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                                 var events = jQuery.data( this, "events" );
 327
 328                                 for ( var type in events )
 329                                         for ( var handler in events[ type ] )
 330                                                 jQuery.event.add( clone[ i ], type, events[ type ][ handler ], events[ type ][ handler ].data );
 331                         });
 332
 333                 // Return the cloned set
 334                 return ret;
 335         },
 336
 337         filter: function( selector ) {
 338                 return this.pushStack(
 339                         jQuery.isFunction( selector ) &&
 340                         jQuery.grep(this, function(elem, i){
 341                                 return selector.call( elem, i );
 342                         }) ||
 343
 344                         jQuery.multiFilter( selector, this ) );
 345         },
 346
 347         not: function( selector ) {
 348                 if ( selector.constructor == String )
 349                         // test special case where just one selector is passed in
 350                         if ( isSimple.test( selector ) )
 351                                 return this.pushStack( jQuery.multiFilter( selector, this, true ) );
 352                         else
 353                                 selector = jQuery.multiFilter( selector, this );
 354
 355                 var isArrayLike = selector.length && selector[selector.length - 1] !== undefined && !selector.nodeType;
 356                 return this.filter(function() {
 357                         return isArrayLike ? jQuery.inArray( this, selector ) < 0 : this != selector;
 358                 });
 359         },
 360
 361         add: function( selector ) {
 362                 return !selector ? this : this.pushStack( jQuery.merge(
 363                         this.get(),
 364                         selector.constructor == String ?
 365                                 jQuery( selector ).get() :
 366                                 selector.length != undefined && (!selector.nodeName || jQuery.nodeName(selector, "form")) ?
 367                                         selector : [selector] ) );
 368         },
 369
 370         is: function( selector ) {
 371                 return selector ?
 372                         jQuery.multiFilter( selector, this ).length > 0 :
 373                         false;
 374         },
 375
 376         hasClass: function( selector ) {
 377                 return this.is( "." + selector );
 378         },
 379
 380         val: function( value ) {
 381                 if ( value == undefined ) {
 382
 383                         if ( this.length ) {
 384                                 var elem = this[0];
 385
 386                                 // We need to handle select boxes special
 387                                 if ( jQuery.nodeName( elem, "select" ) ) {
 388                                         var index = elem.selectedIndex,
 389                                                 values = [],
 390                                                 options = elem.options,
 391                                                 one = elem.type == "select-one";
 392
 393                                         // Nothing was selected
 394                                         if ( index < 0 )
 395                                                 return null;
 396
 397                                         // Loop through all the selected options
 398                                         for ( var i = one ? index : 0, max = one ? index + 1 : options.length; i < max; i++ ) {
 399                                                 var option = options[ i ];
 400
 401                                                 if ( option.selected ) {
 402                                                         // Get the specifc value for the option
 403                                                         value = jQuery.browser.msie && !option.attributes.value.specified ? option.text : option.value;
 404
 405                                                         // We don't need an array for one selects
 406                                                         if ( one )
 407                                                                 return value;
 408
 409                                                         // Multi-Selects return an array
 410                                                         values.push( value );
 411                                                 }
 412                                         }
 413
 414                                         return values;
 415
 416                                 // Everything else, we just grab the value
 417                                 } else
 418                                         return (this[0].value || "").replace(/\r/g, "");
 419
 420                         }
 421
 422                 }
 423
 424                 return this.each(function(){
 425                         if ( this.nodeType != 1 )
 426                                 return;
 427
 428                         if ( value.constructor == Array && /radio|checkbox/.test( this.type ) )
 429                                 this.checked = (jQuery.inArray(this.value, value) >= 0 ||
 430                                         jQuery.inArray(this.name, value) >= 0);
 431
 432                         else if ( jQuery.nodeName( this, "select" ) ) {
 433                                 var values = value.constructor == Array ?
 434                                         value :
 435                                         [ value ];
 436
 437                                 jQuery( "option", this ).each(function(){
 438                                         this.selected = (jQuery.inArray( this.value, values ) >= 0 ||
 439                                                 jQuery.inArray( this.text, values ) >= 0);
 440                                 });
 441
 442                                 if ( !values.length )
 443                                         this.selectedIndex = -1;
 444
 445                         } else
 446                                 this.value = value;
 447                 });
 448         },
 449
 450         html: function( value ) {
 451                 return value == undefined ?
 452                         (this.length ?
