src/core.js

   1 /*
   2  * jQuery @VERSION - New Wave Javascript
   3  *
   4  * Copyright (c) 2007 John Resig (jquery.com)
   5  * Dual licensed under the MIT (MIT-LICENSE.txt)
   6  * and GPL (GPL-LICENSE.txt) licenses.
   7  *
   8  * $Date$
   9  * $Rev$
  10  */
  11
  12 // Map over jQuery in case of overwrite
  13 if ( window.jQuery )
  14         var _jQuery = window.jQuery;
  15
  16 var jQuery = window.jQuery = function( selector, context ) {
  17         // The jQuery object is actually just the init constructor 'enhanced'
  18         return new jQuery.prototype.init( selector, context );
  19 };
  20
  21 // Map over the $ in case of overwrite
  22 if ( window.$ )
  23         var _$ = window.$;
  24
  25 // Map the jQuery namespace to the '$' one
  26 window.$ = jQuery;
  27
  28 // A simple way to check for HTML strings or ID strings
  29 // (both of which we optimize for)
  30 var quickExpr = /^[^<]*(<(.|\s)+>)[^>]*$|^#(\w+)$/;
  31
  32 // Is it a simple selector
  33 var isSimple = /^.[^:#\[\.]*$/;
  34
  35 jQuery.fn = jQuery.prototype = {
  36         init: function( selector, context ) {
  37                 // Make sure that a selection was provided
  38                 selector = selector || document;
  39
  40                 // Handle $(DOMElement)
  41                 if ( selector.nodeType ) {
  42                         this[0] = selector;
  43                         this.length = 1;
  44                         return this;
  45
  46                 // Handle HTML strings
  47                 } else if ( typeof selector == "string" ) {
  48                         // Are we dealing with HTML string or an ID?
  49                         var match = quickExpr.exec( selector );
  50
  51                         // Verify a match, and that no context was specified for #id
  52                         if ( match && (match[1] || !context) ) {
  53
  54                                 // HANDLE: $(html) -> $(array)
  55                                 if ( match[1] )
  56                                         selector = jQuery.clean( [ match[1] ], context );
  57
  58                                 // HANDLE: $("#id")
  59                                 else {
  60                                         var elem = document.getElementById( match[3] );
  61
  62                                         // Make sure an element was located
  63                                         if ( elem )
  64                                                 // Handle the case where IE and Opera return items
  65                                                 // by name instead of ID
  66                                                 if ( elem.id != match[3] )
  67                                                         return jQuery().find( selector );
  68
  69                                                 // Otherwise, we inject the element directly into the jQuery object
  70                                                 else {
  71                                                         this[0] = elem;
  72                                                         this.length = 1;
  73                                                         return this;
  74                                                 }
  75
  76                                         else
  77                                                 selector = [];
  78                                 }
  79
  80                         // HANDLE: $(expr, [context])
  81                         // (which is just equivalent to: $(content).find(expr)
  82                         } else
  83                                 return new jQuery( context ).find( selector );
  84
  85                 // HANDLE: $(function)
  86                 // Shortcut for document ready
  87                 } else if ( jQuery.isFunction( selector ) )
  88                         return new jQuery( document )[ jQuery.fn.ready ? "ready" : "load" ]( selector );
  89
  90                 return this.setArray(
  91                         // HANDLE: $(array)
  92                         selector.constructor == Array && selector ||
  93
  94                         // HANDLE: $(arraylike)
  95                         // Watch for when an array-like object, contains DOM nodes, is passed in as the selector
  96                         (selector.jquery || selector.length && selector != window && !selector.nodeType && selector[0] != undefined && selector[0].nodeType) && jQuery.makeArray( selector ) ||
  97
  98                         // HANDLE: $(*)
  99                         [ selector ] );
 100         },
 101
 102         // The current version of jQuery being used
 103         jquery: "@VERSION",
 104
 105         // The number of elements contained in the matched element set
 106         size: function() {
 107                 return this.length;
 108         },
 109
 110         // The number of elements contained in the matched element set
 111         length: 0,
 112
 113         // Get the Nth element in the matched element set OR
 114         // Get the whole matched element set as a clean array
 115         get: function( num ) {
 116                 return num == undefined ?
