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 $(DOMElement)
  40                 if ( selector.nodeType ) {
  41                         this[0] = selector;
  42                         this.length = 1;
  43                         return this;
  44
  45                 // Handle HTML strings
  46                 } else if ( typeof selector == "string" ) {
  47                         // Are we dealing with HTML string or an ID?
  48                         var match = quickExpr.exec( selector );
  49
  50                         // Verify a match, and that no context was specified for #id
  51                         if ( match && (match[1] || !context) ) {
  52
  53                                 // HANDLE: $(html) -> $(array)
  54                                 if ( match[1] )
  55                                         selector = jQuery.clean( [ match[1] ], context );
  56
  57                                 // HANDLE: $("#id")
  58                                 else {
  59                                         var elem = document.getElementById( match[3] );
  60
  61                                         // Make sure an element was located
  62                                         if ( elem )
  63                                                 // Handle the case where IE and Opera return items
  64                                                 // by name instead of ID
  65                                                 if ( elem.id != match[3] )
  66                                                         return jQuery().find( selector );
  67
  68                                                 // Otherwise, we inject the element directly into the jQuery object
  69                                                 else {
  70                                                         this[0] = elem;
  71                                                         this.length = 1;
  72                                                         return this;
  73                                                 }
  74
  75                                         else
  76                                                 selector = [];
  77                                 }
  78
  79                         // HANDLE: $(expr, [context])
  80                         // (which is just equivalent to: $(content).find(expr)
  81                         } else
  82                                 return new jQuery( context ).find( selector );
  83
  84                 // HANDLE: $(function)
  85                 // Shortcut for document ready
  86                 } else if ( jQuery.isFunction( selector ) )
  87                         return new jQuery( document )[ jQuery.fn.ready ? "ready" : "load" ]( selector );
  88
  89                 return this.setArray(
  90                         // HANDLE: $(array)
  91                         selector.constructor == Array && selector ||
  92
  93                         // HANDLE: $(arraylike)
  94                         // Watch for when an array-like object, contains DOM nodes, is passed in as the selector
  95                         (selector.jquery || selector.length && selector != window && !selector.nodeType && selector[0] != undefined && selector[0].nodeType) && jQuery.makeArray( selector ) ||
  96
  97                         // HANDLE: $(*)
  98                         [ selector ] );
  99         },
 100
 101         // The current version of jQuery being used
 102         jquery: "@VERSION",
 103
 104         // The number of elements contained in the matched element set
 105         size: function() {
 106                 return this.length;
 107         },
 108
 109         // The number of elements contained in the matched element set
 110         length: 0,
 111
 112         // Get the Nth element in the matched element set OR
 113         // Get the whole matched element set as a clean array
 114         get: function( num ) {
 115                 return num == undefined ?
 116
 117                         // Return a 'clean' array
 118                         jQuery.makeArray( this ) :
 119
 120                         // Return just the object
 121                         this[ num ];
 122         },
 123
 124         // Take an array of elements and push it onto the stack
 125         // (returning the new matched element set)
 126         pushStack: function( elems ) {
 127                 // Build a new jQuery matched element set
 128                 var ret = jQuery( elems );
 129
 130                 // Add the old object onto the stack (as a reference)
 131                 ret.prevObject = this;
 132
 133                 // Return the newly-formed element set
 134                 return ret;
 135         },
 136
 137         // Force the current matched set of elements to become
 138         // the specified array of elements (destroying the stack in the process)
 139         // You should use pushStack() in order to do this, but maintain the stack
 140         setArray: function( elems ) {
 141                 // Resetting the length to 0, then using the native Array push
 142                 // is a super-fast way to populate an object with array-like properties
 143                 this.length = 0;
 144                 Array.prototype.push.apply( this, elems );
 145
 146                 return this;
 147         },
 148
 149         // Execute a callback for every element in the matched set.
 150         // (You can seed the arguments with an array of args, but this is
 151         // only used internally.)
 152         each: function( callback, args ) {
 153                 return jQuery.each( this, callback, args );
 154         },
 155
 156         // Determine the position of an element within
 157         // the matched set of elements
 158         index: function( elem ) {
 159                 var ret = -1;
 160
 161                 // Locate the position of the desired element
 162                 this.each(function(i){
 163                         if ( this == elem )
 164                                 ret = i;
 165                 });
 166
 167                 return ret;
 168         },
 169
 170         attr: function( name, value, type ) {
 171                 var options = name;
 172
 173                 // Look for the case where we're accessing a style value
 174                 if ( name.constructor == String )
 175                         if ( value == undefined )
 176                                 return this.length && jQuery[ type || "attr" ]( this[0], name ) || undefined;
 177
 178                         else {
 179                                 options = {};
 180                                 options[ name ] = value;
 181                         }
 182
 183                 // Check to see if we're setting style values
 184                 return this.each(function(i){
 185                         // Set all the styles
 186                         for ( name in options )
 187                                 jQuery.attr(
 188                                         type ?
 189                                                 this.style :
 190                                                 this,
 191                                         name, jQuery.prop( this, options[ name ], type, i, name )
 192                                 );
 193                 });
 194         },
 195
 196         css: function( key, value ) {
 197                 // ignore negative width and height values
 198                 if ( (key == 'width' || key == 'height') && parseFloat(value) < 0 )
 199                         value = undefined;
 200                 return this.attr( key, value, "curCSS" );
 201         },
 202
 203         text: function( text ) {
 204                 if ( typeof text != "object" && text != null )
 205                         return this.empty().append( (this[0] && this[0].ownerDocument || document).createTextNode( text ) );
 206
 207                 var ret = "";
 208
 209                 jQuery.each( text || this, function(){
 210                         jQuery.each( this.childNodes, function(){
 211                                 if ( this.nodeType != 8 )
 212                                         ret += this.nodeType != 1 ?
