertyValue("color") == "";
 818                 }
 819
 820                 // We need to handle opacity special in IE
 821                 if ( name == "opacity" && jQuery.browser.msie ) {
 822                         ret = jQuery.attr( elem.style, "opacity" );
 823
 824                         return ret == "" ?
 825                                 "1" :
 826                                 ret;
 827                 }
 828                 // Opera sometimes will give the wrong display answer, this fixes it, see #2037
 829                 if ( jQuery.browser.opera && name == "display" ) {
 830                         var save = elem.style.display;
 831                         elem.style.display = "block";
 832                         elem.style.display = save;
 833                 }
 834
 835                 // Make sure we're using the right name for getting the float value
 836                 if ( name.match( /float/i ) )
 837                         name = styleFloat;
 838
 839                 if ( !force && elem.style[ name ] )
 840                         ret = elem.style[ name ];
 841
 842                 else if ( document.defaultView && document.defaultView.getComputedStyle ) {
 843
 844                         // Only "float" is needed here
 845                         if ( name.match( /float/i ) )
 846                                 name = "float";
 847
 848                         name = name.replace( /([A-Z])/g, "-$1" ).toLowerCase();
 849
 850                         var getComputedStyle = document.defaultView.getComputedStyle( elem, null );
 851
 852                         if ( getComputedStyle && !color( elem ) )
 853                                 ret = getComputedStyle.getPropertyValue( name );
 854
 855                         // If the element isn't reporting its values properly in Safari
 856                         // then some display: none elements are involved
 857                         else {
 858                                 var swap = [], stack = [];
 859
 860                                 // Locate all of the parent display: none elements
 861                                 for ( var a = elem; a && color(a); a = a.parentNode )
 862                                         stack.unshift(a);
 863
 864                                 // Go through and make them visible, but in reverse
 865                                 // (It would be better if we knew the exact display type that they had)
 866                                 for ( var i = 0; i < stack.length; i++ )
 867                                         if ( color( stack[ i ] ) ) {
 868                                                 swap[ i ] = stack[ i ].style.display;
 869                                                 stack[ i ].style.display = "block";
 870                                         }
 871
 872                                 // Since we flip the display style, we have to handle that
 873                                 // one special, otherwise get the value
 874                                 ret = name == "display" && swap[ stack.length - 1 ] != null ?
 875                                         "none" :
 876                                         ( getComputedStyle && getComputedStyle.getPropertyValue( name ) ) || "";
 877
 878                                 // Finally, revert the display styles back
 879                                 for ( var i = 0; i < swap.length; i++ )
 880                                         if ( swap[ i ] != null )
 881                                                 stack[ i ].style.display = swap[ i ];
 882                         }
 883
 884                         // We should always get a number back from opacity
 885                         if ( name == "opacity" && ret == "" )
 886                                 ret = "1";
 887
 888                 } else if ( elem.currentStyle ) {
 889                         var camelCase = name.replace(/\-(\w)/g, function(all, letter){
 890                                 return letter.toUpperCase();
 891                         });
 892
 893                         ret = elem.currentStyle[ name ] || elem.currentStyle[ camelCase ];
 894
 895                         // From the awesome hack by Dean Edwards
 896                         // http://erik.eae.net/archives/2007/07/27/18.54.15/#comment-102291
 897
 898                         // If we're not dealing with a regular pixel number
 899                         // but a number that has a weird ending, we need to convert it to pixels
 900                         if ( !/^\d+(px)?$/i.test( ret ) && /^\d/.test( ret ) ) {
 901                                 // Remember the original values
 902                                 var style = elem.style.left, runtimeStyle = elem.runtimeStyle.left;
 903
 904                                 // Put in the new values to get a computed value out
 905                                 elem.runtimeStyle.left = elem.currentStyle.left;
 906                                 elem.style.left = ret || 0;
 907                                 ret = elem.style.pixelLeft + "px";
 908
 909                                 // Revert the changed values
 910                                 elem.style.left = style;
 911                                 elem.runtimeStyle.left = runtimeStyle;
 912                         }
 913                 }
 914
 915                 return ret;
 916         },
 917
 918         clean: function( elems, context ) {
 919                 var ret = [];
 920                 context = context || document;
 921                 // !context.createElement fails in IE with an error but returns typeof 'object'
 922                 if (typeof context.createElement == 'undefined')
 923                         context = context.ownerDocument || context[0] && context[0].ownerDocument || document;
 924
 925                 jQuery.each(elems, function(i, elem){
 926                         if ( !elem )
 927                                 return;
 928
 929                         if ( elem.constructor == Number )
 930                                 elem = elem.toString();
 931
 932                         // Convert html string into DOM nodes
 933                         if ( typeof elem == "string" ) {
 934                                 // Fix "XHTML"-style tags in all browsers
 935                                 elem = elem.replace(/(<(\w+)[^>]*?)\/>/g, function(all, front, tag){
 936                                         return tag.match(/^(abbr|br|col|img|input|link|meta|param|hr|area|embed)$/i) ?