 117
 118                         // Return a 'clean' array
 119                         jQuery.makeArray( this ) :
 120
 121                         // Return just the object
 122                         this[ num ];
 123         },
 124
 125         // Take an array of elements and push it onto the stack
 126         // (returning the new matched element set)
 127         pushStack: function( elems ) {
 128                 // Build a new jQuery matched element set
 129                 var ret = jQuery( elems );
 130
 131                 // Add the old object onto the stack (as a reference)
 132                 ret.prevObject = this;
 133
 134                 // Return the newly-formed element set
 135                 return ret;
 136         },
 137
 138         // Force the current matched set of elements to become
 139         // the specified array of elements (destroying the stack in the process)
 140         // You should use pushStack() in order to do this, but maintain the stack
 141         setArray: function( elems ) {
 142                 // Resetting the length to 0, then using the native Array push
 143                 // is a super-fast way to populate an object with array-like properties
 144                 this.length = 0;
 145                 Array.prototype.push.apply( this, elems );
 146
 147                 return this;
 148         },
 149
 150         // Execute a callback for every element in the matched set.
 151         // (You can seed the arguments with an array of args, but this is
 152         // only used internally.)
 153         each: function( callback, args ) {
 154                 return jQuery.each( this, callback, args );
 155         },
 156
 157         // Determine the position of an element within
 158         // the matched set of elements
 159         index: function( elem ) {
 160                 var ret = -1;
 161
 162                 // Locate the position of the desired element
 163                 this.each(function(i){
 164                         if ( this == elem )
 165                                 ret = i;
 166                 });
 167
 168                 return ret;
 169         },
 170
 171         attr: function( name, value, type ) {
 172                 var options = name;
 173
 174                 // Look for the case where we're accessing a style value
 175                 if ( name.constructor == String )
 176                         if ( value == undefined )
 177                                 return this.length && jQuery[ type || "attr" ]( this[0], name ) || undefined;
 178
 179                         else {
 180                                 options = {};
 181                                 options[ name ] = value;
 182                         }
 183
 184                 // Check to see if we're setting style values
 185                 return this.each(function(i){
 186                         // Set all the styles
 187                         for ( name in options )
 188                                 jQuery.attr(
 189                                         type ?
 190                                                 this.style :
 191                                                 this,
 192                                         name, jQuery.prop( this, options[ name ], type, i, name )
 193                                 );
 194                 });
 195         },
 196
 197         css: function( key, value ) {
 198                 // ignore negative width and height values
 199                 if ( (key == 'width' || key == 'height') && parseFloat(value) < 0 )
 200                         value = undefined;
 201                 return this.attr( key, value, "curCSS" );
 202         },
 203
 204         text: function( text ) {
 205                 if ( typeof text != "object" && text != null )
 206                         return this.empty().append( (this[0] && this[0].ownerDocument || document).createTextNode( text ) );
 207
 208                 var ret = "";
 209
 210                 jQuery.each( text || this, function(){
 211                         jQuery.each( this.childNodes, function(){
 212                                 if ( this.nodeType != 8 )
 213                                         ret += this.nodeType != 1 ?
 214                                                 this.nodeValue :
 215                                                 jQuery.fn.text( [ this ] );
 216                         });
 217                 });
 218
 219                 return ret;
 220         },
 221
 222         wrapAll: function( html ) {
 223                 if ( this[0] )
 224                         // The elements to wrap the target around
 225                         jQuery( html, this[0].ownerDocument )
 226                                 .clone()
 227                                 .insertBefore( this[0] )
 228                                 .map(function(){
 229                                         var elem = this;
 230
 231                                         while ( elem.firstChild )
 232                                                 elem = elem.firstChild;
 233
 234                                         return elem;
 235                                 })
 236                                 .append(this);
 237
 238                 return this;
 239         },
 240
 241         wrapInner: function( html ) {
 242                 return this.each(function(){
 243                         jQuery( this ).contents().wrapAll( html );
 244                 });
 245         },
 246
 247         wrap: function( html ) {
 248                 return this.each(function(){
 249                         jQuery( this ).wrapAll( html );
 250                 });
 251         },
 252
 253         append: function() {
 254                 return this.domManip(arguments, true, false, function(elem){
 255                         if (this.nodeType == 1)
 256                                 this.appendChild( elem );
 257                 });
 258         },
 259
 260         prepend: function() {
 261                 return this.domManip(arguments, true, true, function(elem){
 262                         if (this.nodeType == 1)
 263                                 this.insertBefore( elem, this.firstChild );
 264                 });
 265         },
 266
 267         before: function() {
 268                 return this.domManip(arguments, false, false, function(elem){
 269                         this.parentNode.insertBefore( elem, this );
 270                 });
 271         },
 272
 273         after: function() {
 274                 return this.domManip(arguments, false, true, function(elem){
 275                         this.parentNode.insertBefore( elem, this.nextSibling );
 276                 });
 277         },
 278
 279         end: function() {
 280                 return this.prevObject || jQuery( [] );
 281         },
 282
 283         find: function( selector ) {
 284                 var elems = jQuery.map(this, function(elem){
 285                         return jQuery.find( selector, elem );
 286                 });
 287
 288                 return this.pushStack( /[^+>] [^+>]/.test( selector ) || selector.indexOf("..") > -1 ?
