src/core.js

   1 /*
   2  * jQuery @VERSION - New Wave Javascript
   3  *
   4  * Copyright (c) 2008 John Resig (jquery.com)
   5  * Dual licensed under the MIT (MIT-LICENSE.txt)
   6  * and GPL (GPL-LICENSE.txt) licenses.
   7  *
   8  * $Date$
   9  * $Rev$
  10  */
  11
  12 // Map over jQuery in case of overwrite
  13 var _jQuery = window.jQuery,
  14 // Map over the $ in case of overwrite
  15         _$ = window.$;
  16
  17 var jQuery = window.jQuery = window.$ = function( selector, context ) {
  18         // The jQuery object is actually just the init constructor 'enhanced'
  19         return new jQuery.fn.init( selector, context );
  20 };
  21
  22 // A simple way to check for HTML strings or ID strings
  23 // (both of which we optimize for)
  24 var quickExpr = /^[^<]*(<(.|\s)+>)[^>]*$|^#([\w-]+)$/,
  25
  26 // Is it a simple selector
  27         isSimple = /^.[^:#\[\.]*$/,
  28
  29 // Will speed up references to undefined, and allows munging its name.
  30         undefined;
  31
  32 jQuery.fn = jQuery.prototype = {
  33         init: function( selector, context ) {
  34                 // Make sure that a selection was provided
  35                 selector = selector || document;
  36
  37                 // Handle $(DOMElement)
  38                 if ( selector.nodeType ) {
  39                         this[0] = selector;
  40                         this.length = 1;
  41                         this.context = selector;
  42                         return this;
  43                 }
  44                 // Handle HTML strings
  45                 if ( typeof selector === "string" ) {
  46                         // Are we dealing with HTML string or an ID?
  47                         var match = quickExpr.exec( selector );
  48
  49                         // Verify a match, and that no context was specified for #id
  50                         if ( match && (match[1] || !context) ) {
  51
  52                                 // HANDLE: $(html) -> $(array)
  53                                 if ( match[1] )
  54                                         selector = jQuery.clean( [ match[1] ], context );
  55
  56                                 // HANDLE: $("#id")
  57                                 else {
  58                                         var elem = document.getElementById( match[3] );
  59
  60                                         // Make sure an element was located
  61                                         if ( elem ){
  62                                                 // Handle the case where IE and Opera return items
  63                                                 // by name instead of ID
  64                                                 if ( elem.id != match[3] )
  65                                                         return jQuery().find( selector );
  66
  67                                                 // Otherwise, we inject the element directly into the jQuery object
  68                                                 var ret = jQuery( elem );
  69                                                 ret.context = document;
  70                                                 ret.selector = selector;
  71                                                 return ret;
  72                                         }
  73                                         selector = [];
  74                                 }
  75
  76                         // HANDLE: $(expr, [context])
  77                         // (which is just equivalent to: $(content).find(expr)
  78                         } else
  79                                 return jQuery( context ).find( selector );
  80
  81                 // HANDLE: $(function)
  82                 // Shortcut for document ready
  83                 } else if ( jQuery.isFunction( selector ) )
  84                         return jQuery( document )[ jQuery.fn.ready ? "ready" : "load" ]( selector );
  85
  86                 return this.setArray(jQuery.makeArray(selector));
  87         },
  88
  89         // Start with an empty selector
  90         selector: "",
  91
  92         // The current version of jQuery being used
  93         jquery: "@VERSION",
  94
  95         // The number of elements contained in the matched element set
  96         size: function() {
  97                 return this.length;
  98         },
  99
 100         // Get the Nth element in the matched element set OR
 101         // Get the whole matched element set as a clean array
 102         get: function( num ) {
 103                 return num === undefined ?
 104
 105                         // Return a 'clean' array
 106                         jQuery.makeArray( this ) :
 107
 108                         // Return just the object
 109                         this[ num ];
 110         },
 111
 112         // Take an array of elements and push it onto the stack
 113         // (returning the new matched element set)
 114         pushStack: function( elems, name, selector ) {
 115                 // Build a new jQuery matched element set
 116                 var ret = jQuery( elems );
 117
 118                 // Add the old object onto the stack (as a reference)
 119                 ret.prevObject = this;
 120
 121                 ret.context = this.context;
 122
 123                 if ( name === "find" )
 124                         ret.selector = this.selector + (this.selector ? " " : "") + selector;
 125                 else if ( name )
 126                         ret.selector = this.selector + "." + name + "(" + selector + ")";
 127
 128                 // Return the newly-formed element set
 129                 return ret;
 130         },
 131
 132         // Force the current matched set of elements to become
 133         // the specified array of elements (destroying the stack in the process)
 134         // You should use pushStack() in order to do this, but maintain the stack
 135         setArray: function( elems ) {
 136                 // Resetting the length to 0, then using the native Array push
 137                 // is a super-fast way to populate an object with array-like properties
 138                 this.length = 0;
 139                 Array.prototype.push.apply( this, elems );
 140
 141                 return this;
 142         },
 143
 144         // Execute a callback for every element in the matched set.
 145         // (You can seed the arguments with an array of args, but this is
 146         // only used internally.)
 147         each: function( callback, args ) {
 148                 return jQuery.each( this, callback, args );
 149         },
 150
 151         // Determine the position of an element within
 152         // the matched set of elements
 153         index: function( elem ) {
 154                 var ret = -1;
 155
 156                 // Locate the position of the desired element
 157                 return jQuery.inArray(
 158                         // If it receives a jQuery object, the first element is used
 159                         elem && elem.jquery ? elem[0] : elem
 160                 , this );
 161         },
 162
 163         attr: function( name, value, type ) {
 164                 var options = name;
 165
 166                 // Look for the case where we're accessing a style value
 167                 if ( typeof name === "string" )
 168                         if ( value === undefined )
 169                                 return this[0] && jQuery[ type || "attr" ]( this[0], name );
 170
 171                         else {
 172                                 options = {};
 173                                 options[ name ] = value;
 174                         }
 175
 176                 // Check to see if we're setting style values
 177                 return this.each(function(i){
 178                         // Set all the styles
 179                         for ( name in options )
 180                                 jQuery.attr(
 181                                         type ?