 453                                 this[0].innerHTML :
 454                                 null) :
 455                         this.empty().append( value );
 456         },
 457
 458         replaceWith: function( value ) {
 459                 return this.after( value ).remove();
 460         },
 461
 462         eq: function( i ) {
 463                 return this.slice( i, i + 1 );
 464         },
 465
 466         slice: function() {
 467                 return this.pushStack( Array.prototype.slice.apply( this, arguments ) );
 468         },
 469
 470         map: function( callback ) {
 471                 return this.pushStack( jQuery.map(this, function(elem, i){
 472                         return callback.call( elem, i, elem );
 473                 }));
 474         },
 475
 476         andSelf: function() {
 477                 return this.add( this.prevObject );
 478         },
 479
 480         domManip: function( args, table, reverse, callback ) {
 481                 var clone = this.length > 1, elems;
 482
 483                 return this.each(function(){
 484                         if ( !elems ) {
 485                                 elems = jQuery.clean( args, this.ownerDocument );
 486
 487                                 if ( reverse )
 488                                         elems.reverse();
 489                         }
 490
 491                         var obj = this;
 492
 493                         if ( table && jQuery.nodeName( this, "table" ) && jQuery.nodeName( elems[0], "tr" ) )
 494                                 obj = this.getElementsByTagName("tbody")[0] || this.appendChild( this.ownerDocument.createElement("tbody") );
 495
 496                         var scripts = jQuery( [] );
 497
 498                         jQuery.each(elems, function(){
 499                                 var elem = clone ?
 500                                         this.cloneNode( true ) :
 501                                         this;
 502
 503                                 // execute all scripts after the elements have been injected
 504                                 if ( jQuery.nodeName( elem, "script" ) ) {
 505                                         scripts = scripts.add( elem );
 506                                 } else {
 507                                         // Remove any inner scripts for later evaluation
 508                                         if ( elem.nodeType == 1 )
 509                                                 scripts = scripts.add( jQuery( "script", elem ).remove() );
 510
 511                                         // Inject the elements into the document
 512                                         callback.call( obj, elem );
 513                                 }
 514                         });
 515
 516                         scripts.each( evalScript );
 517                 });
 518         }
 519 };
 520
 521 // Give the init function the jQuery prototype for later instantiation
 522 jQuery.prototype.init.prototype = jQuery.prototype;
 523
 524 function evalScript( i, elem ) {
 525         if ( elem.src )
 526                 jQuery.ajax({
 527                         url: elem.src,
 528                         async: false,
 529                         dataType: "script"
 530                 });
 531
 532         else
 533                 jQuery.globalEval( elem.text || elem.textContent || elem.innerHTML || "" );
 534
 535         if ( elem.parentNode )
 536                 elem.parentNode.removeChild( elem );
 537 }
 538
 539 jQuery.extend = jQuery.fn.extend = function() {
 540         // copy reference to target object
 541         var target = arguments[0] || {}, i = 1, length = arguments.length, deep = false, options;
 542
 543         // Handle a deep copy situation
 544         if ( target.constructor == Boolean ) {
 545                 deep = target;
 546                 target = arguments[1] || {};
 547                 // skip the boolean and the target
 548                 i = 2;
 549         }
 550
 551         // Handle case when target is a string or something (possible in deep copy)
 552         if ( typeof target != "object" && typeof target != "function" )
 553                 target = {};
 554
 555         // extend jQuery itself if only one argument is passed
 556         if ( length == 1 ) {
 557                 target = this;
 558                 i = 0;
 559         }
 560
 561         for ( ; i < length; i++ )
 562                 // Only deal with non-null/undefined values
 563                 if ( (options = arguments[ i ]) != null )
 564                         // Extend the base object
 565                         for ( var name in options ) {
 566                                 // Prevent never-ending loop
 567                                 if ( target === options[ name ] )
 568                                         continue;
 569
 570                                 // Recurse if we're merging object values
 571                                 if ( deep && options[ name ] && typeof options[ name ] == "object" && target[ name ] && !options[ name ].nodeType )
 572                                         target[ name ] = jQuery.extend( target[ name ], options[ name ] );
 573
 574                                 // Don't bring in undefined values
 575                                 else if ( options[ name ] != undefined )
 576                                         target[ name ] = options[ name ];
 577
 578                         }
 579
 580         // Return the modified object
 581         return target;
 582 };
 583
 584 var expando = "jQuery" + (new Date()).getTime(), uuid = 0, windowData = {};
 585
 586 // exclude the following css properties to add px
 587 var exclude = /z-?index|font-?weight|opacity|zoom|line-?height/i;
 588
 589 jQuery.extend({
 590         noConflict: function( deep ) {
 591                 window.$ = _$;
 592
 593                 if ( deep )
 594                         window.jQuery = _jQuery;
 595
 596                 return jQuery;
 597         },
 598
 599         // This may seem like some crazy code, but trust me when I say that this
 600         // is the only cross-browser way to do this. --John
 601         isFunction: function( fn ) {
 602                 return !!fn && typeof fn != "string" && !fn.nodeName &&
 603                         fn.constructor != Array && /function/i.test( fn + "" );
 604         },
 605
 606         // check if an element is in a (or is an) XML document
 607         isXMLDoc: function( elem ) {
 608                 return elem.documentElement && !elem.body ||
 609                         elem.tagName && elem.ownerDocument && !elem.ownerDocument.body;
 610         },
 611
 612         // Evalulates a script in a global context
 613         globalEval: function( data ) {
 614                 data = jQuery.trim( data );
 615
 616                 if ( data ) {
 617                         // Inspired by code by Andrea Giammarchi
 618                         // http://webreflection.blogspot.com/2007/08/global-scope-evaluation-and-dom.html
 619                         var head = document.getElementsByTagName("head")[0] || document.documentElement,
 620                                 script = document.createElement("script");
 621
 622                         script.type = "text/javascript";
 623                         if ( jQuery.browser.msie )
 624                                 script.text = data;
 625                         else
 626                                 script.appendChild( document.createTextNode( data ) );
 627
 628                         head.appendChild( script );
 629                         head.removeChild( script );
 630                 }
 631         },
 632
 633         nodeName: function( elem, name ) {
 634                 return elem.nodeName && elem.nodeName.toUpperCase() == name.toUpperCase();
 635         },
 636
 637         cache: {},
 638
 639         data: function( elem, name, data ) {
 640                 elem = elem == window ?