 213                                                 this.nodeValue :
 214                                                 jQuery.fn.text( [ this ] );
 215                         });
 216                 });
 217
 218                 return ret;
 219         },
 220
 221         wrapAll: function( html ) {
 222                 if ( this[0] )
 223                         // The elements to wrap the target around
 224                         jQuery( html, this[0].ownerDocument )
 225                                 .clone()
 226                                 .insertBefore( this[0] )
 227                                 .map(function(){
 228                                         var elem = this;
 229
 230                                         while ( elem.firstChild )
 231                                                 elem = elem.firstChild;
 232
 233                                         return elem;
 234                                 })
 235                                 .append(this);
 236
 237                 return this;
 238         },
 239
 240         wrapInner: function( html ) {
 241                 return this.each(function(){
 242                         jQuery( this ).contents().wrapAll( html );
 243                 });
 244         },
 245
 246         wrap: function( html ) {
 247                 return this.each(function(){
 248                         jQuery( this ).wrapAll( html );
 249                 });
 250         },
 251
 252         append: function() {
 253                 return this.domManip(arguments, true, false, function(elem){
 254                         if (this.nodeType == 1)
 255                                 this.appendChild( elem );
 256                 });
 257         },
 258
 259         prepend: function() {
 260                 return this.domManip(arguments, true, true, function(elem){
 261                         if (this.nodeType == 1)
 262                                 this.insertBefore( elem, this.firstChild );
 263                 });
 264         },
 265
 266         before: function() {
 267                 return this.domManip(arguments, false, false, function(elem){
 268                         this.parentNode.insertBefore( elem, this );
 269                 });
 270         },
 271
 272         after: function() {
 273                 return this.domManip(arguments, false, true, function(elem){
 274                         this.parentNode.insertBefore( elem, this.nextSibling );
 275                 });
 276         },
 277
 278         end: function() {
 279                 return this.prevObject || jQuery( [] );
 280         },
 281
 282         find: function( selector ) {
 283                 var elems = jQuery.map(this, function(elem){
 284                         return jQuery.find( selector, elem );
 285                 });
 286
 287                 return this.pushStack( /[^+>] [^+>]/.test( selector ) || selector.indexOf("..") > -1 ?
 288                         jQuery.unique( elems ) :
 289                         elems );
 290         },
 291
 292         clone: function( events ) {
 293                 // Do the clone
 294                 var ret = this.map(function(){
 295                         if ( jQuery.browser.msie ) {
 296                                 // IE copies events bound via attachEvent when
 297                                 // using cloneNode. Calling detachEvent on the
 298                                 // clone will also remove the events from the orignal
 299                                 // In order to get around this, we use innerHTML.
 300                                 // Unfortunately, this means some modifications to
 301                                 // attributes in IE that are actually only stored
 302                                 // as properties will not be copied (such as the
 303                                 // the name attribute on an input).
 304                                 var clone = this.cloneNode(true),
 305                                         container = document.createElement("div"),
 306                                         container2 = document.createElement("div");
 307                                 container.appendChild(clone);
 308                                 container2.innerHTML = container.innerHTML;
 309                                 return container2.firstChild;
 310                         } else
 311                                 return this.cloneNode(true);
 312                 });
 313
 314                 // Need to set the expando to null on the cloned set if it exists
 315                 // removeData doesn't work here, IE removes it from the original as well
 316                 // this is primarily for IE but the data expando shouldn't be copied over in any browser
 317                 var clone = ret.find("*").andSelf().each(function(){
 318                         if ( this[ expando ] != undefined )
 319                                 this[ expando ] = null;
 320                 });
 321
 322                 // Copy the events from the original to the clone
 323                 if ( events === true )
 324                         this.find("*").andSelf().each(function(i){
 325                                 var events = jQuery.data( this, "events" );
 326
 327                                 for ( var type in events )
 328                                         for ( var handler in events[ type ] )
 329                                                 jQuery.event.add( clone[ i ], type, events[ type ][ handler ], events[ type ][ handler ].data );
 330                         });
 331
 332                 // Return the cloned set
 333                 return ret;
 334         },
 335
 336         filter: function( selector ) {
 337                 return this.pushStack(
 338                         jQuery.isFunction( selector ) &&
 339                         jQuery.grep(this, function(elem, i){
 340                                 return selector.call( elem, i );
 341                         }) ||
 342
 343                         jQuery.multiFilter( selector, this ) );
 344         },
 345
 346         not: function( selector ) {
 347                 return this.pushStack(
 348                         selector.constructor == String &&
 349                         jQuery.multiFilter( selector, this, true ) ||
 350
 351                         jQuery.grep(this, function(elem) {
 352                                 return selector.constructor == Array || selector.jquery ?
 353                                         jQuery.inArray( elem, selector ) < 0 :
 354                                         elem != selector;
 355                         }) );
 356         },
 357
 358         add: function( selector ) {
 359                 return !selector ? this : this.pushStack( jQuery.merge(
 360                         this.get(),
 361                         selector.constructor == String ?
 362                                 jQuery( selector ).get() :
 363                                 selector.length != undefined && (!selector.nodeName || jQuery.nodeName(selector, "form")) ?
 364                                         selector : [selector] ) );
 365         },
 366
 367         is: function( selector ) {
 368                 return selector ?