 182                                                 this.style :
 183                                                 this,
 184                                         name, jQuery.prop( this, options[ name ], type, i, name )
 185                                 );
 186                 });
 187         },
 188
 189         css: function( key, value ) {
 190                 // ignore negative width and height values
 191                 if ( (key == 'width' || key == 'height') && parseFloat(value) < 0 )
 192                         value = undefined;
 193                 return this.attr( key, value, "curCSS" );
 194         },
 195
 196         text: function( text ) {
 197                 if ( typeof text !== "object" && text != null )
 198                         return this.empty().append( (this[0] && this[0].ownerDocument || document).createTextNode( text ) );
 199
 200                 var ret = "";
 201
 202                 jQuery.each( text || this, function(){
 203                         jQuery.each( this.childNodes, function(){
 204                                 if ( this.nodeType != 8 )
 205                                         ret += this.nodeType != 1 ?
 206                                                 this.nodeValue :
 207                                                 jQuery.fn.text( [ this ] );
 208                         });
 209                 });
 210
 211                 return ret;
 212         },
 213
 214         wrapAll: function( html ) {
 215                 if ( this[0] )
 216                         // The elements to wrap the target around
 217                         jQuery( html, this[0].ownerDocument )
 218                                 .clone()
 219                                 .insertBefore( this[0] )
 220                                 .map(function(){
 221                                         var elem = this;
 222
 223                                         while ( elem.firstChild )
 224                                                 elem = elem.firstChild;
 225
 226                                         return elem;
 227                                 })
 228                                 .append(this);
 229
 230                 return this;
 231         },
 232
 233         wrapInner: function( html ) {
 234                 return this.each(function(){
 235                         jQuery( this ).contents().wrapAll( html );
 236                 });
 237         },
 238
 239         wrap: function( html ) {
 240                 return this.each(function(){
 241                         jQuery( this ).wrapAll( html );
 242                 });
 243         },
 244
 245         append: function() {
 246                 return this.domManip(arguments, true, function(elem){
 247                         if (this.nodeType == 1)
 248                                 this.appendChild( elem );
 249                 });
 250         },
 251
 252         prepend: function() {
 253                 return this.domManip(arguments, true, function(elem){
 254                         if (this.nodeType == 1)
 255                                 this.insertBefore( elem, this.firstChild );
 256                 });
 257         },
 258
 259         before: function() {
 260                 return this.domManip(arguments, false, function(elem){
 261                         this.parentNode.insertBefore( elem, this );
 262                 });
 263         },
 264
 265         after: function() {
 266                 return this.domManip(arguments, false, function(elem){
 267                         this.parentNode.insertBefore( elem, this.nextSibling );
 268                 });
 269         },
 270
 271         end: function() {
 272                 return this.prevObject || jQuery( [] );
 273         },
 274
 275         find: function( selector ) {
 276                 var elems = jQuery.map(this, function(elem){
 277                         return jQuery.find( selector, elem );
 278                 });
 279
 280                 return this.pushStack( /[^+>] [^+>]/.test( selector ) ?
 281                         jQuery.unique( elems ) :
 282                         elems, "find", selector );
 283         },
 284
 285         clone: function( events ) {
 286                 // Do the clone
 287                 var ret = this.map(function(){
 288                         if ( !jQuery.support.noCloneEvent && !jQuery.isXMLDoc(this) ) {
 289                                 // IE copies events bound via attachEvent when
 290                                 // using cloneNode. Calling detachEvent on the
 291                                 // clone will also remove the events from the orignal
 292                                 // In order to get around this, we use innerHTML.
 293                                 // Unfortunately, this means some modifications to
 294                                 // attributes in IE that are actually only stored
 295                                 // as properties will not be copied (such as the
 296                                 // the name attribute on an input).
 297                                 var clone = this.cloneNode(true),
 298                                         container = document.createElement("div");
 299                                 container.appendChild(clone);
 300                                 return jQuery.clean([container.innerHTML])[0];
 301                         } else
 302                                 return this.cloneNode(true);
 303                 });
 304
 305                 // Need to set the expando to null on the cloned set if it exists
 306                 // removeData doesn't work here, IE removes it from the original as well
 307                 // this is primarily for IE but the data expando shouldn't be copied over in any browser
 308                 var clone = ret.find("*").andSelf().each(function(){
 309                         if ( this[ expando ] !== undefined )
 310                                 this[ expando ] = null;
 311                 });
 312
 313                 // Copy the events from the original to the clone
 314                 if ( events === true )
 315                         this.find("*").andSelf().each(function(i){
 316                                 if (this.nodeType == 3)
 317                                         return;
 318                                 var events = jQuery.data( this, "events" );
 319
 320                                 for ( var type in events )
 321                                         for ( var handler in events[ type ] )
 322                                                 jQuery.event.add( clone[ i ], type, events[ type ][ handler ], events[ type ][ handler ].data );
 323                         });
 324
 325                 // Return the cloned set
 326                 return ret;
 327         },
 328
 329         filter: function( selector ) {
 330                 return this.pushStack(
 331                         jQuery.isFunction( selector ) &&
 332                         jQuery.grep(this, function(elem, i){
 333                                 return selector.call( elem, i );
 334                         }) ||
 335
 336                         jQuery.multiFilter( selector, jQuery.grep(this, function(elem){
 337                                 return elem.nodeType === 1;
 338                         }) ), "filter", selector );
 339         },
 340
 341         closest: function( selector ) {
 342                 return this.map(function(){
 343                         var cur = this;
 344                         while ( cur && cur.ownerDocument ) {
 345                                 if ( jQuery(cur).is(selector) )
 346                                         return cur;
 347                                 cur = cur.parentNode;
 348                         }
 349                 });
 350         },
 351
 352         not: function( selector ) {
 353                 if ( typeof selector === "string" )
 354                         // test special case where just one selector is passed in
 355                         if ( isSimple.test( selector ) )
 356                                 return this.pushStack( jQuery.multiFilter( selector, this, true ), "not", selector );
 357                         else
 358                                 selector = jQuery.multiFilter( selector, this );
 359
 360                 var isArrayLike = selector.length && selector[selector.length - 1] !== undefined && !selector.nodeType;
 361                 return this.filter(function() {
 362                         return isArrayLike ? jQuery.inArray( this, selector ) < 0 : this != selector;
 363                 });
 364         },
 365
 366         add: function( selector ) {
 367                 return this.pushStack( jQuery.unique( jQuery.merge(
 368                         this.get(),
 369                         typeof selector === "string" ?