 937                                                 all :
 938                                                 front + "></" + tag + ">";
 939                                 });
 940
 941                                 // Trim whitespace, otherwise indexOf won't work as expected
 942                                 var tags = jQuery.trim( elem ).toLowerCase(), div = context.createElement("div");
 943
 944                                 var wrap =
 945                                         // option or optgroup
 946                                         !tags.indexOf("<opt") &&
 947                                         [ 1, "<select multiple='multiple'>", "</select>" ] ||
 948
 949                                         !tags.indexOf("<leg") &&
 950                                         [ 1, "<fieldset>", "</fieldset>" ] ||
 951
 952                                         tags.match(/^<(thead|tbody|tfoot|colg|cap)/) &&
 953                                         [ 1, "<table>", "</table>" ] ||
 954
 955                                         !tags.indexOf("<tr") &&
 956                                         [ 2, "<table><tbody>", "</tbody></table>" ] ||
 957
 958                                         // <thead> matched above
 959                                         (!tags.indexOf("<td") || !tags.indexOf("<th")) &&
 960                                         [ 3, "<table><tbody><tr>", "</tr></tbody></table>" ] ||
 961
 962                                         !tags.indexOf("<col") &&
 963                                         [ 2, "<table><tbody></tbody><colgroup>", "</colgroup></table>" ] ||
 964
 965                                         // IE can't serialize <link> and <script> tags normally
 966                                         jQuery.browser.msie &&
 967                                         [ 1, "div<div>", "</div>" ] ||
 968
 969                                         [ 0, "", "" ];
 970
 971                                 // Go to html and back, then peel off extra wrappers
 972                                 div.innerHTML = wrap[1] + elem + wrap[2];
 973
 974                                 // Move to the right depth
 975                                 while ( wrap[0]-- )
 976                                         div = div.lastChild;
 977
 978                                 // Remove IE's autoinserted <tbody> from table fragments
 979                                 if ( jQuery.browser.msie ) {
 980
 981                                         // String was a <table>, *may* have spurious <tbody>
 982                                         var tbody = !tags.indexOf("<table") && tags.indexOf("<tbody") < 0 ?
 983                                                 div.firstChild && div.firstChild.childNodes :
 984
 985                                                 // String was a bare <thead> or <tfoot>
 986                                                 wrap[1] == "<table>" && tags.indexOf("<tbody") < 0 ?
 987                                                         div.childNodes :
 988                                                         [];
 989
 990                                         for ( var j = tbody.length - 1; j >= 0 ; --j )
 991                                                 if ( jQuery.nodeName( tbody[ j ], "tbody" ) && !tbody[ j ].childNodes.length )
 992                                                         tbody[ j ].parentNode.removeChild( tbody[ j ] );
 993
 994                                         // IE completely kills leading whitespace when innerHTML is used
 995                                         if ( /^\s/.test( elem ) )
 996                                                 div.insertBefore( context.createTextNode( elem.match(/^\s*/)[0] ), div.firstChild );
 997
 998                                 }
 999
1000                                 elem = jQuery.makeArray( div.childNodes );
1001                         }
1002
1003                         if ( elem.length === 0 && (!jQuery.nodeName( elem, "form" ) && !jQuery.nodeName( elem, "select" )) )
1004                                 return;
1005
1006                         if ( elem[0] == undefined || jQuery.nodeName( elem, "form" ) || elem.options )
1007                                 ret.push( elem );
1008
1009                         else
1010                                 ret = jQuery.merge( ret, elem );
1011
1012                 });
1013
1014                 return ret;
1015         },
1016
1017         attr: function( elem, name, value ) {
1018                 // don't set attributes on text and comment nodes
1019                 if (!elem || elem.nodeType == 3 || elem.nodeType == 8)
1020                         return undefined;
1021
1022                 var fix = jQuery.isXMLDoc( elem ) ?