 641                         windowData :
 642                         elem;
 643
 644                 var id = elem[ expando ];
 645
 646                 // Compute a unique ID for the element
 647                 if ( !id )
 648                         id = elem[ expando ] = ++uuid;
 649
 650                 // Only generate the data cache if we're
 651                 // trying to access or manipulate it
 652                 if ( name && !jQuery.cache[ id ] )
 653                         jQuery.cache[ id ] = {};
 654
 655                 // Prevent overriding the named cache with undefined values
 656                 if ( data != undefined )
 657                         jQuery.cache[ id ][ name ] = data;
 658
 659                 // Return the named cache data, or the ID for the element
 660                 return name ?
 661                         jQuery.cache[ id ][ name ] :
 662                         id;
 663         },
 664
 665         removeData: function( elem, name ) {
 666                 elem = elem == window ?
 667                         windowData :
 668                         elem;
 669
 670                 var id = elem[ expando ];
 671
 672                 // If we want to remove a specific section of the element's data
 673                 if ( name ) {
 674                         if ( jQuery.cache[ id ] ) {
 675                                 // Remove the section of cache data
 676                                 delete jQuery.cache[ id ][ name ];
 677
 678                                 // If we've removed all the data, remove the element's cache
 679                                 name = "";
 680
 681                                 for ( name in jQuery.cache[ id ] )
 682                                         break;
 683
 684                                 if ( !name )
 685                                         jQuery.removeData( elem );
 686                         }
 687
 688                 // Otherwise, we want to remove all of the element's data
 689                 } else {
 690                         // Clean up the element expando
 691                         try {
 692                                 delete elem[ expando ];
 693                         } catch(e){
 694                                 // IE has trouble directly removing the expando
 695                                 // but it's ok with using removeAttribute
 696                                 if ( elem.removeAttribute )
 697                                         elem.removeAttribute( expando );
 698                         }
 699
 700                         // Completely remove the data cache
 701                         delete jQuery.cache[ id ];
 702                 }
 703         },
 704
 705         // args is for internal usage only
 706         each: function( object, callback, args ) {
 707                 if ( args ) {
 708                         if ( object.length == undefined )
 709                                 for ( var name in object )
 710                                         callback.apply( object[ name ], args );
 711                         else
 712                                 for ( var i = 0, length = object.length; i < length; i++ )
 713                                         if ( callback.apply( object[ i ], args ) === false )
 714                                                 break;
 715
 716                 // A special, fast, case for the most common use of each
 717                 } else {
 718                         if ( object.length == undefined )
 719                                 for ( var name in object )
 720                                         callback.call( object[ name ], name, object[ name ] );
 721                         else
 722                                 for ( var i = 0, length = object.length, value = object[0];
 723                                         i < length && callback.call( value, i, value ) !== false; value = object[++i] ){}
 724                 }
 725
 726                 return object;
 727         },
 728
 729         prop: function( elem, value, type, i, name ) {
 730                         // Handle executable functions
 731                         if ( jQuery.isFunction( value ) )
 732                                 value = value.call( elem, i );
 733
 734                         // Handle passing in a number to a CSS property
 735                         return value && value.constructor == Number && type == "curCSS" && !exclude.test( name ) ?
 736                                 value + "px" :
 737                                 value;
 738         },
 739
 740         className: {
 741                 // internal only, use addClass("class")
 742                 add: function( elem, classNames ) {
 743                         jQuery.each((classNames || "").split(/\s+/), function(i, className){
 744                                 if ( elem.nodeType == 1 && !jQuery.className.has( elem.className, className ) )
 745                                         elem.className += (elem.className ? " " : "") + className;
 746                         });
 747                 },
 748
 749                 // internal only, use removeClass("class")
 750                 remove: function( elem, classNames ) {
 751                         if (elem.nodeType == 1)
 752                                 elem.className = classNames != undefined ?