 370                                 jQuery( selector ) :
 371                                 jQuery.makeArray( selector )
 372                 )));
 373         },
 374
 375         is: function( selector ) {
 376                 return !!selector && jQuery.multiFilter( selector, this ).length > 0;
 377         },
 378
 379         hasClass: function( selector ) {
 380                 return !!selector && this.is( "." + selector );
 381         },
 382
 383         val: function( value ) {
 384                 if ( value === undefined ) {
 385                         var elem = this[0];
 386
 387                         if ( elem ) {
 388                                 if( jQuery.nodeName( elem, 'option' ) )
 389                                         return (elem.attributes.value || {}).specified ? elem.value : elem.text;
 390
 391                                 // We need to handle select boxes special
 392                                 if ( jQuery.nodeName( elem, "select" ) ) {
 393                                         var index = elem.selectedIndex,
 394                                                 values = [],
 395                                                 options = elem.options,
 396                                                 one = elem.type == "select-one";
 397
 398                                         // Nothing was selected
 399                                         if ( index < 0 )
 400                                                 return null;
 401
 402                                         // Loop through all the selected options
 403                                         for ( var i = one ? index : 0, max = one ? index + 1 : options.length; i < max; i++ ) {
 404                                                 var option = options[ i ];
 405
 406                                                 if ( option.selected ) {
 407                                                         // Get the specifc value for the option
 408                                                         value = jQuery(option).val();
 409
 410                                                         // We don't need an array for one selects
 411                                                         if ( one )
 412                                                                 return value;
 413
 414                                                         // Multi-Selects return an array
 415                                                         values.push( value );
 416                                                 }
 417                                         }
 418
 419                                         return values;
 420                                 }
 421
 422                                 // Everything else, we just grab the value
 423                                 return (elem.value || "").replace(/\r/g, "");
 424
 425                         }
 426
 427                         return undefined;
 428                 }
 429
 430                 if ( typeof value === "number" )
 431                         value += '';
 432
 433                 return this.each(function(){
 434                         if ( this.nodeType != 1 )
 435                                 return;
 436
 437                         if ( jQuery.isArray(value) && /radio|checkbox/.test( this.type ) )
 438                                 this.checked = (jQuery.inArray(this.value, value) >= 0 ||
 439                                         jQuery.inArray(this.name, value) >= 0);
 440
 441                         else if ( jQuery.nodeName( this, "select" ) ) {
 442                                 var values = jQuery.makeArray(value);
 443
 444                                 jQuery( "option", this ).each(function(){
 445                                         this.selected = (jQuery.inArray( this.value, values ) >= 0 ||
 446                                                 jQuery.inArray( this.text, values ) >= 0);
 447                                 });
 448
 449                                 if ( !values.length )
 450                                         this.selectedIndex = -1;
 451
 452                         } else
 453                                 this.value = value;
 454                 });
 455         },
 456
 457         html: function( value ) {
 458                 return value === undefined ?
 459                         (this[0] ?
 460                                 this[0].innerHTML :
 461                                 null) :
 462                         this.empty().append( value );
 463         },
 464
 465         replaceWith: function( value ) {
 466                 return this.after( value ).remove();
 467         },
 468
 469         eq: function( i ) {
 470                 return this.slice( i, +i + 1 );
 471         },
 472
 473         slice: function() {
 474                 return this.pushStack( Array.prototype.slice.apply( this, arguments ),
 475                         "slice", Array.prototype.slice.call(arguments).join(",") );
 476         },
 477
 478         map: function( callback ) {
 479                 return this.pushStack( jQuery.map(this, function(elem, i){
 480                         return callback.call( elem, i, elem );
 481                 }));
 482         },
 483
 484         andSelf: function() {
 485                 return this.add( this.prevObject );
 486         },
 487
 488         data: function( key, value ){
 489                 var parts = key.split(".");
 490                 parts[1] = parts[1] ? "." + parts[1] : "";
 491
 492                 if ( value === undefined ) {
 493                         var data = this.triggerHandler("getData" + parts[1] + "!", [parts[0]]);
 494
 495                         if ( data === undefined && this.length )
 496                                 data = jQuery.data( this[0], key );
 497
 498                         return data == null && parts[1] ?
 499                                 this.data( parts[0] ) :
 500                                 data;
 501                 } else
 502                         return this.trigger("setData" + parts[1] + "!", [parts[0], value]).each(function(){
 503                                 jQuery.data( this, key, value );
 504                         });
 505         },
 506
 507         removeData: function( key ){
 508                 return this.each(function(){
 509                         jQuery.removeData( this, key );
 510                 });
 511         },
 512
 513         domManip: function( args, table, callback ) {
 514                 if ( this[0] ) {
 515                         var fragment = this[0].ownerDocument.createDocumentFragment(),
 516                                 scripts = jQuery.clean( args, this[0].ownerDocument, fragment ),
 517                                 first = fragment.firstChild,
 518                                 extra = this.length > 1 ? fragment.cloneNode(true) : fragment;
 519
 520                         if ( first )
 521                                 for ( var i = 0, l = this.length; i < l; i++ )
 522                                         callback.call( root(this[i], first), i > 0 ? extra.cloneNode(true) : fragment );
 523
 524                         if ( scripts )
 525                                 jQuery.each( scripts, evalScript );
 526                 }
 527
 528                 return this;
 529
 530                 function root( elem, cur ) {
 531                         return table && jQuery.nodeName(elem, "table") && jQuery.nodeName(cur, "tr") ?