1023                         {} :
1024                         jQuery.props;
1025
1026                 // Safari mis-reports the default selected property of a hidden option
1027                 // Accessing the parent's selectedIndex property fixes it
1028                 if ( name == "selected" && jQuery.browser.safari )
1029                         elem.parentNode.selectedIndex;
1030
1031                 // Certain attributes only work when accessed via the old DOM 0 way
1032                 if ( fix[ name ] ) {
1033                         if ( value != undefined )
1034                                 elem[ fix[ name ] ] = value;
1035
1036                         return elem[ fix[ name ] ];
1037
1038                 } else if ( jQuery.browser.msie && name == "style" )
1039                         return jQuery.attr( elem.style, "cssText", value );
1040
1041                 else if ( value == undefined && jQuery.browser.msie && jQuery.nodeName( elem, "form" ) && (name == "action" || name == "method") )
1042                         return elem.getAttributeNode( name ).nodeValue;
1043
1044                 // IE elem.getAttribute passes even for style
1045                 else if ( elem.tagName ) {
1046
1047                         if ( value != undefined ) {
1048                                 // We can't allow the type property to be changed (since it causes problems in IE)
1049                                 if ( name == "type" && jQuery.nodeName( elem, "input" ) && elem.parentNode )
1050                                         throw "type property can't be changed";
1051
1052                                 // convert the value to a string (all browsers do this but IE) see #1070
1053                                 elem.setAttribute( name, "" + value );
1054                         }
1055
1056                         if ( jQuery.browser.msie && /href|src/.test( name ) && !jQuery.isXMLDoc( elem ) )
1057                                 return elem.getAttribute( name, 2 );
1058
1059                         return elem.getAttribute( name );
1060
1061                 // elem is actually elem.style ... set the style
1062                 } else {
1063                         // IE actually uses filters for opacity
1064                         if ( name == "opacity" && jQuery.browser.msie ) {
1065                                 if ( value != undefined ) {
1066                                         // IE has trouble with opacity if it does not have layout
1067                                         // Force it by setting the zoom level
1068                                         elem.zoom = 1;
1069
1070                                         // Set the alpha filter to set the opacity
1071                                         elem.filter = (elem.filter || "").replace( /alpha\([^)]*\)/, "" ) +
1072                                                 (parseFloat( value ).toString() == "NaN" ? "" : "alpha(opacity=" + value * 100 + ")");
1073                                 }
1074
1075                                 return elem.filter && elem.filter.indexOf("opacity=") >= 0 ?
1076                                         (parseFloat( elem.filter.match(/opacity=([^)]*)/)[1] ) / 100).toString() :
1077                                         "";
1078                         }
1079
1080                         name = name.replace(/-([a-z])/ig, function(all, letter){
1081                                 return letter.toUpperCase();
1082                         });
1083
1084                         if ( value != undefined )
1085                                 elem[ name ] = value;
1086
1087                         return elem[ name ];
1088                 }
1089         },
1090
1091         trim: function( text ) {
1092                 return (text || "").replace( /^\s+|\s+$/g, "" );
1093         },
1094
1095         makeArray: function( array ) {
1096                 var ret = [];
1097
1098                 // Need to use typeof to fight Safari childNodes crashes
1099                 if ( typeof array != "array" )
1100                         for ( var i = 0, length = array.length; i < length; i++ )
1101                                 ret.push( array[ i ] );
1102                 else
1103                         ret = array.slice( 0 );
1104
1105                 return ret;
1106         },
1107
1108         inArray: function( elem, array ) {
1109                 for ( var i = 0, length = array.length; i < length; i++ )
1110                         if ( array[ i ] == elem )
1111                                 return i;
1112
1113                 return -1;
1114         },
1115
1116         merge: function( first, second ) {
1117                 // We have to loop this way because IE & Opera overwrite the length
1118                 // expando of getElementsByTagName
1119
1120                 // Also, we need to make sure that the correct elements are being returned
1121                 // (IE returns comment nodes in a '*' query)