 289                         jQuery.unique( elems ) :
 290                         elems );
 291         },
 292
 293         clone: function( events ) {
 294                 // Do the clone
 295                 var ret = this.map(function(){
 296                         if ( jQuery.browser.msie && !jQuery.isXMLDoc(this) ) {
 297                                 // IE copies events bound via attachEvent when
 298                                 // using cloneNode. Calling detachEvent on the
 299                                 // clone will also remove the events from the orignal
 300                                 // In order to get around this, we use innerHTML.
 301                                 // Unfortunately, this means some modifications to
 302                                 // attributes in IE that are actually only stored
 303                                 // as properties will not be copied (such as the
 304                                 // the name attribute on an input).
 305                                 var clone = this.cloneNode(true),
 306                                         container = document.createElement("div"),
 307                                         container2 = document.createElement("div");
 308                                 container.appendChild(clone);
 309                                 container2.innerHTML = container.innerHTML;
 310                                 return container2.firstChild;
 311                         } else
 312                                 return this.cloneNode(true);
 313                 });
 314
 315                 // Need to set the expando to null on the cloned set if it exists
 316                 // removeData doesn't work here, IE removes it from the original as well
 317                 // this is primarily for IE but the data expando shouldn't be copied over in any browser
 318                 var clone = ret.find("*").andSelf().each(function(){
 319                         if ( this[ expando ] != undefined )
 320                                 this[ expando ] = null;
 321                 });
 322
 323                 // Copy the events from the original to the clone
 324                 if ( events === true )
 325                         this.find("*").andSelf().each(function(i){
 326                                 var events = jQuery.data( this, "events" );
 327
 328                                 for ( var type in events )
 329                                         for ( var handler in events[ type ] )
 330                                                 jQuery.event.add( clone[ i ], type, events[ type ][ handler ], events[ type ][ handler ].data );
 331                         });
 332
 333                 // Return the cloned set
 334                 return ret;
 335         },
 336
 337         filter: function( selector ) {
 338                 return this.pushStack(
 339                         jQuery.isFunction( selector ) &&
 340                         jQuery.grep(this, function(elem, i){
 341                                 return selector.call( elem, i );
 342                         }) ||
 343
 344                         jQuery.multiFilter( selector, this ) );
 345         },
 346
 347         not: function( selector ) {
 348                 if ( selector.constructor == String )
 349                         // test special case where just one selector is passed in
 350                         if ( isSimple.test( selector ) )
 351                                 return this.pushStack( jQuery.multiFilter( selector, this, true ) );
 352                         else
 353                                 selector = jQuery.multiFilter( selector, this );
 354
 355                 var isArrayLike = selector.length && selector[selector.length - 1] !== undefined && !selector.nodeType;
 356                 return this.filter(function() {
 357                         return isArrayLike ? jQuery.inArray( this, selector ) < 0 : this != selector;
 358                 });
 359         },
 360
 361         add: function( selector ) {
 362                 return !selector ? this : this.pushStack( jQuery.merge(
 363                         this.get(),
 364                         selector.constructor == String ?
 365                                 jQuery( selector ).get() :
 366                                 selector.length != undefined && (!selector.nodeName || jQuery.nodeName(selector, "form")) ?
 367                                         selector : [selector] ) );
 368         },
 369
 370         is: function( selector ) {
 371                 return selector ?