 532                                 (elem.getElementsByTagName("tbody")[0] ||
 533                                 elem.appendChild(elem.ownerDocument.createElement("tbody"))) :
 534                                 elem;
 535                 }
 536         }
 537 };
 538
 539 // Give the init function the jQuery prototype for later instantiation
 540 jQuery.fn.init.prototype = jQuery.fn;
 541
 542 function evalScript( i, elem ) {
 543         if ( elem.src )
 544                 jQuery.ajax({
 545                         url: elem.src,
 546                         async: false,
 547                         dataType: "script"
 548                 });
 549
 550         else
 551                 jQuery.globalEval( elem.text || elem.textContent || elem.innerHTML || "" );
 552
 553         if ( elem.parentNode )
 554                 elem.parentNode.removeChild( elem );
 555 }
 556
 557 function now(){
 558         return +new Date;
 559 }
 560
 561 jQuery.extend = jQuery.fn.extend = function() {
 562         // copy reference to target object
 563         var target = arguments[0] || {}, i = 1, length = arguments.length, deep = false, options;
 564
 565         // Handle a deep copy situation
 566         if ( typeof target === "boolean" ) {
 567                 deep = target;
 568                 target = arguments[1] || {};
 569                 // skip the boolean and the target
 570                 i = 2;
 571         }
 572
 573         // Handle case when target is a string or something (possible in deep copy)
 574         if ( typeof target !== "object" && !jQuery.isFunction(target) )
 575                 target = {};
 576
 577         // extend jQuery itself if only one argument is passed
 578         if ( length == i ) {
 579                 target = this;
 580                 --i;
 581         }
 582
 583         for ( ; i < length; i++ )
 584                 // Only deal with non-null/undefined values
 585                 if ( (options = arguments[ i ]) != null )
 586                         // Extend the base object
 587                         for ( var name in options ) {
 588                                 var src = target[ name ], copy = options[ name ];
 589
 590                                 // Prevent never-ending loop
 591                                 if ( target === copy )
 592                                         continue;
 593
 594                                 // Recurse if we're merging object values
 595                                 if ( deep && copy && typeof copy === "object" && !copy.nodeType )
 596                                         target[ name ] = jQuery.extend( deep,
 597                                                 // Never move original objects, clone them
 598                                                 src || ( copy.length != null ? [ ] : { } )
 599                                         , copy );
 600
 601                                 // Don't bring in undefined values
 602                                 else if ( copy !== undefined )
 603                                         target[ name ] = copy;
 604
 605                         }
 606
 607         // Return the modified object
 608         return target;
 609 };
 610
 611 var expando = "jQuery" + now(), uuid = 0, windowData = {},
 612         // exclude the following css properties to add px
 613         exclude = /z-?index|font-?weight|opacity|zoom|line-?height/i,
 614         // cache defaultView
 615         defaultView = document.defaultView || {},
 616         toString = Object.prototype.toString;
 617
 618 jQuery.extend({
 619         noConflict: function( deep ) {
 620                 window.$ = _$;
 621
 622                 if ( deep )
 623                         window.jQuery = _jQuery;
 624
 625                 return jQuery;
 626         },
 627
 628         // See test/unit/core.js for details concerning isFunction.
 629         // Since version 1.3, DOM methods and functions like alert
 630         // aren't supported. They return false on IE (#2968).
 631         isFunction: function( obj ) {
 632                 return toString.call(obj) === "[object Function]";
 633         },
 634
 635         isArray: function( obj ) {
 636                 return toString.call(obj) === "[object Array]";
 637         },
 638
 639         // check if an element is in a (or is an) XML document
 640         isXMLDoc: function( elem ) {
 641                 return elem.documentElement && !elem.body ||
 642                         elem.tagName && elem.ownerDocument && !elem.ownerDocument.body;
 643         },
 644
 645         // Evalulates a script in a global context
 646         globalEval: function( data ) {
 647                 data = jQuery.trim( data );
 648
 649                 if ( data ) {
 650                         // Inspired by code by Andrea Giammarchi
 651                         // http://webreflection.blogspot.com/2007/08/global-scope-evaluation-and-dom.html
 652                         var head = document.getElementsByTagName("head")[0] || document.documentElement,
 653                                 script = document.createElement("script");
 654
 655                         script.type = "text/javascript";
 656                         if ( jQuery.support.scriptEval )
 657                                 script.appendChild( document.createTextNode( data ) );
 658                         else
 659                                 script.text = data;
 660
 661                         // Use insertBefore instead of appendChild  to circumvent an IE6 bug.
 662                         // This arises when a base node is used (#2709).
 663                         head.insertBefore( script, head.firstChild );
 664                         head.removeChild( script );
 665                 }
 666         },
 667
 668         nodeName: function( elem, name ) {
 669                 return elem.nodeName && elem.nodeName.toUpperCase() == name.toUpperCase();
 670         },
 671
 672         cache: {},
 673
 674         data: function( elem, name, data ) {
 675                 elem = elem == window ?
 676                         windowData :
 677                         elem;
 678
 679                 var id = elem[ expando ];
 680
 681                 // Compute a unique ID for the element
 682                 if ( !id )
 683                         id = elem[ expando ] = ++uuid;
 684
 685                 // Only generate the data cache if we're
 686                 // trying to access or manipulate it
 687                 if ( name && !jQuery.cache[ id ] )
 688                         jQuery.cache[ id ] = {};
 689
 690                 // Prevent overriding the named cache with undefined values
 691                 if ( data !== undefined )
 692                         jQuery.cache[ id ][ name ] = data;
 693
 694                 // Return the named cache data, or the ID for the element
 695                 return name ?