 369                         jQuery.multiFilter( selector, this ).length > 0 :
 370                         false;
 371         },
 372
 373         hasClass: function( selector ) {
 374                 return this.is( "." + selector );
 375         },
 376
 377         val: function( value ) {
 378                 if ( value == undefined ) {
 379
 380                         if ( this.length ) {
 381                                 var elem = this[0];
 382
 383                                 // We need to handle select boxes special
 384                                 if ( jQuery.nodeName( elem, "select" ) ) {
 385                                         var index = elem.selectedIndex,
 386                                                 values = [],
 387                                                 options = elem.options,
 388                                                 one = elem.type == "select-one";
 389
 390                                         // Nothing was selected
 391                                         if ( index < 0 )
 392                                                 return null;
 393
 394                                         // Loop through all the selected options
 395                                         for ( var i = one ? index : 0, max = one ? index + 1 : options.length; i < max; i++ ) {
 396                                                 var option = options[ i ];
 397
 398                                                 if ( option.selected ) {
 399                                                         // Get the specifc value for the option
 400                                                         value = jQuery.browser.msie && !option.attributes.value.specified ? option.text : option.value;
 401
 402                                                         // We don't need an array for one selects
 403                                                         if ( one )
 404                                                                 return value;
 405
 406                                                         // Multi-Selects return an array
 407                                                         values.push( value );
 408                                                 }
 409                                         }
 410
 411                                         return values;
 412
 413                                 // Everything else, we just grab the value
 414                                 } else
 415                                         return (this[0].value || "").replace(/\r/g, "");
 416
 417                         }
 418
 419                 } else
 420                         return this.each(function(){
 421                                 if ( this.nodeType != 1 )
 422                                         return;
 423
 424                                 if ( value.constructor == Array && /radio|checkbox/.test( this.type ) )
 425                                         this.checked = (jQuery.inArray(this.value, value) >= 0 ||
 426                                                 jQuery.inArray(this.name, value) >= 0);
 427
 428                                 else if ( jQuery.nodeName( this, "select" ) ) {
 429                                         var values = value.constructor == Array ?
 430                                                 value :
 431                                                 [ value ];
 432
 433                                         jQuery( "option", this ).each(function(){
 434                                                 this.selected = (jQuery.inArray( this.value, values ) >= 0 ||
 435                                                         jQuery.inArray( this.text, values ) >= 0);
 436                                         });
 437
 438                                         if ( !values.length )
 439                                                 this.selectedIndex = -1;
 440
 441                                 } else
 442                                         this.value = value;
 443                         });
 444         },
 445
 446         html: function( value ) {
 447                 return value == undefined ?
 448                         (this.length ?
 449                                 this[0].innerHTML :
 450                                 null) :
 451                         this.empty().append( value );
 452         },
 453
 454         replaceWith: function( value ) {
 455                 return this.after( value ).remove();
 456         },
 457
 458         eq: function( i ) {
 459                 return this.slice( i, i + 1 );
 460         },
 461
 462         slice: function() {
 463                 return this.pushStack( Array.prototype.slice.apply( this, arguments ) );
 464         },
 465
 466         map: function( callback ) {
 467                 return this.pushStack( jQuery.map(this, function(elem, i){
 468                         return callback.call( elem, i, elem );
 469                 }));
 470         },
 471
 472         andSelf: function() {
 473                 return this.add( this.prevObject );
 474         },
 475
 476         domManip: function( args, table, reverse, callback ) {
 477                 var clone = this.length > 1, elems;
 478
 479                 return this.each(function(){
 480                         if ( !elems ) {
 481                                 elems = jQuery.clean( args, this.ownerDocument );
 482
 483                                 if ( reverse )
 484                                         elems.reverse();
 485                         }
 486
 487                         var obj = this;
 488
 489                         if ( table && jQuery.nodeName( this, "table" ) && jQuery.nodeName( elems[0], "tr" ) )
 490                                 obj = this.getElementsByTagName("tbody")[0] || this.appendChild( this.ownerDocument.createElement("tbody") );
 491
 492                         var scripts = jQuery( [] );
 493
 494                         jQuery.each(elems, function(){
 495                                 var elem = clone ?
 496                                         this.cloneNode( true ) :
 497                                         this;
 498
 499                                 if ( jQuery.nodeName( elem, "script" ) ) {
 500
 501                                         // If scripts are waiting to be executed, wait on this script as well
 502                                         if ( scripts.length )
 503                                                 scripts = scripts.add( elem );
 504
 505                                         // If nothing is waiting to be executed, run immediately
 506                                         else
 507                                                 evalScript( 0, elem );
 508
 509                                 } else {
 510                                         // Remove any inner scripts for later evaluation
 511                                         if ( elem.nodeType == 1 )
 512                                                 scripts = scripts.add( jQuery( "script", elem ).remove() );
 513
 514                                         // Inject the elements into the document
 515                                         callback.call( obj, elem );
 516                                 }
 517                         });
 518
 519                         scripts.each( evalScript );
 520                 });
 521         }
 522 };
 523
 524 function evalScript( i, elem ) {
 525         if ( elem.src )
 526                 jQuery.ajax({
 527                         url: elem.src,
 528                         async: false,
 529                         dataType: "script"
 530                 });
 531
 532         else
 533                 jQuery.globalEval( elem.text || elem.textContent || elem.innerHTML || "" );
 534
 535         if ( elem.parentNode )
 536                 elem.parentNode.removeChild( elem );
 537 }
 538
 539 jQuery.extend = jQuery.fn.extend = function() {
 540         // copy reference to target object
 541         var target = arguments[0] || {}, i = 1, length = arguments.length, deep = false, options;
 542
 543         // Handle a deep copy situation
 544         if ( target.constructor == Boolean ) {
 545                 deep = target;
 546                 target = arguments[1] || {};
 547                 // skip the boolean and the target
 548                 i = 2;
 549         }
 550
 551         // Handle case when target is a string or something (possible in deep copy)
 552         if ( typeof target != "object" && typeof target != "function" )
 553                 target = {};
 554
 555         // extend jQuery itself if only one argument is passed
 556         if ( length == 1 ) {
 557                 target = this;
 558                 i = 0;
 559         }
 560
 561         for ( ; i < length; i++ )
 562                 // Only deal with non-null/undefined values