 372                         jQuery.multiFilter( selector, this ).length > 0 :
 373                         false;
 374         },
 375
 376         hasClass: function( selector ) {
 377                 return this.is( "." + selector );
 378         },
 379
 380         val: function( value ) {
 381                 if ( value == undefined ) {
 382
 383                         if ( this.length ) {
 384                                 var elem = this[0];
 385
 386                                 // We need to handle select boxes special
 387                                 if ( jQuery.nodeName( elem, "select" ) ) {
 388                                         var index = elem.selectedIndex,
 389                                                 values = [],
 390                                                 options = elem.options,
 391                                                 one = elem.type == "select-one";
 392
 393                                         // Nothing was selected
 394                                         if ( index < 0 )
 395                                                 return null;
 396
 397                                         // Loop through all the selected options
 398                                         for ( var i = one ? index : 0, max = one ? index + 1 : options.length; i < max; i++ ) {
 399                                                 var option = options[ i ];
 400
 401                                                 if ( option.selected ) {
 402                                                         // Get the specifc value for the option
 403                                                         value = jQuery.browser.msie && !option.attributes.value.specified ? option.text : option.value;
 404
 405                                                         // We don't need an array for one selects
 406                                                         if ( one )
 407                                                                 return value;
 408
 409                                                         // Multi-Selects return an array
 410                                                         values.push( value );
 411                                                 }
 412                                         }
 413
 414                                         return values;
 415
 416                                 // Everything else, we just grab the value
 417                                 } else
 418                                         return (this[0].value || "").replace(/\r/g, "");
 419
 420                         }
 421
 422                         return undefined;
 423                 }
 424
 425                 return this.each(function(){
 426                         if ( this.nodeType != 1 )
 427                                 return;
 428
 429                         if ( value.constructor == Array && /radio|checkbox/.test( this.type ) )
 430                                 this.checked = (jQuery.inArray(this.value, value) >= 0 ||
 431                                         jQuery.inArray(this.name, value) >= 0);
 432
 433                         else if ( jQuery.nodeName( this, "select" ) ) {
 434                                 var values = value.constructor == Array ?
 435                                         value :
 436                                         [ value ];
 437
 438                                 jQuery( "option", this ).each(function(){
 439                                         this.selected = (jQuery.inArray( this.value, values ) >= 0 ||
 440                                                 jQuery.inArray( this.text, values ) >= 0);
 441                                 });
 442
 443                                 if ( !values.length )
 444                                         this.selectedIndex = -1;
 445
 446                         } else
 447                                 this.value = value;
 448                 });
 449         },
 450
 451         html: function( value ) {
 452                 return value == undefined ?
 453                         (this.length ?
 454                                 this[0].innerHTML :
 455                                 null) :
 456                         this.empty().append( value );
 457         },
 458
 459         replaceWith: function( value ) {
 460                 return this.after( value ).remove();
 461         },
 462
 463         eq: function( i ) {
 464                 return this.slice( i, i + 1 );
 465         },
 466
 467         slice: function() {
 468                 return this.pushStack( Array.prototype.slice.apply( this, arguments ) );
 469         },
 470
 471         map: function( callback ) {
 472                 return this.pushStack( jQuery.map(this, function(elem, i){
 473                         return callback.call( elem, i, elem );
 474                 }));
 475         },
 476
 477         andSelf: function() {
 478                 return this.add( this.prevObject );
 479         },
 480
 481         domManip: function( args, table, reverse, callback ) {
 482                 var clone = this.length > 1, elems;
 483
 484                 return this.each(function(){
 485                         if ( !elems ) {
 486                                 elems = jQuery.clean( args, this.ownerDocument );
 487
 488                                 if ( reverse )
 489                                         elems.reverse();
 490                         }
 491
 492                         var obj = this;
 493
 494                         if ( table && jQuery.nodeName( this, "table" ) && jQuery.nodeName( elems[0], "tr" ) )
 495                                 obj = this.getElementsByTagName("tbody")[0] || this.appendChild( this.ownerDocument.createElement("tbody") );
 496
 497                         var scripts = jQuery( [] );
 498
 499                         jQuery.each(elems, function(){
 500                                 var elem = clone ?