 696                         jQuery.cache[ id ][ name ] || null :
 697                         id;
 698         },
 699
 700         removeData: function( elem, name ) {
 701                 elem = elem == window ?
 702                         windowData :
 703                         elem;
 704
 705                 var id = elem[ expando ];
 706
 707                 // If we want to remove a specific section of the element's data
 708                 if ( name ) {
 709                         if ( jQuery.cache[ id ] ) {
 710                                 // Remove the section of cache data
 711                                 delete jQuery.cache[ id ][ name ];
 712
 713                                 // If we've removed all the data, remove the element's cache
 714                                 name = "";
 715
 716                                 for ( name in jQuery.cache[ id ] )
 717                                         break;
 718
 719                                 if ( !name )
 720                                         jQuery.removeData( elem );
 721                         }
 722
 723                 // Otherwise, we want to remove all of the element's data
 724                 } else {
 725                         // Clean up the element expando
 726                         try {
 727                                 delete elem[ expando ];
 728                         } catch(e){
 729                                 // IE has trouble directly removing the expando
 730                                 // but it's ok with using removeAttribute
 731                                 if ( elem.removeAttribute )
 732                                         elem.removeAttribute( expando );
 733                         }
 734
 735                         // Completely remove the data cache
 736                         delete jQuery.cache[ id ];
 737                 }
 738         },
 739
 740         // args is for internal usage only
 741         each: function( object, callback, args ) {
 742                 var name, i = 0, length = object.length;
 743
 744                 if ( args ) {
 745                         if ( length === undefined ) {
 746                                 for ( name in object )
 747                                         if ( callback.apply( object[ name ], args ) === false )
 748                                                 break;
 749                         } else
 750                                 for ( ; i < length; )
 751                                         if ( callback.apply( object[ i++ ], args ) === false )
 752                                                 break;
 753
 754                 // A special, fast, case for the most common use of each
 755                 } else {
 756                         if ( length === undefined ) {
 757                                 for ( name in object )
 758                                         if ( callback.call( object[ name ], name, object[ name ] ) === false )
 759                                                 break;
 760                         } else
 761                                 for ( var value = object[0];
 762                                         i < length && callback.call( value, i, value ) !== false; value = object[++i] ){}
 763                 }
 764
 765                 return object;
 766         },
 767
 768         prop: function( elem, value, type, i, name ) {
 769                 // Handle executable functions
 770                 if ( jQuery.isFunction( value ) )
 771                         value = value.call( elem, i );
 772
 773                 // Handle passing in a number to a CSS property
 774                 return typeof value === "number" && type == "curCSS" && !exclude.test( name ) ?
 775                         value + "px" :
 776                         value;
 777         },
 778
 779         className: {
 780                 // internal only, use addClass("class")
 781                 add: function( elem, classNames ) {
 782                         jQuery.each((classNames || "").split(/\s+/), function(i, className){
 783                                 if ( elem.nodeType == 1 && !jQuery.className.has( elem.className, className ) )
 784                                         elem.className += (elem.className ? " " : "") + className;
 785                         });
 786                 },
 787
 788                 // internal only, use removeClass("class")
 789                 remove: function( elem, classNames ) {
 790                         if (elem.nodeType == 1)
 791                                 elem.className = classNames !== undefined ?
 792                                         jQuery.grep(elem.className.split(/\s+/), function(className){
 793                                                 return !jQuery.className.has( classNames, className );
 794                                         }).join(" ") :
 795                                         "";
 796                 },
 797
 798                 // internal only, use hasClass("class")
 799                 has: function( elem, className ) {
 800                         return jQuery.inArray( className, (elem.className || elem).toString().split(/\s+/) ) > -1;
 801                 }
 802         },
 803
 804         // A method for quickly swapping in/out CSS properties to get correct calculations
 805         swap: function( elem, options, callback ) {
 806                 var old = {};
 807                 // Remember the old values, and insert the new ones
 808                 for ( var name in options ) {
 809                         old[ name ] = elem.style[ name ];
 810                         elem.style[ name ] = options[ name ];
 811                 }
 812
 813                 callback.call( elem );
 814
 815                 // Revert the old values
 816                 for ( var name in options )
 817                         elem.style[ name ] = old[ name ];
 818         },
 819
 820         css: function( elem, name, force ) {
 821                 if ( name == "width" || name == "height" ) {
 822                         var val, props = { position: "absolute", visibility: "hidden", display:"block" }, which = name == "width" ? [ "Left", "Right" ] : [ "Top", "Bottom" ];
 823
 824                         function getWH() {
 825                                 val = name == "width" ? elem.offsetWidth : elem.offsetHeight;
 826                                 var padding = 0, border = 0;
 827                                 jQuery.each( which, function() {
 828                                         padding += parseFloat(jQuery.curCSS( elem, "padding" + this, true)) || 0;
 829                                         border += parseFloat(jQuery.curCSS( elem, "border" + this + "Width", true)) || 0;
 830                                 });
 831                                 val -= Math.round(padding + border);
 832                         }
 833
 834                         if ( jQuery(elem).is(":visible") )
 835                                 getWH();
 836                         else
 837                                 jQuery.swap( elem, props, getWH );
 838
 839                         return Math.max(0, val);
 840                 }
 841
 842                 return jQuery.curCSS( elem, name, force );
 843         },
 844
 845         curCSS: function( elem, name, force ) {
 846                 var ret, style = elem.style;
 847
 848                 // We need to handle opacity special in IE
 849                 if ( name == "opacity" && !jQuery.support.opacity ) {
 850                         ret = jQuery.attr( style, "opacity" );
 851
 852                         return ret == "" ?