 563                 if ( (options = arguments[ i ]) != null )
 564                         // Extend the base object
 565                         for ( var name in options ) {
 566                                 // Prevent never-ending loop
 567                                 if ( target === options[ name ] )
 568                                         continue;
 569
 570                                 // Recurse if we're merging object values
 571                                 if ( deep && options[ name ] && typeof options[ name ] == "object" && target[ name ] && !options[ name ].nodeType )
 572                                         target[ name ] = jQuery.extend( target[ name ], options[ name ] );
 573
 574                                 // Don't bring in undefined values
 575                                 else if ( options[ name ] != undefined )
 576                                         target[ name ] = options[ name ];
 577
 578                         }
 579
 580         // Return the modified object
 581         return target;
 582 };
 583
 584 var expando = "jQuery" + (new Date()).getTime(), uuid = 0, windowData = {};
 585
 586 // exclude the following css properties to add px
 587 var exclude = /z-?index|font-?weight|opacity|zoom|line-?height/i;
 588
 589 jQuery.extend({
 590         noConflict: function( deep ) {
 591                 window.$ = _$;
 592
 593                 if ( deep )
 594                         window.jQuery = _jQuery;
 595
 596                 return jQuery;
 597         },
 598
 599         // This may seem like some crazy code, but trust me when I say that this
 600         // is the only cross-browser way to do this. --John
 601         isFunction: function( fn ) {
 602                 return !!fn && typeof fn != "string" && !fn.nodeName &&
 603                         fn.constructor != Array && /function/i.test( fn + "" );
 604         },
 605
 606         // check if an element is in a (or is an) XML document
 607         isXMLDoc: function( elem ) {
 608                 return elem.documentElement && !elem.body ||
 609                         elem.tagName && elem.ownerDocument && !elem.ownerDocument.body;
 610         },
 611
 612         // Evalulates a script in a global context
 613         globalEval: function( data ) {
 614                 data = jQuery.trim( data );
 615
 616                 if ( data ) {
 617                         // Inspired by code by Andrea Giammarchi
 618                         // http://webreflection.blogspot.com/2007/08/global-scope-evaluation-and-dom.html
 619                         var head = document.getElementsByTagName("head")[0] || document.documentElement,
 620                                 script = document.createElement("script");
 621
 622                         script.type = "text/javascript";
 623                         if ( jQuery.browser.msie )
 624                                 script.text = data;
 625                         else
 626                                 script.appendChild( document.createTextNode( data ) );
 627
 628                         head.appendChild( script );
 629                         head.removeChild( script );
 630                 }
 631         },
 632
 633         nodeName: function( elem, name ) {
 634                 return elem.nodeName && elem.nodeName.toUpperCase() == name.toUpperCase();
 635         },
 636
 637         cache: {},
 638
 639         data: function( elem, name, data ) {
 640                 elem = elem == window ?
 641                         windowData :
 642                         elem;
 643
 644                 var id = elem[ expando ];
 645
 646                 // Compute a unique ID for the element
 647                 if ( !id )
 648                         id = elem[ expando ] = ++uuid;
 649
 650                 // Only generate the data cache if we're
 651                 // trying to access or manipulate it
 652                 if ( name && !jQuery.cache[ id ] )
 653                         jQuery.cache[ id ] = {};
 654
 655                 // Prevent overriding the named cache with undefined values
 656                 if ( data != undefined )
 657                         jQuery.cache[ id ][ name ] = data;
 658
 659                 // Return the named cache data, or the ID for the element
 660                 return name ?
 661                         jQuery.cache[ id ][ name ] :
 662                         id;
 663         },
 664
 665         removeData: function( elem, name ) {
 666                 elem = elem == window ?
 667                         windowData :
 668                         elem;
 669
 670                 var id = elem[ expando ];
 671
 672                 // If we want to remove a specific section of the element's data
 673                 if ( name ) {
 674                         if ( jQuery.cache[ id ] ) {
 675                                 // Remove the section of cache data
 676                                 delete jQuery.cache[ id ][ name ];
 677
 678                                 // If we've removed all the data, remove the element's cache
 679                                 name = "";
 680
 681                                 for ( name in jQuery.cache[ id ] )
 682                                         break;
 683
 684                                 if ( !name )
 685                                         jQuery.removeData( elem );
 686                         }
 687
 688                 // Otherwise, we want to remove all of the element's data
 689                 } else {
 690                         // Clean up the element expando
 691                         try {
 692                                 delete elem[ expando ];
 693                         } catch(e){
 694                                 // IE has trouble directly removing the expando
 695                                 // but it's ok with using removeAttribute
 696                                 if ( elem.removeAttribute )
 697                                         elem.removeAttribute( expando );
 698                         }
 699
 700                         // Completely remove the data cache
 701                         delete jQuery.cache[ id ];
 702                 }
 703         },
 704
 705         // args is for internal usage only
 706         each: function( object, callback, args ) {
 707                 if ( args ) {
 708                         if ( object.length == undefined )
 709                                 for ( var name in object )
 710                                         callback.apply( object[ name ], args );
 711                         else
 712                                 for ( var i = 0, length = object.length; i < length; i++ )
 713                                         if ( callback.apply( object[ i ], args ) === false )
 714                                                 break;
 715
 716                 // A special, fast, case for the most common use of each
 717                 } else {
 718                         if ( object.length == undefined )
 719                                 for ( var name in object )
 720                                         callback.call( object[ name ], name, object[ name ] );
 721                         else
 722                                 for ( var i = 0, length = object.length, value = object[0];
 723                                         i < length && callback.call( value, i, value ) !== false; value = object[++i] ){}
 724                 }
 725
 726                 return object;
 727         },
 728
 729         prop: function( elem, value, type, i, name ) {
 730                         // Handle executable functions
 731                         if ( jQuery.isFunction( value ) )
 732                                 value = value.call( elem, i );
 733
 734                         // Handle passing in a number to a CSS property
 735                         return value && value.constructor == Number && type == "curCSS" && !exclude.test( name ) ?
 736                                 value + "px" :
 737                                 value;
 738         },
 739
 740         className: {
 741                 // internal only, use addClass("class")
 742                 add: function( elem, classNames ) {
 743                         jQuery.each((classNames || "").split(/\s+/), function(i, className){
 744                                 if ( elem.nodeType == 1 && !jQuery.className.has( elem.className, className ) )
 745                                         elem.className += (elem.className ? " " : "") + className;
 746                         });
 747                 },
 748
 749                 // internal only, use removeClass("class")
 750                 remove: function( elem, classNames ) {
 751                         if (elem.nodeType == 1)
 752                                 elem.className = classNames != undefined ?