 753                                         jQuery.grep(elem.className.split(/\s+/), function(className){
 754                                                 return !jQuery.className.has( classNames, className );
 755                                         }).join(" ") :
 756                                         "";
 757                 },
 758
 759                 // internal only, use is(".class")
 760                 has: function( elem, className ) {
 761                         return jQuery.inArray( className, (elem.className || elem).toString().split(/\s+/) ) > -1;
 762                 }
 763         },
 764
 765         // A method for quickly swapping in/out CSS properties to get correct calculations
 766         swap: function( elem, options, callback ) {
 767                 var old = {};
 768                 // Remember the old values, and insert the new ones
 769                 for ( var name in options ) {
 770                         old[ name ] = elem.style[ name ];
 771                         elem.style[ name ] = options[ name ];
 772                 }
 773
 774                 callback.call( elem );
 775
 776                 // Revert the old values
 777                 for ( var name in options )
 778                         elem.style[ name ] = old[ name ];
 779         },
 780
 781         css: function( elem, name, force ) {
 782                 if ( name == "width" || name == "height" ) {
 783                         var val, props = { position: "absolute", visibility: "hidden", display:"block" }, which = name == "width" ? [ "Left", "Right" ] : [ "Top", "Bottom" ];
 784
 785                         function getWH() {
 786                                 val = name == "width" ? elem.offsetWidth : elem.offsetHeight;
 787                                 var padding = 0, border = 0;
 788                                 jQuery.each( which, function() {
 789                                         padding += parseFloat(jQuery.curCSS( elem, "padding" + this, true)) || 0;
 790                                         border += parseFloat(jQuery.curCSS( elem, "border" + this + "Width", true)) || 0;
 791                                 });
 792                                 val -= Math.round(padding + border);
 793                         }
 794
 795                         if ( jQuery(elem).is(":visible") )
 796                                 getWH();
 797                         else
 798                                 jQuery.swap( elem, props, getWH );
 799
 800                         return val;
 801                 }
 802
 803                 return jQuery.curCSS( elem, name, force );
 804         },
 805
 806         curCSS: function( elem, name, force ) {
 807                 var ret;
 808
 809                 // A helper method for determining if an element's values are broken
 810                 function color( elem ) {
 811                         if ( !jQuery.browser.safari )
 812                                 return false;
 813
 814                         var ret = document.defaultView.getComputedStyle( elem, null );
 815                         return !ret || ret.getPropertyValue("color") == "";
 816                 }
 817
 818                 // We need to handle opacity special in IE
 819                 if ( name == "opacity" && jQuery.browser.msie ) {
 820                         ret = jQuery.attr( elem.style, "opacity" );
 821
 822                         return ret == "" ?
 823                                 "1" :
 824                                 ret;
 825                 }
 826                 // Opera sometimes will give the wrong display answer, this fixes it, see #2037
 827                 if ( jQuery.browser.opera && name == "display" ) {
 828                         var save = elem.style.display;
 829                         elem.style.display = "block";
 830                         elem.style.display = save;
 831                 }
 832
 833                 // Make sure we're using the right name for getting the float value
 834                 if ( name.match( /float/i ) )
 835                         name = styleFloat;
 836
 837                 if ( !force && elem.style[ name ] )
 838                         ret = elem.style[ name ];
 839
 840                 else if ( document.defaultView && document.defaultView.getComputedStyle ) {
 841
 842                         // Only "float" is needed here
 843                         if ( name.match( /float/i ) )
 844                                 name = "float";
 845
 846                         name = name.replace( /([A-Z])/g, "-$1" ).toLowerCase();
 847
 848                         var getComputedStyle = document.defaultView.getComputedStyle( elem, null );
 849
 850                         if ( getComputedStyle && !color( elem ) )
 851                                 ret = getComputedStyle.getPropertyValue( name );
 852
 853                         // If the element isn't reporting its values properly in Safari
 854                         // then some display: none elements are involved
 855                         else {
 856                                 var swap = [], stack = [];
 857
 858                                 // Locate all of the parent display: none elements
 859                                 for ( var a = elem; a && color(a); a = a.parentNode )
 860                                         stack.unshift(a);
 861
 862                                 // Go through and make them visible, but in reverse
 863                                 // (It would be better if we knew the exact display type that they had)
 864                                 for ( var i = 0; i < stack.length; i++ )
 865                                         if ( color( stack[ i ] ) ) {
 866                                                 swap[ i ] = stack[ i ].style.display;
 867                                                 stack[ i ].style.display = "block";
 868                                         }
 869
 870                                 // Since we flip the display style, we have to handle that
 871                                 // one special, otherwise get the value
 872                                 ret = name == "display" && swap[ stack.length - 1 ] != null ?