 853                                 "1" :
 854                                 ret;
 855                 }
 856
 857                 // Make sure we're using the right name for getting the float value
 858                 if ( name.match( /float/i ) )
 859                         name = styleFloat;
 860
 861                 if ( !force && style && style[ name ] )
 862                         ret = style[ name ];
 863
 864                 else if ( defaultView.getComputedStyle ) {
 865
 866                         // Only "float" is needed here
 867                         if ( name.match( /float/i ) )
 868                                 name = "float";
 869
 870                         name = name.replace( /([A-Z])/g, "-$1" ).toLowerCase();
 871
 872                         var computedStyle = defaultView.getComputedStyle( elem, null );
 873
 874                         if ( computedStyle )
 875                                 ret = computedStyle.getPropertyValue( name );
 876
 877                         // We should always get a number back from opacity
 878                         if ( name == "opacity" && ret == "" )
 879                                 ret = "1";
 880
 881                 } else if ( elem.currentStyle ) {
 882                         var camelCase = name.replace(/\-(\w)/g, function(all, letter){
 883                                 return letter.toUpperCase();
 884                         });
 885
 886                         ret = elem.currentStyle[ name ] || elem.currentStyle[ camelCase ];
 887
 888                         // From the awesome hack by Dean Edwards
 889                         // http://erik.eae.net/archives/2007/07/27/18.54.15/#comment-102291
 890
 891                         // If we're not dealing with a regular pixel number
 892                         // but a number that has a weird ending, we need to convert it to pixels
 893                         if ( !/^\d+(px)?$/i.test( ret ) && /^\d/.test( ret ) ) {
 894                                 // Remember the original values
 895                                 var left = style.left, rsLeft = elem.runtimeStyle.left;
 896
 897                                 // Put in the new values to get a computed value out
 898                                 elem.runtimeStyle.left = elem.currentStyle.left;
 899                                 style.left = ret || 0;
 900                                 ret = style.pixelLeft + "px";
 901
 902                                 // Revert the changed values
 903                                 style.left = left;
 904                                 elem.runtimeStyle.left = rsLeft;
 905                         }
 906                 }
 907
 908                 return ret;
 909         },
 910
 911         clean: function( elems, context, fragment ) {
 912                 var ret = [], scripts = [];
 913                 context = context || document;
 914
 915                 // !context.createElement fails in IE with an error but returns typeof 'object'
 916                 if ( typeof context.createElement === "undefined" )
 917                         context = context.ownerDocument || context[0] && context[0].ownerDocument || document;
 918
 919                 jQuery.each(elems, function(i, elem){
 920                         if ( typeof elem === "number" )
 921                                 elem += '';
 922
 923                         if ( !elem )
 924                                 return;
 925
 926                         // Convert html string into DOM nodes
 927                         if ( typeof elem === "string" ) {
 928                                 // Fix "XHTML"-style tags in all browsers
 929                                 elem = elem.replace(/(<(\w+)[^>]*?)\/>/g, function(all, front, tag){
 930                                         return tag.match(/^(abbr|br|col|img|input|link|meta|param|hr|area|embed)$/i) ?
 931                                                 all :
 932                                                 front + "></" + tag + ">";
 933                                 });
 934
 935                                 // Trim whitespace, otherwise indexOf won't work as expected
 936                                 var tags = jQuery.trim( elem ).toLowerCase(), div = context.createElement("div");
 937
 938                                 var wrap =
 939                                         // option or optgroup
 940                                         !tags.indexOf("<opt") &&
 941                                         [ 1, "<select multiple='multiple'>", "</select>" ] ||
 942
 943                                         !tags.indexOf("<leg") &&
 944                                         [ 1, "<fieldset>", "</fieldset>" ] ||
 945
 946                                         tags.match(/^<(thead|tbody|tfoot|colg|cap)/) &&
 947                                         [ 1, "<table>", "</table>" ] ||
 948
 949                                         !tags.indexOf("<tr") &&
 950                                         [ 2, "<table><tbody>", "</tbody></table>" ] ||
 951
 952                                         // <thead> matched above
 953                                         (!tags.indexOf("<td") || !tags.indexOf("<th")) &&
 954                                         [ 3, "<table><tbody><tr>", "</tr></tbody></table>" ] ||
 955
 956                                         !tags.indexOf("<col") &&
 957                                         [ 2, "<table><tbody></tbody><colgroup>", "</colgroup></table>" ] ||
 958
 959                                         // IE can't serialize <link> and <script> tags normally
 960                                         !jQuery.support.htmlSerialize &&
 961                                         [ 1, "div<div>", "</div>" ] ||
 962
 963                                         [ 0, "", "" ];
 964
 965                                 // Go to html and back, then peel off extra wrappers
 966                                 div.innerHTML = wrap[1] + elem + wrap[2];
 967
 968                                 // Move to the right depth
 969                                 while ( wrap[0]-- )
 970                                         div = div.lastChild;
 971
 972                                 // Remove IE's autoinserted <tbody> from table fragments
 973                                 if ( !jQuery.support.tbody ) {
 974
 975                                         // String was a <table>, *may* have spurious <tbody>
 976                                         var tbody = !tags.indexOf("<table") && tags.indexOf("<tbody") < 0 ?
 977                                                 div.firstChild && div.firstChild.childNodes :
 978
 979                                                 // String was a bare <thead> or <tfoot>
 980                                                 wrap[1] == "<table>" && tags.indexOf("<tbody") < 0 ?