1122                 if ( jQuery.browser.msie ) {
1123                         for ( var i = 0; second[ i ]; i++ )
1124                                 if ( second[ i ].nodeType != 8 )
1125                                         first.push( second[ i ] );
1126
1127                 } else
1128                         for ( var i = 0; second[ i ]; i++ )
1129                                 first.push( second[ i ] );
1130
1131                 return first;
1132         },
1133
1134         unique: function( array ) {
1135                 var ret = [], done = {};
1136
1137                 try {
1138
1139                         for ( var i = 0, length = array.length; i < length; i++ ) {
1140                                 var id = jQuery.data( array[ i ] );
1141
1142                                 if ( !done[ id ] ) {
1143                                         done[ id ] = true;
1144                                         ret.push( array[ i ] );
1145                                 }
1146                         }
1147
1148                 } catch( e ) {
1149                         ret = array;
1150                 }
1151
1152                 return ret;
1153         },
1154
1155         grep: function( elems, callback, inv ) {
1156                 // If a string is passed in for the function, make a function
1157                 // for it (a handy shortcut)
1158                 if ( typeof callback == "string" )
1159                         callback = eval("false||function(a,i){return " + callback + "}");
1160
1161                 var ret = [];
1162
1163                 // Go through the array, only saving the items
1164                 // that pass the validator function
1165                 for ( var i = 0, length = elems.length; i < length; i++ )
1166                         if ( !inv && callback( elems[ i ], i ) || inv && !callback( elems[ i ], i ) )
1167                                 ret.push( elems[ i ] );
1168
1169                 return ret;
1170         },
1171
1172         map: function( elems, callback ) {
1173                 var ret = [];
1174
1175                 // Go through the array, translating each of the items to their
1176                 // new value (or values).
1177                 for ( var i = 0, length = elems.length; i < length; i++ ) {
1178                         var value = callback( elems[ i ], i );
1179
1180                         if ( value !== null && value != undefined ) {
1181                                 if ( value.constructor != Array )
1182                                         value = [ value ];
1183
1184                                 ret = ret.concat( value );
1185                         }
1186                 }
1187
1188                 return ret;
1189         }
1190 });
1191
1192 var userAgent = navigator.userAgent.toLowerCase();
1193
1194 // Figure out what browser is being used
1195 jQuery.browser = {
1196         version: (userAgent.match( /.+(?:rv|it|ra|ie)[\/: ]([\d.]+)/ ) || [])[1],
1197         safari: /webkit/.test( userAgent ),
1198         opera: /opera/.test( userAgent ),
1199         msie: /msie/.test( userAgent ) && !/opera/.test( userAgent ),
1200         mozilla: /mozilla/.test( userAgent ) && !/(compatible|webkit)/.test( userAgent )
1201 };
1202
1203 var styleFloat = jQuery.browser.msie ?
1204         "styleFloat" :
1205         "cssFloat";
1206
1207 jQuery.extend({
1208         // Check to see if the W3C box model is being used
1209         boxModel: !jQuery.browser.msie || document.compatMode == "CSS1Compat",
1210
1211         props: {
1212                 "for": "htmlFor",
1213                 "class": "className",
1214                 "float": styleFloat,
1215                 cssFloat: styleFloat,
1216                 styleFloat: styleFloat,
1217                 innerHTML: "innerHTML",
1218                 className: "className",
1219                 value: "value",
1220                 disabled: "disabled",
1221                 checked: "checked",
1222                 readonly: "readOnly",
1223                 selected: "selected",
1224                 maxlength: "maxLength",
1225                 selectedIndex: "selectedIndex",
1226                 defaultValue: "defaultValue",
1227                 tagName: "tagName",
1228                 nodeName: "nodeName"
1229         }
1230 });
1231
1232 jQuery.each({
1233         parent: "elem.parentNode",
1234         parents: "jQuery.dir(elem,'parentNode')",
1235         next: "jQuery.nth(elem,2,'nextSibling')",
1236         prev: "jQuery.nth(elem,2,'previousSibling')",
1237         nextAll: "jQuery.dir(elem,'nextSibling')",
1238         prevAll: "jQuery.dir(elem,'previousSibling')",
1239         siblings: "jQuery.sibling(elem.parentNode.firstChild,elem)",
1240         children: "jQuery.sibling(elem.firstChild)",
1241         contents: "jQuery.nodeName(elem,'iframe')?elem.contentDocument||elem.contentWindow.document:jQuery.makeArray(elem.childNodes)"