 501                                         jQuery( this ).clone( true )[0] :
 502                                         this;
 503
 504                                 // execute all scripts after the elements have been injected
 505                                 if ( jQuery.nodeName( elem, "script" ) ) {
 506                                         scripts = scripts.add( elem );
 507                                 } else {
 508                                         // Remove any inner scripts for later evaluation
 509                                         if ( elem.nodeType == 1 )
 510                                                 scripts = scripts.add( jQuery( "script", elem ).remove() );
 511
 512                                         // Inject the elements into the document
 513                                         callback.call( obj, elem );
 514                                 }
 515                         });
 516
 517                         scripts.each( evalScript );
 518                 });
 519         }
 520 };
 521
 522 // Give the init function the jQuery prototype for later instantiation
 523 jQuery.prototype.init.prototype = jQuery.prototype;
 524
 525 function evalScript( i, elem ) {
 526         if ( elem.src )
 527                 jQuery.ajax({
 528                         url: elem.src,
 529                         async: false,
 530                         dataType: "script"
 531                 });
 532
 533         else
 534                 jQuery.globalEval( elem.text || elem.textContent || elem.innerHTML || "" );
 535
 536         if ( elem.parentNode )
 537                 elem.parentNode.removeChild( elem );
 538 }
 539
 540 jQuery.extend = jQuery.fn.extend = function() {
 541         // copy reference to target object
 542         var target = arguments[0] || {}, i = 1, length = arguments.length, deep = false, options;
 543
 544         // Handle a deep copy situation
 545         if ( target.constructor == Boolean ) {
 546                 deep = target;
 547                 target = arguments[1] || {};
 548                 // skip the boolean and the target
 549                 i = 2;
 550         }
 551
 552         // Handle case when target is a string or something (possible in deep copy)
 553         if ( typeof target != "object" && typeof target != "function" )
 554                 target = {};
 555
 556         // extend jQuery itself if only one argument is passed
 557         if ( length == 1 ) {
 558                 target = this;
 559                 i = 0;
 560         }
 561
 562         for ( ; i < length; i++ )
 563                 // Only deal with non-null/undefined values
 564                 if ( (options = arguments[ i ]) != null )
 565                         // Extend the base object
 566                         for ( var name in options ) {
 567                                 // Prevent never-ending loop
 568                                 if ( target === options[ name ] )
 569                                         continue;
 570
 571                                 // Recurse if we're merging object values
 572                                 if ( deep && options[ name ] && typeof options[ name ] == "object" && target[ name ] && !options[ name ].nodeType )
 573                                         target[ name ] = jQuery.extend( target[ name ], options[ name ] );
 574
 575                                 // Don't bring in undefined values
 576                                 else if ( options[ name ] != undefined )
 577                                         target[ name ] = options[ name ];
 578
 579                         }
 580
 581         // Return the modified object
 582         return target;
 583 };
 584
 585 var expando = "jQuery" + (new Date()).getTime(), uuid = 0, windowData = {};
 586
 587 // exclude the following css properties to add px
 588 var exclude = /z-?index|font-?weight|opacity|zoom|line-?height/i;
 589
 590 jQuery.extend({
 591         noConflict: function( deep ) {
 592                 window.$ = _$;
 593
 594                 if ( deep )
 595                         window.jQuery = _jQuery;
 596
 597                 return jQuery;
 598         },
 599
 600         // This may seem like some crazy code, but trust me when I say that this
 601         // is the only cross-browser way to do this. --John
 602         isFunction: function( fn ) {
 603                 return !!fn && typeof fn != "string" && !fn.nodeName &&
 604                         fn.constructor != Array && /function/i.test( fn + "" );
 605         },
 606
 607         // check if an element is in a (or is an) XML document
 608         isXMLDoc: function( elem ) {
 609                 return elem.documentElement && !elem.body ||
 610                         elem.tagName && elem.ownerDocument && !elem.ownerDocument.body;
 611         },
 612
 613         // Evalulates a script in a global context
 614         globalEval: function( data ) {
 615                 data = jQuery.trim( data );
 616
 617                 if ( data ) {
 618                         // Inspired by code by Andrea Giammarchi
 619                         // http://webreflection.blogspot.com/2007/08/global-scope-evaluation-and-dom.html
 620                         var head = document.getElementsByTagName("head")[0] || document.documentElement,
 621                                 script = document.createElement("script");
 622
 623                         script.type = "text/javascript";
 624                         if ( jQuery.browser.msie )
 625                                 script.text = data;
 626                         else
 627                                 script.appendChild( document.createTextNode( data ) );
 628
 629                         head.appendChild( script );
 630                         head.removeChild( script );
 631                 }
 632         },
 633
 634         nodeName: function( elem, name ) {
 635                 return elem.nodeName && elem.nodeName.toUpperCase() == name.toUpperCase();
 636         },
 637
 638         cache: {},
 639
 640         data: function( elem, name, data ) {
 641                 elem = elem == window ?