 753                                         jQuery.grep(elem.className.split(/\s+/), function(className){
 754                                                 return !jQuery.className.has( classNames, className );
 755                                         }).join(" ") :
 756                                         "";
 757                 },
 758
 759                 // internal only, use is(".class")
 760                 has: function( elem, className ) {
 761                         return jQuery.inArray( className, (elem.className || elem).toString().split(/\s+/) ) > -1;
 762                 }
 763         },
 764
 765         // A method for quickly swapping in/out CSS properties to get correct calculations
 766         swap: function( elem, options, callback ) {
 767                 // Remember the old values, and insert the new ones
 768                 for ( var name in options ) {
 769                         elem.style[ "old" + name ] = elem.style[ name ];
 770                         elem.style[ name ] = options[ name ];
 771                 }
 772
 773                 callback.call( elem );
 774
 775                 // Revert the old values
 776                 for ( var name in options )
 777                         elem.style[ name ] = elem.style[ "old" + name ];
 778         },
 779
 780         css: function( elem, name, force ) {
 781                 if ( name == "height" || name == "width" ) {
 782                         var old = {}, height, width;
 783
 784                         // Revert the padding and border widths to get the
 785                         // correct height/width values
 786                         jQuery.each([ "Top", "Bottom", "Right", "Left" ], function(){
 787                                 old[ "padding" + this ] = 0;
 788                                 old[ "border" + this + "Width" ] = 0;
 789                         });
 790
 791                         // Swap out the padding/border values temporarily
 792                         jQuery.swap( elem, old, function() {
 793
 794                                 // If the element is visible, then the calculation is easy
 795                                 if ( jQuery( elem ).is(":visible") ) {
 796                                         height = elem.offsetHeight;
 797                                         width = elem.offsetWidth;
 798
 799                                 // Otherwise, we need to flip out more values
 800                                 } else {
 801                                         elem = jQuery( elem.cloneNode(true) )
 802                                                 .find(":radio").removeAttr("checked").removeAttr("defaultChecked").end()
 803                                                 .css({
 804                                                         visibility: "hidden",
 805                                                         position: "absolute",
 806                                                         display: "block",
 807                                                         right: "0",
 808                                                         left: "0"
 809                                                 }).appendTo( elem.parentNode )[0];
 810
 811                                         var position = jQuery.css( elem.parentNode, "position" ) || "static";
 812                                         if ( position == "static" )
 813                                                 elem.parentNode.style.position = "relative";
 814
 815                                         height = elem.clientHeight;
 816                                         width = elem.clientWidth;
 817
 818                                         if ( position == "static" )
 819                                                 elem.parentNode.style.position = "static";
 820
 821                                         elem.parentNode.removeChild( elem );
 822                                 }
 823                         });
 824
 825                         return name == "height" ?
 826                                 height :
 827                                 width;
 828                 }
 829
 830                 return jQuery.curCSS( elem, name, force );
 831         },
 832
 833         curCSS: function( elem, name, force ) {
 834                 var ret;
 835
 836                 // A helper method for determining if an element's values are broken
 837                 function color( elem ) {
 838                         if ( !jQuery.browser.safari )
 839                                 return false;
 840
 841                         var ret = document.defaultView.getComputedStyle( elem, null );
 842                         return !ret || ret.getPropertyValue("color") == "";
 843                 }
 844
 845                 // We need to handle opacity special in IE
 846                 if ( name == "opacity" && jQuery.browser.msie ) {
 847                         ret = jQuery.attr( elem.style, "opacity" );
 848
 849                         return ret == "" ?
 850                                 "1" :
 851                                 ret;
 852                 }
 853
 854                 // Make sure we're using the right name for getting the float value
 855                 if ( name.match( /float/i ) )
 856                         name = styleFloat;
 857
 858                 if ( !force && elem.style[ name ] )
 859                         ret = elem.style[ name ];
 860
 861                 else if ( document.defaultView && document.defaultView.getComputedStyle ) {
 862
 863                         // Only "float" is needed here
 864                         if ( name.match( /float/i ) )
 865                                 name = "float";
 866
 867                         name = name.replace( /([A-Z])/g, "-$1" ).toLowerCase();
 868
 869                         var getComputedStyle = document.defaultView.getComputedStyle( elem, null );
 870
 871                         if ( getComputedStyle && !color( elem ) )
 872                                 ret = getComputedStyle.getPropertyValue( name );
 873
 874                         // If the element isn't reporting its values properly in Safari
 875                         // then some display: none elements are involved
 876                         else {
 877                                 var swap = [], stack = [];
 878
 879                                 // Locate all of the parent display: none elements
 880                                 for ( var a = elem; a && color(a); a = a.parentNode )
 881                                         stack.unshift(a);
 882
 883                                 // Go through and make them visible, but in reverse
 884                                 // (It would be better if we knew the exact display type that they had)
 885                                 for ( var i = 0; i < stack.length; i++ )
 886                                         if ( color( stack[ i ] ) ) {
 887                                                 swap[ i ] = stack[ i ].style.display;
 888                                                 stack[ i ].style.display = "block";
 889                                         }
 890
 891                                 // Since we flip the display style, we have to handle that
 892                                 // one special, otherwise get the value
 893                                 ret = name == "display" && swap[ stack.length - 1 ] != null ?