 981                                                         div.childNodes :
 982                                                         [];
 983
 984                                         for ( var j = tbody.length - 1; j >= 0 ; --j )
 985                                                 if ( jQuery.nodeName( tbody[ j ], "tbody" ) && !tbody[ j ].childNodes.length )
 986                                                         tbody[ j ].parentNode.removeChild( tbody[ j ] );
 987
 988                                         }
 989
 990                                 // IE completely kills leading whitespace when innerHTML is used
 991                                 if ( !jQuery.support.leadingWhitespace && /^\s/.test( elem ) )
 992                                         div.insertBefore( context.createTextNode( elem.match(/^\s*/)[0] ), div.firstChild );
 993
 994                                 if ( fragment ) {
 995                                         var found = div.getElementsByTagName("script");
 996
 997                                         while ( found.length ) {
 998                                                 scripts.push( found[0] );
 999                                                 found[0].parentNode.removeChild( found[0] );
1000                                         }
1001                                 }
1002
1003                                 elem = jQuery.makeArray( div.childNodes );
1004                         }
1005
1006                         if ( elem.nodeType )
1007                                 ret.push( elem );
1008                         else
1009                                 ret = jQuery.merge( ret, elem );
1010
1011                 });
1012
1013                 if ( fragment ) {
1014                         for ( var i = 0; ret[i]; i++ ) {
1015                                 if ( jQuery.nodeName( ret[i], "script" ) ) {
1016                                         ret[i].parentNode.removeChild( ret[i] );
1017                                 } else {
1018                                         if ( ret[i].nodeType === 1 )
1019                                                 ret = jQuery.merge( ret, ret[i].getElementsByTagName("script"));
1020                                         fragment.appendChild( ret[i] );
1021                                 }
1022                         }
1023
1024                         return scripts;
1025                 }
1026
1027                 return ret;
1028         },
1029
1030         attr: function( elem, name, value ) {
1031                 // don't set attributes on text and comment nodes
1032                 if (!elem || elem.nodeType == 3 || elem.nodeType == 8)
1033                         return undefined;
1034
1035                 var notxml = !jQuery.isXMLDoc( elem ),
1036                         // Whether we are setting (or getting)
1037                         set = value !== undefined;
1038
1039                 // Try to normalize/fix the name
1040                 name = notxml && jQuery.props[ name ] || name;
1041
1042                 // Only do all the following if this is a node (faster for style)
1043                 // IE elem.getAttribute passes even for style
1044                 if ( elem.tagName ) {
1045
1046                         // These attributes require special treatment
1047                         var special = /href|src|style/.test( name );
1048
1049                         // Safari mis-reports the default selected property of a hidden option
1050                         // Accessing the parent's selectedIndex property fixes it
1051                         if ( name == "selected" )
1052                                 elem.parentNode.selectedIndex;
1053
1054                         // If applicable, access the attribute via the DOM 0 way
1055                         if ( name in elem && notxml && !special ) {
1056                                 if ( set ){
1057                                         // We can't allow the type property to be changed (since it causes problems in IE)
1058                                         if ( name == "type" && jQuery.nodeName( elem, "input" ) && elem.parentNode )
1059                                                 throw "type property can't be changed";
1060
1061                                         elem[ name ] = value;
1062                                 }
1063
1064                                 // browsers index elements by id/name on forms, give priority to attributes.
1065                                 if( jQuery.nodeName( elem, "form" ) && elem.getAttributeNode(name) )
1066                                         return elem.getAttributeNode( name ).nodeValue;
1067
1068                                 return elem[ name ];
1069                         }
1070
1071                         if ( !jQuery.support.style && notxml &&  name == "style" )
1072                                 return jQuery.attr( elem.style, "cssText", value );
1073
1074                         if ( set )
1075                                 // convert the value to a string (all browsers do this but IE) see #1070
1076                                 elem.setAttribute( name, "" + value );
1077
1078                         var attr = !jQuery.support.hrefNormalized && notxml && special
1079                                         // Some attributes require a special call on IE
1080                                         ? elem.getAttribute( name, 2 )
1081                                         : elem.getAttribute( name );
1082
1083                         // Non-existent attributes return null, we normalize to undefined
1084                         return attr === null ? undefined : attr;
1085                 }
1086
1087                 // elem is actually elem.style ... set the style
1088
1089                 // IE uses filters for opacity
1090                 if ( !jQuery.support.opacity && name == "opacity" ) {
1091                         if ( set ) {
1092                                 // IE has trouble with opacity if it does not have layout
1093                                 // Force it by setting the zoom level
1094                                 elem.zoom = 1;
1095
1096                                 // Set the alpha filter to set the opacity
1097                                 elem.filter = (elem.filter || "").replace( /alpha\([^)]*\)/, "" ) +
1098                                         (parseInt( value ) + '' == "NaN" ? "" : "alpha(opacity=" + value * 100 + ")");
1099                         }
1100
1101                         return elem.filter && elem.filter.indexOf("opacity=") >= 0 ?
1102                                 (parseFloat( elem.filter.match(/opacity=([^)]*)/)[1] ) / 100) + '':
1103                                 "";
1104                 }
1105
1106                 name = name.replace(/-([a-z])/ig, function(all, letter){
1107                         return letter.toUpperCase();
1108                 });
1109
1110                 if ( set )
1111                         elem[ name ] = value;
1112
1113                 return elem[ name ];
1114         },
1115
1116         trim: function( text ) {
1117                 return (text || "").replace( /^\s+|\s+$/g, "" );
1118         },
1119
1120         makeArray: function( array ) {
1121                 var ret = [];
1122
1123                 if( array != null ){
1124                         var i = array.length;
1125                         // The window, strings (and functions) also have 'length'
1126                         if( i == null || typeof array === "string" || jQuery.isFunction(array) || array.setInterval )
1127                                 ret[0] = array;
1128                         else
1129                                 while( i )
1130                                         ret[--i] = array[i];
1131                 }
1132
1133                 return ret;
1134         },
1135
1136         inArray: function( elem, array ) {
1137                 for ( var i = 0, length = array.length; i < length; i++ )
1138                 // Use === because on IE, window == document
1139                         if ( array[ i ] === elem )
1140                                 return i;
1141
1142                 return -1;
1143         },
1144
1145         merge: function( first, second ) {
1146                 // We have to loop this way because IE & Opera overwrite the length
1147                 // expando of getElementsByTagName
1148                 var i = 0, elem, pos = first.length;
1149                 // Also, we need to make sure that the correct elements are being returned
1150                 // (IE returns comment nodes in a '*' query)
1151                 if ( !jQuery.support.getAll ) {
1152                         while ( (elem = second[ i++ ]) )
1153                                 if ( elem.nodeType != 8 )
1154                                         first[ pos++ ] = elem;
1155
1156                 } else
1157                         while ( (elem = second[ i++ ]) )
1158                                 first[ pos++ ] = elem;
1159
1160                 return first;
1161         },
1162
1163         unique: function( array ) {
1164                 var ret = [], done = {};
1165
1166                 try {
1167
1168                         for ( var i = 0, length = array.length; i < length; i++ ) {
1169                                 var id = jQuery.data( array[ i ] );
1170
1171                                 if ( !done[ id ] ) {
1172                                         done[ id ] = true;
1173                                         ret.push( array[ i ] );
1174                                 }
1175                         }
1176
1177                 } catch( e ) {
1178                         ret = array;
1179                 }
1180
1181                 return ret;
1182         },
1183
1184         grep: function( elems, callback, inv ) {
1185                 var ret = [];
1186
1187                 // Go through the array, only saving the items
1188                 // that pass the validator function
1189                 for ( var i = 0, length = elems.length; i < length; i++ )
1190                         if ( !inv != !callback( elems[ i ], i ) )
1191                                 ret.push( elems[ i ] );
1192
1193                 return ret;
1194         },
1195
1196         map: function( elems, callback ) {
1197                 var ret = [];
1198
1199                 // Go through the array, translating each of the items to their
1200                 // new value (or values).