 873                                         "none" :
 874                                         ( getComputedStyle && getComputedStyle.getPropertyValue( name ) ) || "";
 875
 876                                 // Finally, revert the display styles back
 877                                 for ( var i = 0; i < swap.length; i++ )
 878                                         if ( swap[ i ] != null )
 879                                                 stack[ i ].style.display = swap[ i ];
 880                         }
 881
 882                         // We should always get a number back from opacity
 883                         if ( name == "opacity" && ret == "" )
 884                                 ret = "1";
 885
 886                 } else if ( elem.currentStyle ) {
 887                         var camelCase = name.replace(/\-(\w)/g, function(all, letter){
 888                                 return letter.toUpperCase();
 889                         });
 890
 891                         ret = elem.currentStyle[ name ] || elem.currentStyle[ camelCase ];
 892
 893                         // From the awesome hack by Dean Edwards
 894                         // http://erik.eae.net/archives/2007/07/27/18.54.15/#comment-102291
 895
 896                         // If we're not dealing with a regular pixel number
 897                         // but a number that has a weird ending, we need to convert it to pixels
 898                         if ( !/^\d+(px)?$/i.test( ret ) && /^\d/.test( ret ) ) {
 899                                 // Remember the original values
 900                                 var style = elem.style.left, runtimeStyle = elem.runtimeStyle.left;
 901
 902                                 // Put in the new values to get a computed value out
 903                                 elem.runtimeStyle.left = elem.currentStyle.left;
 904                                 elem.style.left = ret || 0;
 905                                 ret = elem.style.pixelLeft + "px";
 906
 907                                 // Revert the changed values
 908                                 elem.style.left = style;
 909                                 elem.runtimeStyle.left = runtimeStyle;
 910                         }
 911                 }
 912
 913                 return ret;
 914         },
 915
 916         clean: function( elems, context ) {
 917                 var ret = [];
 918                 context = context || document;
 919                 // !context.createElement fails in IE with an error but returns typeof 'object'
 920                 if (typeof context.createElement == 'undefined')
 921                         context = context.ownerDocument || context[0] && context[0].ownerDocument || document;
 922
 923                 jQuery.each(elems, function(i, elem){
 924                         if ( !elem )
 925                                 return;
 926
 927                         if ( elem.constructor == Number )
 928                                 elem = elem.toString();
 929
 930                         // Convert html string into DOM nodes
 931                         if ( typeof elem == "string" ) {
 932                                 // Fix "XHTML"-style tags in all browsers
 933                                 elem = elem.replace(/(<(\w+)[^>]*?)\/>/g, function(all, front, tag){
 934                                         return tag.match(/^(abbr|br|col|img|input|link|meta|param|hr|area)$/i) ?
 935                                                 all :
 936                                                 front + "></" + tag + ">";
 937                                 });
 938
 939                                 // Trim whitespace, otherwise indexOf won't work as expected
 940                                 var tags = jQuery.trim( elem ).toLowerCase(), div = context.createElement("div");
 941
 942                                 var wrap =
 943                                         // option or optgroup
 944                                         !tags.indexOf("<opt") &&
 945                                         [ 1, "<select multiple='multiple'>", "</select>" ] ||
 946
 947                                         !tags.indexOf("<leg") &&
 948                                         [ 1, "<fieldset>", "</fieldset>" ] ||
 949
 950                                         tags.match(/^<(thead|tbody|tfoot|colg|cap)/) &&
 951                                         [ 1, "<table>", "</table>" ] ||
 952
 953                                         !tags.indexOf("<tr") &&
 954                                         [ 2, "<table><tbody>", "</tbody></table>" ] ||
 955
 956                                         // <thead> matched above
 957                                         (!tags.indexOf("<td") || !tags.indexOf("<th")) &&
 958                                         [ 3, "<table><tbody><tr>", "</tr></tbody></table>" ] ||
 959
 960                                         !tags.indexOf("<col") &&
 961                                         [ 2, "<table><tbody></tbody><colgroup>", "</colgroup></table>" ] ||
 962
 963                                         // IE can't serialize <link> and <script> tags normally
 964                                         jQuery.browser.msie &&
 965                                         [ 1, "div<div>", "</div>" ] ||
 966
 967                                         [ 0, "", "" ];
 968
 969                                 // Go to html and back, then peel off extra wrappers
 970                                 div.innerHTML = wrap[1] + elem + wrap[2];
 971
 972                                 // Move to the right depth
 973                                 while ( wrap[0]-- )
 974                                         div = div.lastChild;
 975
 976                                 // Remove IE's autoinserted <tbody> from table fragments
 977                                 if ( jQuery.browser.msie ) {
 978
 979                                         // String was a <table>, *may* have spurious <tbody>
 980                                         var tbody = !tags.indexOf("<table") && tags.indexOf("<tbody") < 0 ?