 894                                         "none" :
 895                                         ( getComputedStyle && getComputedStyle.getPropertyValue( name ) ) || "";
 896
 897                                 // Finally, revert the display styles back
 898                                 for ( var i = 0; i < swap.length; i++ )
 899                                         if ( swap[ i ] != null )
 900                                                 stack[ i ].style.display = swap[ i ];
 901                         }
 902
 903                         // We should always get a number back from opacity
 904                         if ( name == "opacity" && ret == "" )
 905                                 ret = "1";
 906
 907                 } else if ( elem.currentStyle ) {
 908                         var camelCase = name.replace(/\-(\w)/g, function(all, letter){
 909                                 return letter.toUpperCase();
 910                         });
 911
 912                         ret = elem.currentStyle[ name ] || elem.currentStyle[ camelCase ];
 913
 914                         // From the awesome hack by Dean Edwards
 915                         // http://erik.eae.net/archives/2007/07/27/18.54.15/#comment-102291
 916
 917                         // If we're not dealing with a regular pixel number
 918                         // but a number that has a weird ending, we need to convert it to pixels
 919                         if ( !/^\d+(px)?$/i.test( ret ) && /^\d/.test( ret ) ) {
 920                                 // Remember the original values
 921                                 var style = elem.style.left, runtimeStyle = elem.runtimeStyle.left;
 922
 923                                 // Put in the new values to get a computed value out
 924                                 elem.runtimeStyle.left = elem.currentStyle.left;
 925                                 elem.style.left = ret || 0;
 926                                 ret = elem.style.pixelLeft + "px";
 927
 928                                 // Revert the changed values
 929                                 elem.style.left = style;
 930                                 elem.runtimeStyle.left = runtimeStyle;
 931                         }
 932                 }
 933
 934                 return ret;
 935         },
 936
 937         clean: function( elems, context ) {
 938                 var ret = [];
 939                 context = context || document;
 940                 // !context.createElement fails in IE with an error but returns typeof 'object'
 941                 if (typeof context.createElement == 'undefined')
 942                         context = context.ownerDocument || context[0] && context[0].ownerDocument || document;
 943
 944                 jQuery.each(elems, function(i, elem){
 945                         if ( !elem )
 946                                 return;
 947
 948                         if ( elem.constructor == Number )
 949                                 elem = elem.toString();
 950
 951                         // Convert html string into DOM nodes
 952                         if ( typeof elem == "string" ) {
 953                                 // Fix "XHTML"-style tags in all browsers
 954                                 elem = elem.replace(/(<(\w+)[^>]*?)\/>/g, function(all, front, tag){
 955                                         return tag.match(/^(abbr|br|col|img|input|link|meta|param|hr|area)$/i) ?
 956                                                 all :
 957                                                 front + "></" + tag + ">";
 958                                 });
 959
 960                                 // Trim whitespace, otherwise indexOf won't work as expected
 961                                 var tags = jQuery.trim( elem ).toLowerCase(), div = context.createElement("div");
 962
 963                                 var wrap =
 964                                         // option or optgroup
 965                                         !tags.indexOf("<opt") &&
 966                                         [ 1, "<select multiple='multiple'>", "</select>" ] ||
 967
 968                                         !tags.indexOf("<leg") &&
 969                                         [ 1, "<fieldset>", "</fieldset>" ] ||
 970
 971                                         tags.match(/^<(thead|tbody|tfoot|colg|cap)/) &&
 972                                         [ 1, "<table>", "</table>" ] ||
 973
 974                                         !tags.indexOf("<tr") &&
 975                                         [ 2, "<table><tbody>", "</tbody></table>" ] ||
 976
 977                                         // <thead> matched above
 978                                         (!tags.indexOf("<td") || !tags.indexOf("<th")) &&
 979                                         [ 3, "<table><tbody><tr>", "</tr></tbody></table>" ] ||
 980
 981                                         !tags.indexOf("<col") &&
 982                                         [ 2, "<table><tbody></tbody><colgroup>", "</colgroup></table>" ] ||
 983
 984                                         // IE can't serialize <link> and <script> tags normally
 985                                         jQuery.browser.msie &&
 986                                         [ 1, "div<div>", "</div>" ] ||
 987
 988                                         [ 0, "", "" ];
 989
 990                                 // Go to html and back, then peel off extra wrappers
 991                                 div.innerHTML = wrap[1] + elem + wrap[2];
 992
 993                                 // Move to the right depth
 994                                 while ( wrap[0]-- )
 995                                         div = div.lastChild;
 996
 997                                 // Remove IE's autoinserted <tbody> from table fragments
 998                                 if ( jQuery.browser.msie ) {
 999
1000                                         // String was a <table>, *may* have spurious <tbody>
1001                                         var tbody = !tags.indexOf("<table") && tags.indexOf("<tbody") < 0 ?
1002                                                 div.firstChild && div.firstChild.childNodes :
1003
1004                                                 // String was a bare <thead> or <tfoot>
1005                                                 wrap[1] == "<table>" && tags.indexOf("<tbody") < 0 ?
1006                                                         div.childNodes :
1007                                                         [];
1008
1009                                         for ( var i = tbody.length - 1; i >= 0 ; --i )
1010                                                 if ( jQuery.nodeName( tbody[ i ], "tbody" ) && !tbody[ i ].childNodes.length )
1011                                                         tbody[ i ].parentNode.removeChild( tbody[ i ] );
1012
1013                                         // IE completely kills leading whitespace when innerHTML is used
1014                                         if ( /^\s/.test( elem ) )
1015                                                 div.insertBefore( context.createTextNode( elem.match(/^\s*/)[0] ), div.firstChild );
1016
1017                                 }
1018
1019                                 elem = jQuery.makeArray( div.childNodes );
1020                         }
1021
1022                         if ( elem.length === 0 && (!jQuery.nodeName( elem, "form" ) && !jQuery.nodeName( elem, "select" )) )
1023                                 return;
1024
1025                         if ( elem[0] == undefined || jQuery.nodeName( elem, "form" ) || elem.options )
1026                                 ret.push( elem );
1027
1028                         else
1029                                 ret = jQuery.merge( ret, elem );
1030
1031                 });
1032
1033                 return ret;
1034         },
1035
1036         attr: function( elem, name, value ) {
1037                 // don't set attributes on text and comment nodes
1038                 if (!elem || elem.nodeType == 3 || elem.nodeType == 8)
1039                         return undefined;
1040
1041                 var fix = jQuery.isXMLDoc( elem ) ?