1242 }, function(name, fn){
1243         fn = eval("false||function(elem){return " + fn + "}");
1244
1245         jQuery.fn[ name ] = function( selector ) {
1246                 var ret = jQuery.map( this, fn );
1247
1248                 if ( selector && typeof selector == "string" )
1249                         ret = jQuery.multiFilter( selector, ret );
1250
1251                 return this.pushStack( jQuery.unique( ret ) );
1252         };
1253 });
1254
1255 jQuery.each({
1256         appendTo: "append",
1257         prependTo: "prepend",
1258         insertBefore: "before",
1259         insertAfter: "after",
1260         replaceAll: "replaceWith"
1261 }, function(name, original){
1262         jQuery.fn[ name ] = function() {
1263                 var args = arguments;
1264
1265                 return this.each(function(){
1266                         for ( var i = 0, length = args.length; i < length; i++ )
1267                                 jQuery( args[ i ] )[ original ]( this );
1268                 });
1269         };
1270 });
1271
1272 jQuery.each({
1273         removeAttr: function( name ) {
1274                 jQuery.attr( this, name, "" );
1275                 if (this.nodeType == 1)
1276                         this.removeAttribute( name );
1277         },
1278
1279         addClass: function( classNames ) {
1280                 jQuery.className.add( this, classNames );
1281         },
1282
1283         removeClass: function( classNames ) {
1284                 jQuery.className.remove( this, classNames );
1285         },
1286
1287         toggleClass: function( classNames ) {
1288                 jQuery.className[ jQuery.className.has( this, classNames ) ? "remove" : "add" ]( this, classNames );
1289         },
1290
1291         remove: function( selector ) {
1292                 if ( !selector || jQuery.filter( selector, [ this ] ).r.length ) {
1293                         // Prevent memory leaks
1294                         jQuery( "*", this ).add(this).each(function(){
1295                                 jQuery.event.remove(this);
1296                                 jQuery.removeData(this);
1297                         });
1298                         if (this.parentNode)
1299                                 this.parentNode.removeChild( this );
1300                 }
1301         },
1302
1303         empty: function() {
1304                 // Remove element nodes and prevent memory leaks
1305                 jQuery( ">*", this ).remove();
1306
1307                 // Remove any remaining nodes
1308                 while ( this.firstChild )
1309                         this.removeChild( this.firstChild );
1310         }
1311 }, function(name, fn){
1312         jQuery.fn[ name ] = function(){
1313                 return this.each( fn, arguments );
1314         };
1315 });
1316
1317 jQuery.each([ "Height", "Width" ], function(i, name){
1318         var type = name.toLowerCase();
1319
1320         jQuery.fn[ type ] = function( size ) {
1321                 // Get window width or height
1322                 return this[0] == window ?
1323                         // Opera reports document.body.client[Width/Height] properly in both quirks and standards
1324                         jQuery.browser.opera && document.body[ "client" + name ] ||
1325
1326                         // Safari reports inner[Width/Height] just fine (Mozilla and Opera include scroll bar widths)
1327                         jQuery.browser.safari && window[ "inner" + name ] ||
1328
1329                         // Everyone else use document.documentElement or document.body depending on Quirks vs Standards mode
1330                         document.compatMode == "CSS1Compat" && document.documentElement[ "client" + name ] || document.body[ "client" + name ] :
1331
1332                         // Get document width or height
1333                         this[0] == document ?
1334                                 // Either scroll[Width/Height] or offset[Width/Height], whichever is greater
1335                                 Math.max(
1336                                         Math.max(document.body["scroll" + name], document.documentElement["scroll" + name]),
1337                                         Math.max(document.body["offset" + name], document.documentElement["offset" + name])
1338                                 ) :
1339
1340                                 // Get or set width or height on the element
1341                                 size == undefined ?
1342                                         // Get width or height on the element
1343                                         (this.length ? jQuery.css( this[0], type ) : null) :
1344
1345                                         // Set the width or height on the element (default to pixels if value is unitless)
1346                                         this.css( type, size.constructor == String ? size : size + "px" );
1347         };
1348 });