 981                                                 div.firstChild && div.firstChild.childNodes :
 982
 983                                                 // String was a bare <thead> or <tfoot>
 984                                                 wrap[1] == "<table>" && tags.indexOf("<tbody") < 0 ?
 985                                                         div.childNodes :
 986                                                         [];
 987
 988                                         for ( var j = tbody.length - 1; j >= 0 ; --j )
 989                                                 if ( jQuery.nodeName( tbody[ j ], "tbody" ) && !tbody[ j ].childNodes.length )
 990                                                         tbody[ j ].parentNode.removeChild( tbody[ j ] );
 991
 992                                         // IE completely kills leading whitespace when innerHTML is used
 993                                         if ( /^\s/.test( elem ) )
 994                                                 div.insertBefore( context.createTextNode( elem.match(/^\s*/)[0] ), div.firstChild );
 995
 996                                 }
 997
 998                                 elem = jQuery.makeArray( div.childNodes );
 999                         }
1000
1001                         if ( elem.length === 0 && (!jQuery.nodeName( elem, "form" ) && !jQuery.nodeName( elem, "select" )) )
1002                                 return;
1003
1004                         if ( elem[0] == undefined || jQuery.nodeName( elem, "form" ) || elem.options )
1005                                 ret.push( elem );
1006
1007                         else
1008                                 ret = jQuery.merge( ret, elem );
1009
1010                 });
1011
1012                 return ret;
1013         },
1014
1015         attr: function( elem, name, value ) {
1016                 // don't set attributes on text and comment nodes
1017                 if (!elem || elem.nodeType == 3 || elem.nodeType == 8)
1018                         return undefined;
1019
1020                 var fix = jQuery.isXMLDoc( elem ) ?
1021                         {} :
1022                         jQuery.props;
1023
1024                 // Safari mis-reports the default selected property of a hidden option
1025                 // Accessing the parent's selectedIndex property fixes it
1026                 if ( name == "selected" && jQuery.browser.safari )
1027                         elem.parentNode.selectedIndex;
1028
1029                 // Certain attributes only work when accessed via the old DOM 0 way
1030                 if ( fix[ name ] ) {
1031                         if ( value != undefined )
1032                                 elem[ fix[ name ] ] = value;
1033
1034                         return elem[ fix[ name ] ];
1035
1036                 } else if ( jQuery.browser.msie && name == "style" )
1037                         return jQuery.attr( elem.style, "cssText", value );
1038
1039                 else if ( value == undefined && jQuery.browser.msie && jQuery.nodeName( elem, "form" ) && (name == "action" || name == "method") )
1040                         return elem.getAttributeNode( name ).nodeValue;
1041
1042                 // IE elem.getAttribute passes even for style
1043                 else if ( elem.tagName ) {
1044
1045                         if ( value != undefined ) {
1046                                 // We can't allow the type property to be changed (since it causes problems in IE)
1047                                 if ( name == "type" && jQuery.nodeName( elem, "input" ) && elem.parentNode )
1048                                         throw "type property can't be changed";
1049
1050                                 // convert the value to a string (all browsers do this but IE) see #1070
1051                                 elem.setAttribute( name, "" + value );
1052                         }
1053
1054                         if ( jQuery.browser.msie && /href|src/.test( name ) && !jQuery.isXMLDoc( elem ) )
1055                                 return elem.getAttribute( name, 2 );
1056
1057                         return elem.getAttribute( name );
1058
1059                 // elem is actually elem.style ... set the style
1060                 } else {
1061                         // IE actually uses filters for opacity
1062                         if ( name == "opacity" && jQuery.browser.msie ) {
1063                                 if ( value != undefined ) {
1064                                         // IE has trouble with opacity if it does not have layout
1065                                         // Force it by setting the zoom level
1066                                         elem.zoom = 1;
1067
1068                                         // Set the alpha filter to set the opacity
1069                                         elem.filter = (elem.filter || "").replace( /alpha\([^)]*\)/, "" ) +
1070                                                 (parseFloat( value ).toString() == "NaN" ? "" : "alpha(opacity=" + value * 100 + ")");
1071                                 }
1072
1073                                 return elem.filter && elem.filter.indexOf("opacity=") >= 0 ?