1042                         {} :
1043                         jQuery.props;
1044
1045                 // Safari mis-reports the default selected property of a hidden option
1046                 // Accessing the parent's selectedIndex property fixes it
1047                 if ( name == "selected" && jQuery.browser.safari )
1048                         elem.parentNode.selectedIndex;
1049
1050                 // Certain attributes only work when accessed via the old DOM 0 way
1051                 if ( fix[ name ] ) {
1052                         if ( value != undefined )
1053                                 elem[ fix[ name ] ] = value;
1054
1055                         return elem[ fix[ name ] ];
1056
1057                 } else if ( jQuery.browser.msie && name == "style" )
1058                         return jQuery.attr( elem.style, "cssText", value );
1059
1060                 else if ( value == undefined && jQuery.browser.msie && jQuery.nodeName( elem, "form" ) && (name == "action" || name == "method") )
1061                         return elem.getAttributeNode( name ).nodeValue;
1062
1063                 // IE elem.getAttribute passes even for style
1064                 else if ( elem.tagName ) {
1065
1066                         if ( value != undefined ) {
1067                                 // We can't allow the type property to be changed (since it causes problems in IE)
1068                                 if ( name == "type" && jQuery.nodeName( elem, "input" ) && elem.parentNode )
1069                                         throw "type property can't be changed";
1070
1071                                 // convert the value to a string (all browsers do this but IE) see #1070
1072                                 elem.setAttribute( name, "" + value );
1073                         }
1074
1075                         if ( jQuery.browser.msie && /href|src/.test( name ) && !jQuery.isXMLDoc( elem ) )
1076                                 return elem.getAttribute( name, 2 );
1077
1078                         return elem.getAttribute( name );
1079
1080                 // elem is actually elem.style ... set the style
1081                 } else {
1082                         // IE actually uses filters for opacity
1083                         if ( name == "opacity" && jQuery.browser.msie ) {
1084                                 if ( value != undefined ) {
1085                                         // IE has trouble with opacity if it does not have layout
1086                                         // Force it by setting the zoom level
1087                                         elem.zoom = 1;
1088
1089                                         // Set the alpha filter to set the opacity
1090                                         elem.filter = (elem.filter || "").replace( /alpha\([^)]*\)/, "" ) +
1091                                                 (parseFloat( value ).toString() == "NaN" ? "" : "alpha(opacity=" + value * 100 + ")");
1092                                 }
1093
1094                                 return elem.filter && elem.filter.indexOf("opacity=") >= 0 ?
1095                                         (parseFloat( elem.filter.match(/opacity=([^)]*)/)[1] ) / 100).toString() :
1096                                         "";
1097                         }
1098
1099                         name = name.replace(/-([a-z])/ig, function(all, letter){
1100                                 return letter.toUpperCase();
1101                         });
1102
1103                         if ( value != undefined )
1104                                 elem[ name ] = value;
1105
1106                         return elem[ name ];
1107                 }
1108         },
1109
1110         trim: function( text ) {
1111                 return (text || "").replace( /^\s+|\s+$/g, "" );
1112         },
1113
1114         makeArray: function( array ) {
1115                 var ret = [];
1116
1117                 // Need to use typeof to fight Safari childNodes crashes
1118                 if ( typeof array != "array" )
1119                         for ( var i = 0, length = array.length; i < length; i++ )
1120                                 ret.push( array[ i ] );
1121                 else
1122                         ret = array.slice( 0 );
1123
1124                 return ret;
1125         },
1126
1127         inArray: function( elem, array ) {
1128                 for ( var i = 0, length = array.length; i < length; i++ )
1129                         if ( array[ i ] == elem )
1130                                 return i;
1131
1132                 return -1;
1133         },
1134
1135         merge: function( first, second ) {
1136                 // We have to loop this way because IE & Opera overwrite the length
1137                 // expando of getElementsByTagName
1138
1139                 // Also, we need to make sure that the correct elements are being returned
1140                 // (IE returns comment nodes in a '*' query)
1141                 if ( jQuery.browser.msie ) {
1142                         for ( var i = 0; second[ i ]; i++ )
1143                                 if ( second[ i ].nodeType != 8 )
1144                                         first.push( second[ i ] );
1145
1146                 } else
1147                         for ( var i = 0; second[ i ]; i++ )
1148                                 first.push( second[ i ] );
1149
1150                 return first;
1151         },
1152
1153         unique: function( array ) {
1154                 var ret = [], done = {};
1155
1156                 try {
1157
1158                         for ( var i = 0, length = array.length; i < length; i++ ) {
1159                                 var id = jQuery.data( array[ i ] );
1160
1161                                 if ( !done[ id ] ) {
1162                                         done[ id ] = true;
1163                                         ret.push( array[ i ] );
1164                                 }
1165                         }
1166
1167                 } catch( e ) {
1168                         ret = array;
1169                 }
1170
1171                 return ret;
1172         },
1173
1174         grep: function( elems, callback, inv ) {
1175                 // If a string is passed in for the function, make a function
1176                 // for it (a handy shortcut)
1177                 if ( typeof callback == "string" )
1178                         callback = eval("false||function(a,i){return " + callback + "}");
1179
1180                 var ret = [];
1181
1182                 // Go through the array, only saving the items
1183                 // that pass the validator function
1184                 for ( var i = 0, length = elems.length; i < length; i++ )
1185                         if ( !inv && callback( elems[ i ], i ) || inv && !callback( elems[ i ], i ) )
1186                                 ret.push( elems[ i ] );
1187
1188                 return ret;
1189         },
1190
1191         map: function( elems, callback ) {
1192                 var ret = [];
1193
1194                 // Go through the array, translating each of the items to their
1195                 // new value (or values).
1196                 for ( var i = 0, length = elems.length; i < length; i++ ) {
1197                         var value = callback( elems[ i ], i );
1198
1199                         if ( value !== null && value != undefined ) {
1200                                 if ( value.constructor != Array )
1201                                         value = [ value ];
1202
1203                                 ret = ret.concat( value );
1204                         }
1205                 }
1206
1207                 return ret;
1208         }
1209 });
1210
1211 var userAgent = navigator.userAgent.toLowerCase();
1212
1213 // Figure out what browser is being used
1214 jQuery.browser = {
1215         version: (userAgent.match( /.+(?:rv|it|ra|ie)[\/: ]([\d.]+)/ ) || [])[1],
1216         safari: /webkit/.test( userAgent ),
1217         opera: /opera/.test( userAgent ),
1218         msie: /msie/.test( userAgent ) && !/opera/.test( userAgent ),
1219         mozilla: /mozilla/.test( userAgent ) && !/(compatible|webkit)/.test( userAgent )
1220 };
1221
1222 var styleFloat = jQuery.browser.msie ?