 642                         windowData :
 643                         elem;
 644
 645                 var id = elem[ expando ];
 646
 647                 // Compute a unique ID for the element
 648                 if ( !id )
 649                         id = elem[ expando ] = ++uuid;
 650
 651                 // Only generate the data cache if we're
 652                 // trying to access or manipulate it
 653                 if ( name && !jQuery.cache[ id ] )
 654                         jQuery.cache[ id ] = {};
 655
 656                 // Prevent overriding the named cache with undefined values
 657                 if ( data != undefined )
 658                         jQuery.cache[ id ][ name ] = data;
 659
 660                 // Return the named cache data, or the ID for the element
 661                 return name ?
 662                         jQuery.cache[ id ][ name ] :
 663                         id;
 664         },
 665
 666         removeData: function( elem, name ) {
 667                 elem = elem == window ?
 668                         windowData :
 669                         elem;
 670
 671                 var id = elem[ expando ];
 672
 673                 // If we want to remove a specific section of the element's data
 674                 if ( name ) {
 675                         if ( jQuery.cache[ id ] ) {
 676                                 // Remove the section of cache data
 677                                 delete jQuery.cache[ id ][ name ];
 678
 679                                 // If we've removed all the data, remove the element's cache
 680                                 name = "";
 681
 682                                 for ( name in jQuery.cache[ id ] )
 683                                         break;
 684
 685                                 if ( !name )
 686                                         jQuery.removeData( elem );
 687                         }
 688
 689                 // Otherwise, we want to remove all of the element's data
 690                 } else {
 691                         // Clean up the element expando
 692                         try {
 693                                 delete elem[ expando ];
 694                         } catch(e){
 695                                 // IE has trouble directly removing the expando
 696                                 // but it's ok with using removeAttribute
 697                                 if ( elem.removeAttribute )
 698                                         elem.removeAttribute( expando );
 699                         }
 700
 701                         // Completely remove the data cache
 702                         delete jQuery.cache[ id ];
 703                 }
 704         },
 705
 706         // args is for internal usage only
 707         each: function( object, callback, args ) {
 708                 if ( args ) {
 709                         if ( object.length == undefined )
 710                                 for ( var name in object )
 711                                         callback.apply( object[ name ], args );
 712                         else
 713                                 for ( var i = 0, length = object.length; i < length; i++ )
 714                                         if ( callback.apply( object[ i ], args ) === false )
 715                                                 break;
 716
 717                 // A special, fast, case for the most common use of each
 718                 } else {
 719                         if ( object.length == undefined )
 720                                 for ( var name in object )
 721                                         callback.call( object[ name ], name, object[ name ] );
 722                         else
 723                                 for ( var i = 0, length = object.length, value = object[0];
 724                                         i < length && callback.call( value, i, value ) !== false; value = object[++i] ){}
 725                 }
 726
 727                 return object;
 728         },
 729
 730         prop: function( elem, value, type, i, name ) {
 731                         // Handle executable functions
 732                         if ( jQuery.isFunction( value ) )
 733                                 value = value.call( elem, i );
 734
 735                         // Handle passing in a number to a CSS property
 736                         return value && value.constructor == Number && type == "curCSS" && !exclude.test( name ) ?
 737                                 value + "px" :
 738                                 value;
 739         },
 740
 741         className: {
 742                 // internal only, use addClass("class")
 743                 add: function( elem, classNames ) {
 744                         jQuery.each((classNames || "").split(/\s+/), function(i, className){
 745                                 if ( elem.nodeType == 1 && !jQuery.className.has( elem.className, className ) )
 746                                         elem.className += (elem.className ? " " : "") + className;
 747                         });
 748                 },
 749
 750                 // internal only, use removeClass("class")
 751                 remove: function( elem, classNames ) {
 752                         if (elem.nodeType == 1)
 753                                 elem.className = classNames != undefined ?