1074                                         (parseFloat( elem.filter.match(/opacity=([^)]*)/)[1] ) / 100).toString() :
1075                                         "";
1076                         }
1077
1078                         name = name.replace(/-([a-z])/ig, function(all, letter){
1079                                 return letter.toUpperCase();
1080                         });
1081
1082                         if ( value != undefined )
1083                                 elem[ name ] = value;
1084
1085                         return elem[ name ];
1086                 }
1087         },
1088
1089         trim: function( text ) {
1090                 return (text || "").replace( /^\s+|\s+$/g, "" );
1091         },
1092
1093         makeArray: function( array ) {
1094                 var ret = [];
1095
1096                 // Need to use typeof to fight Safari childNodes crashes
1097                 if ( typeof array != "array" )
1098                         for ( var i = 0, length = array.length; i < length; i++ )
1099                                 ret.push( array[ i ] );
1100                 else
1101                         ret = array.slice( 0 );
1102
1103                 return ret;
1104         },
1105
1106         inArray: function( elem, array ) {
1107                 for ( var i = 0, length = array.length; i < length; i++ )
1108                         if ( array[ i ] == elem )
1109                                 return i;
1110
1111                 return -1;
1112         },
1113
1114         merge: function( first, second ) {
1115                 // We have to loop this way because IE & Opera overwrite the length
1116                 // expando of getElementsByTagName
1117
1118                 // Also, we need to make sure that the correct elements are being returned
1119                 // (IE returns comment nodes in a '*' query)
1120                 if ( jQuery.browser.msie ) {
1121                         for ( var i = 0; second[ i ]; i++ )
1122                                 if ( second[ i ].nodeType != 8 )
1123                                         first.push( second[ i ] );
1124
1125                 } else
1126                         for ( var i = 0; second[ i ]; i++ )
1127                                 first.push( second[ i ] );
1128
1129                 return first;
1130         },
1131
1132         unique: function( array ) {
1133                 var ret = [], done = {};
1134
1135                 try {
1136
1137                         for ( var i = 0, length = array.length; i < length; i++ ) {
1138                                 var id = jQuery.data( array[ i ] );
1139
1140                                 if ( !done[ id ] ) {
1141                                         done[ id ] = true;
1142                                         ret.push( array[ i ] );
1143                                 }
1144                         }
1145
1146                 } catch( e ) {
1147                         ret = array;
1148                 }
1149
1150                 return ret;
1151         },
1152
1153         grep: function( elems, callback, inv ) {
1154                 // If a string is passed in for the function, make a function
1155                 // for it (a handy shortcut)
1156                 if ( typeof callback == "string" )
1157                         callback = eval("false||function(a,i){return " + callback + "}");
1158
1159                 var ret = [];
1160
1161                 // Go through the array, only saving the items
1162                 // that pass the validator function
1163                 for ( var i = 0, length = elems.length; i < length; i++ )
1164                         if ( !inv && callback( elems[ i ], i ) || inv && !callback( elems[ i ], i ) )
1165                                 ret.push( elems[ i ] );
1166
1167                 return ret;
1168         },
1169
1170         map: function( elems, callback ) {
1171                 var ret = [];
1172
1173                 // Go through the array, translating each of the items to their
1174                 // new value (or values).
1175                 for ( var i = 0, length = elems.length; i < length; i++ ) {
1176                         var value = callback( elems[ i ], i );
1177
1178                         if ( value !== null && value != undefined ) {
1179                                 if ( value.constructor != Array )
1180                                         value = [ value ];
1181
1182                                 ret = ret.concat( value );
1183                         }
1184                 }
1185
1186                 return ret;
1187         }
1188 });
1189
1190 var userAgent = navigator.userAgent.toLowerCase();
1191
1192 // Figure out what browser is being used
1193 jQuery.browser = {
1194         version: (userAgent.match( /.+(?:rv|it|ra|ie)[\/: ]([\d.]+)/ ) || [])[1],
1195         safari: /webkit/.test( userAgent ),
1196         opera: /opera/.test( userAgent ),
1197         msie: /msie/.test( userAgent ) && !/opera/.test( userAgent ),
1198         mozilla: /mozilla/.test( userAgent ) && !/(compatible|webkit)/.test( userAgent )
1199 };
1200
1201 var styleFloat = jQuery.browser.msie ?
