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