 754                                         jQuery.grep(elem.className.split(/\s+/), function(className){
 755                                                 return !jQuery.className.has( classNames, className );
 756                                         }).join(" ") :
 757                                         "";
 758                 },
 759
 760                 // internal only, use is(".class")
 761                 has: function( elem, className ) {
 762                         return jQuery.inArray( className, (elem.className || elem).toString().split(/\s+/) ) > -1;
 763                 }
 764         },
 765
 766         // A method for quickly swapping in/out CSS properties to get correct calculations
 767         swap: function( elem, options, callback ) {
 768                 var old = {};
 769                 // Remember the old values, and insert the new ones
 770                 for ( var name in options ) {
 771                         old[ name ] = elem.style[ name ];
 772                         elem.style[ name ] = options[ name ];
 773                 }
 774
 775                 callback.call( elem );
 776
 777                 // Revert the old values
 778                 for ( var name in options )
 779                         elem.style[ name ] = old[ name ];
 780         },
 781
 782         css: function( elem, name, force ) {
 783                 if ( name == "width" || name == "height" ) {
 784                         var val, props = { position: "absolute", visibility: "hidden", display:"block" }, which = name == "width" ? [ "Left", "Right" ] : [ "Top", "Bottom" ];
 785
 786                         function getWH() {
 787                                 val = name == "width" ? elem.offsetWidth : elem.offsetHeight;
 788                                 var padding = 0, border = 0;
 789                                 jQuery.each( which, function() {
 790                                         padding += parseFloat(jQuery.curCSS( elem, "padding" + this, true)) || 0;
 791                                         border += parseFloat(jQuery.curCSS( elem, "border" + this + "Width", true)) || 0;
 792                                 });
 793                                 val -= Math.round(padding + border);
 794                         }
 795
 796                         if ( jQuery(elem).is(":visible") )
 797                                 getWH();
 798                         else
 799                                 jQuery.swap( elem, props, getWH );
 800
 801                         return Math.max(0, val);
 802                 }
 803
 804                 return jQuery.curCSS( elem, name, force );
 805         },
 806
 807         curCSS: function( elem, name, force ) {
 808                 var ret;
 809
 810                 // A helper method for determining if an element's values are broken
 811                 function color( elem ) {
 812                         if ( !jQuery.browser.safari )
 813                                 return false;
 814
 815                         var ret = document.defaultView.getComputedStyle( elem, null );
 816                         return !ret || ret.getPropertyValue("color") == "";
 817                 }
 818
 819                 // We need to handle opacity special in IE
 820                 if ( name == "opacity" && jQuery.browser.msie ) {
 821                         ret = jQuery.attr( elem.style, "opacity" );
 822
 823                         return ret == "" ?
 824                                 "1" :
 825                                 ret;
 826                 }
 827                 // Opera sometimes will give the wrong display answer, this fixes it, see #2037
 828                 if ( jQuery.browser.opera && name == "display" ) {
 829                         var save = elem.style.display;
 830                         elem.style.display = "block";
 831                         elem.style.display = save;
 832                 }
 833
 834                 // Make sure we're using the right name for getting the float value
 835                 if ( name.match( /float/i ) )
 836                         name = styleFloat;
 837
 838                 if ( !force && elem.style[ name ] )
 839                         ret = elem.style[ name ];
 840
 841                 else if ( document.defaultView && document.defaultView.getComputedStyle ) {
 842
 843                         // Only "float" is needed here
 844                         if ( name.match( /float/i ) )
 845                                 name = "float";
 846
 847                         name = name.replace( /([A-Z])/g, "-$1" ).toLowerCase();
 848
 849                         var getComputedStyle = document.defaultView.getComputedStyle( elem, null );
 850
 851                         if ( getComputedStyle && !color( elem ) )
 852                                 ret = getComputedStyle.getPropertyValue( name );
 853
 854                         // If the element isn't reporting its values properly in Safari
 855                         // then some display: none elements are involved
 856                         else {
 857                                 var swap = [], stack = [];
 858
 859                                 // Locate all of the parent display: none elements
 860                                 for ( var a = elem; a && color(a); a = a.parentNode )
 861                                         stack.unshift(a);
 862
 863                                 // Go through and make them visible, but in reverse
 864                                 // (It would be better if we knew the exact display type that they had)
 865                                 for ( var i = 0; i < stack.length; i++ )
 866                                         if ( color( stack[ i ] ) ) {
 867                                                 swap[ i ] = stack[ i ].style.display;
 868                                                 stack[ i ].style.display = "block";
 869                                         }
 870
 871                                 // Since we flip the display style, we have to handle that
 872                                 // one special, otherwise get the value
 873                                 ret = name == "display" && swap[ stack.length - 1 ] != null ?