1223         "styleFloat" :
1224         "cssFloat";
1225
1226 jQuery.extend({
1227         // Check to see if the W3C box model is being used
1228         boxModel: !jQuery.browser.msie || document.compatMode == "CSS1Compat",
1229
1230         props: {
1231                 "for": "htmlFor",
1232                 "class": "className",
1233                 "float": styleFloat,
1234                 cssFloat: styleFloat,
1235                 styleFloat: styleFloat,
1236                 innerHTML: "innerHTML",
1237                 className: "className",
1238                 value: "value",
1239                 disabled: "disabled",
1240                 checked: "checked",
1241                 readonly: "readOnly",
1242                 selected: "selected",
1243                 maxlength: "maxLength",
1244                 selectedIndex: "selectedIndex",
1245                 defaultValue: "defaultValue",
1246                 tagName: "tagName",
1247                 nodeName: "nodeName"
1248         }
1249 });
1250
1251 jQuery.each({
1252         parent: "elem.parentNode",
1253         parents: "jQuery.dir(elem,'parentNode')",
1254         next: "jQuery.nth(elem,2,'nextSibling')",
1255         prev: "jQuery.nth(elem,2,'previousSibling')",
1256         nextAll: "jQuery.dir(elem,'nextSibling')",
1257         prevAll: "jQuery.dir(elem,'previousSibling')",
1258         siblings: "jQuery.sibling(elem.parentNode.firstChild,elem)",
1259         children: "jQuery.sibling(elem.firstChild)",
1260         contents: "jQuery.nodeName(elem,'iframe')?elem.contentDocument||elem.contentWindow.document:jQuery.makeArray(elem.childNodes)"
1261 }, function(name, fn){
1262         fn = eval("false||function(elem){return " + fn + "}");
1263
1264         jQuery.fn[ name ] = function( selector ) {
1265                 var ret = jQuery.map( this, fn );
1266
1267                 if ( selector && typeof selector == "string" )
1268                         ret = jQuery.multiFilter( selector, ret );
1269
1270                 return this.pushStack( jQuery.unique( ret ) );
1271         };
1272 });
1273
1274 jQuery.each({
1275         appendTo: "append",
1276         prependTo: "prepend",
1277         insertBefore: "before",
1278         insertAfter: "after",
1279         replaceAll: "replaceWith"
1280 }, function(name, original){
1281         jQuery.fn[ name ] = function() {
1282                 var args = arguments;
1283
1284                 return this.each(function(){
1285                         for ( var i = 0, length = args.length; i < length; i++ )
1286                                 jQuery( args[ i ] )[ original ]( this );
1287                 });
1288         };
1289 });
1290
1291 jQuery.each({
1292         removeAttr: function( name ) {
1293                 jQuery.attr( this, name, "" );
1294                 if (this.nodeType == 1)
1295                         this.removeAttribute( name );
1296         },
1297
1298         addClass: function( classNames ) {
1299                 jQuery.className.add( this, classNames );
1300         },
1301
1302         removeClass: function( classNames ) {
1303                 jQuery.className.remove( this, classNames );
1304         },
1305
1306         toggleClass: function( classNames ) {
1307                 jQuery.className[ jQuery.className.has( this, classNames ) ? "remove" : "add" ]( this, classNames );
1308         },
1309
1310         remove: function( selector ) {
1311                 if ( !selector || jQuery.filter( selector, [ this ] ).r.length ) {
1312                         // Prevent memory leaks
1313                         jQuery( "*", this ).add(this).each(function(){
1314                                 jQuery.event.remove(this);
1315                                 jQuery.removeData(this);
1316                         });
1317                         if (this.parentNode)
1318                                 this.parentNode.removeChild( this );
1319                 }
1320         },
1321
1322         empty: function() {
1323                 // Remove element nodes and prevent memory leaks
1324                 jQuery( ">*", this ).remove();
1325
1326                 // Remove any remaining nodes
1327                 while ( this.firstChild )
1328                         this.removeChild( this.firstChild );
1329         }
1330 }, function(name, fn){
1331         jQuery.fn[ name ] = function(){
1332                 return this.each( fn, arguments );
1333         };
1334 });
1335
1336 jQuery.each([ "Height", "Width" ], function(i, name){
1337         var type = name.toLowerCase();
1338
1339         jQuery.fn[ type ] = function( size ) {
1340                 // Get window width or height
1341                 return this[0] == window ?
1342                         // Opera reports document.body.client[Width/Height] properly in both quirks and standards
1343                         jQuery.browser.opera && document.body[ "client" + name ] ||
1344
1345                         // Safari reports inner[Width/Height] just fine (Mozilla and Opera include scroll bar widths)
1346                         jQuery.browser.safari && window[ "inner" + name ] ||
1347
1348                         // Everyone else use document.documentElement or document.body depending on Quirks vs Standards mode
1349                         document.compatMode == "CSS1Compat" && document.documentElement[ "client" + name ] || document.body[ "client" + name ] :
1350
1351                         // Get document width or height
1352                         this[0] == document ?
1353                                 // Either scroll[Width/Height] or offset[Width/Height], whichever is greater (Mozilla reports scrollWidth the same as offsetWidth)
1354                                 Math.max( document.body[ "scroll" + name ], document.body[ "offset" + name ] ) :
1355
1356                                 // Get or set width or height on the element
1357                                 size == undefined ?
1358                                         // Get width or height on the element
1359                                         (this.length ? jQuery.css( this[0], type ) : null) :
1360
1361                                         // Set the width or height on the element (default to pixels if value is unitless)
1362                                         this.css( type, size.constructor == String ? size : size + "px" );
1363         };
1364 });