1201                 for ( var i = 0, length = elems.length; i < length; i++ ) {
1202                         var value = callback( elems[ i ], i );
1203
1204                         if ( value != null )
1205                                 ret[ ret.length ] = value;
1206                 }
1207
1208                 return ret.concat.apply( [], ret );
1209         }
1210 });
1211
1212 // Use of jQuery.browser is deprecated.
1213 // It's included for backwards compatibility and plugins,
1214 // although they should work to migrate away.
1215
1216 var userAgent = navigator.userAgent.toLowerCase();
1217
1218 // Figure out what browser is being used
1219 jQuery.browser = {
1220         version: (userAgent.match( /.+(?:rv|it|ra|ie)[\/: ]([\d.]+)/ ) || [0,'0'])[1],
1221         safari: /webkit/.test( userAgent ),
1222         opera: /opera/.test( userAgent ),
1223         msie: /msie/.test( userAgent ) && !/opera/.test( userAgent ),
1224         mozilla: /mozilla/.test( userAgent ) && !/(compatible|webkit)/.test( userAgent )
1225 };
1226
1227 // Check to see if the W3C box model is being used
1228 jQuery.boxModel = !jQuery.browser.msie || document.compatMode == "CSS1Compat";
1229
1230 jQuery.each({
1231         parent: function(elem){return elem.parentNode;},
1232         parents: function(elem){return jQuery.dir(elem,"parentNode");},
1233         next: function(elem){return jQuery.nth(elem,2,"nextSibling");},
1234         prev: function(elem){return jQuery.nth(elem,2,"previousSibling");},
1235         nextAll: function(elem){return jQuery.dir(elem,"nextSibling");},
1236         prevAll: function(elem){return jQuery.dir(elem,"previousSibling");},
1237         siblings: function(elem){return jQuery.sibling(elem.parentNode.firstChild,elem);},
1238         children: function(elem){return jQuery.sibling(elem.firstChild);},
1239         contents: function(elem){return jQuery.nodeName(elem,"iframe")?elem.contentDocument||elem.contentWindow.document:jQuery.makeArray(elem.childNodes);}
1240 }, function(name, fn){
1241         jQuery.fn[ name ] = function( selector ) {
1242                 var ret = jQuery.map( this, fn );
1243
1244                 if ( selector && typeof selector == "string" )
1245                         ret = jQuery.multiFilter( selector, ret );
1246
1247                 return this.pushStack( jQuery.unique( ret ), name, selector );
1248         };
1249 });
1250
1251 jQuery.each({
1252         appendTo: "append",
1253         prependTo: "prepend",
1254         insertBefore: "before",
1255         insertAfter: "after",
1256         replaceAll: "replaceWith"
1257 }, function(name, original){
1258         jQuery.fn[ name ] = function() {
1259                 var args = arguments;
1260
1261                 return this.each(function(){
1262                         for ( var i = 0, length = args.length; i < length; i++ )
1263                                 jQuery( args[ i ] )[ original ]( this );
1264                 });
1265         };
1266 });
1267
1268 jQuery.each({
1269         removeAttr: function( name ) {
1270                 jQuery.attr( this, name, "" );
1271                 if (this.nodeType == 1)
1272                         this.removeAttribute( name );
1273         },
1274
1275         addClass: function( classNames ) {
1276                 jQuery.className.add( this, classNames );
1277         },
1278
1279         removeClass: function( classNames ) {
1280                 jQuery.className.remove( this, classNames );
1281         },
1282
1283         toggleClass: function( classNames ) {
1284                 jQuery.className[ jQuery.className.has( this, classNames ) ? "remove" : "add" ]( this, classNames );
1285         },
1286
1287         remove: function( selector ) {
1288                 if ( !selector || jQuery.filter( selector, [ this ] ).length ) {
1289                         // Prevent memory leaks
1290                         jQuery( "*", this ).add([this]).each(function(){
1291                                 jQuery.event.remove(this);
1292                                 jQuery.removeData(this);
1293                         });
1294                         if (this.parentNode)
1295                                 this.parentNode.removeChild( this );
1296                 }
1297         },
1298
1299         empty: function() {
1300                 // Remove element nodes and prevent memory leaks
1301                 jQuery( ">*", this ).remove();
1302
1303                 // Remove any remaining nodes
1304                 while ( this.firstChild )
1305                         this.removeChild( this.firstChild );
1306         }
1307 }, function(name, fn){
1308         jQuery.fn[ name ] = function(){
1309                 return this.each( fn, arguments );
1310         };
1311 });
1312
1313 // Helper function used by the dimensions and offset modules
1314 function num(elem, prop) {
1315         return elem[0] && parseInt( jQuery.curCSS(elem[0], prop, true), 10 ) || 0;
1316 }