1202         "styleFloat" :
1203         "cssFloat";
1204
1205 jQuery.extend({
1206         // Check to see if the W3C box model is being used
1207         boxModel: !jQuery.browser.msie || document.compatMode == "CSS1Compat",
1208
1209         props: {
1210                 "for": "htmlFor",
1211                 "class": "className",
1212                 "float": styleFloat,
1213                 cssFloat: styleFloat,
1214                 styleFloat: styleFloat,
1215                 innerHTML: "innerHTML",
1216                 className: "className",
1217                 value: "value",
1218                 disabled: "disabled",
1219                 checked: "checked",
1220                 readonly: "readOnly",
1221                 selected: "selected",
1222                 maxlength: "maxLength",
1223                 selectedIndex: "selectedIndex",
1224                 defaultValue: "defaultValue",
1225                 tagName: "tagName",
1226                 nodeName: "nodeName"
1227         }
1228 });
1229
1230 jQuery.each({
1231         parent: "elem.parentNode",
1232         parents: "jQuery.dir(elem,'parentNode')",
1233         next: "jQuery.nth(elem,2,'nextSibling')",
1234         prev: "jQuery.nth(elem,2,'previousSibling')",
1235         nextAll: "jQuery.dir(elem,'nextSibling')",
1236         prevAll: "jQuery.dir(elem,'previousSibling')",
1237         siblings: "jQuery.sibling(elem.parentNode.firstChild,elem)",
1238         children: "jQuery.sibling(elem.firstChild)",
1239         contents: "jQuery.nodeName(elem,'iframe')?elem.contentDocument||elem.contentWindow.document:jQuery.makeArray(elem.childNodes)"
1240 }, function(name, fn){
1241         fn = eval("false||function(elem){return " + fn + "}");
1242
1243         jQuery.fn[ name ] = function( selector ) {
1244                 var ret = jQuery.map( this, fn );
1245
1246                 if ( selector && typeof selector == "string" )
1247                         ret = jQuery.multiFilter( selector, ret );
1248
1249                 return this.pushStack( jQuery.unique( ret ) );
1250         };
1251 });
1252
1253 jQuery.each({
1254         appendTo: "append",
1255         prependTo: "prepend",
1256         insertBefore: "before",
1257         insertAfter: "after",
1258         replaceAll: "replaceWith"
1259 }, function(name, original){
1260         jQuery.fn[ name ] = function() {
1261                 var args = arguments;
1262
1263                 return this.each(function(){
1264                         for ( var i = 0, length = args.length; i < length; i++ )
1265                                 jQuery( args[ i ] )[ original ]( this );
1266                 });
1267         };
1268 });
1269
1270 jQuery.each({
1271         removeAttr: function( name ) {
1272                 jQuery.attr( this, name, "" );
1273                 if (this.nodeType == 1)
1274                         this.removeAttribute( name );
1275         },
1276
1277         addClass: function( classNames ) {
1278                 jQuery.className.add( this, classNames );
1279         },
1280
1281         removeClass: function( classNames ) {
1282                 jQuery.className.remove( this, classNames );
1283         },
1284
1285         toggleClass: function( classNames ) {
1286                 jQuery.className[ jQuery.className.has( this, classNames ) ? "remove" : "add" ]( this, classNames );
1287         },
1288
1289         remove: function( selector ) {
1290                 if ( !selector || jQuery.filter( selector, [ this ] ).r.length ) {
1291                         // Prevent memory leaks
1292                         jQuery( "*", this ).add(this).each(function(){
1293                                 jQuery.event.remove(this);
1294                                 jQuery.removeData(this);
1295                         });
1296                         if (this.parentNode)
1297                                 this.parentNode.removeChild( this );
1298                 }
1299         },
1300
1301         empty: function() {
1302                 // Remove element nodes and prevent memory leaks
1303                 jQuery( ">*", this ).remove();
1304
1305                 // Remove any remaining nodes
1306                 while ( this.firstChild )
1307                         this.removeChild( this.firstChild );
1308         }
1309 }, function(name, fn){
1310         jQuery.fn[ name ] = function(){
1311                 return this.each( fn, arguments );
1312         };
1313 });
1314
1315 jQuery.each([ "Height", "Width" ], function(i, name){
1316         var type = name.toLowerCase();
1317
1318         jQuery.fn[ type ] = function( size ) {
1319                 // Get window width or height
1320                 return this[0] == window ?
1321                         // Opera reports document.body.client[Width/Height] properly in both quirks and standards
1322                         jQuery.browser.opera && document.body[ "client" + name ] ||
1323
1324                         // Safari reports inner[Width/Height] just fine (Mozilla and Opera include scroll bar widths)
1325                         jQuery.browser.safari && window[ "inner" + name ] ||
1326
1327                         // Everyone else use document.documentElement or document.body depending on Quirks vs Standards mode
1328                         document.compatMode == "CSS1Compat" && document.documentElement[ "client" + name ] || document.body[ "client" + name ] :
1329
1330                         // Get document width or height
1331                         this[0] == document ?
1332                                 // Either scroll[Width/Height] or offset[Width/Height], whichever is greater
1333                                 Math.max(
1334                                         Math.max(document.body["scroll" + name], document.documentElement["scroll" + name]),
1335                                         Math.max(document.body["offset" + name], document.documentElement["offset" + name])
1336                                 ) :
1337
1338                                 // Get or set width or height on the element
1339                                 size == undefined ?
1340                                         // Get width or height on the element
1341                                         (this.length ? jQuery.css( this[0], type ) : null) :
1342
1343                                         // Set the width or height on the element (default to pixels if value is unitless)
1344                                         this.css( type, size.constructor == String ? size : size + "px" );
1345         };
1346 });