 874                                         "none" :
 875                                         ( getComputedStyle && getComputedStyle.getPropertyValue( name ) ) || "";
 876
 877                                 // Finally, revert the display styles back
 878                                 for ( var i = 0; i < swap.length; i++ )
 879                                         if ( swap[ i ] != null )
 880                                                 stack[ i ].style.display = swap[ i ];
 881                         }
 882
 883                         // We should always get a number back from opacity
 884                         if ( name == "opacity" && ret == "" )
 885                                 ret = "1";
 886
 887                 } else if ( elem.currentStyle ) {
 888                         var camelCase = name.replace(/\-(\w)/g, function(all, letter){
 889                                 return letter.toUpperCase();
 890                         });
 891
 892                         ret = elem.currentStyle[ name ] || elem.currentStyle[ camelCase ];
 893
 894                         // From the awesome hack by Dean Edwards
 895                         // http://erik.eae.net/archives/2007/07/27/18.54.15/#comment-102291
 896
 897                         // If we're not dealing with a regular pixel number
 898                         // but a number that has a weird ending, we need to convert it to pixels
 899                         if ( !/^\d+(px)?$/i.test( ret ) && /^\d/.test( ret ) ) {
 900                                 // Remember the original values
 901                                 var style = elem.style.left, runtimeStyle = elem.runtimeStyle.left;
 902
 903                                 // Put in the new values to get a computed value out
 904                                 elem.runtimeStyle.left = elem.currentStyle.left;
 905                                 elem.style.left = ret || 0;
 906                                 ret = elem.style.pixelLeft + "px";
 907
 908                                 // Revert the changed values
 909                                 elem.style.left = style;
 910                                 elem.runtimeStyle.left = runtimeStyle;
 911                         }
 912                 }
 913
 914                 return ret;
 915         },
 916
 917         clean: function( elems, context ) {
 918                 var ret = [];
 919                 context = context || document;
 920                 // !context.createElement fails in IE with an error but returns typeof 'object'
 921                 if (typeof context.createElement == 'undefined')
 922                         context = context.ownerDocument || context[0] && context[0].ownerDocument || document;
 923
 924                 jQuery.each(elems, function(i, elem){
 925                         if ( !elem )
 926                                 return;
 927
 928                         if ( elem.constructor == Number )
 929                                 elem = elem.toString();
 930
 931                         // Convert html string into DOM nodes
 932                         if ( typeof elem == "string" ) {
 933                                 // Fix "XHTML"-style tags in all browsers
 934                                 elem = elem.replace(/(<(\w+)[^>]*?)\/>/g, function(all, front, tag){
 935                                         return tag.match(/^(abbr|br|col|img|input|link|meta|param|hr|area)$/i) ?
 936                                                 all :
 937                                                 front + "></" + tag + ">";
 938                                 });
 939
 940                                 // Trim whitespace, otherwise indexOf won't work as expected
 941                                 var tags = jQuery.trim( elem ).toLowerCase(), div = context.createElement("div");
 942
 943                                 var wrap =
 944                                         // option or optgroup
 945                                         !tags.indexOf("<opt") &&
 946                                         [ 1, "<select multiple='multiple'>", "</select>" ] ||
 947
 948                                         !tags.indexOf("<leg") &&
 949                                         [ 1, "<fieldset>", "</fieldset>" ] ||
 950
 951                                         tags.match(/^<(thead|tbody|tfoot|colg|cap)/) &&
 952                                         [ 1, "<table>", "</table>" ] ||
 953
 954                                         !tags.indexOf("<tr") &&
 955                                         [ 2, "<table><tbody>", "</tbody></table>" ] ||
 956
 957                                         // <thead> matched above
 958                                         (!tags.indexOf("<td") || !tags.indexOf("<th")) &&
 959                                         [ 3, "<table><tbody><tr>", "</tr></tbody></table>" ] ||
 960
 961                                         !tags.indexOf("<col") &&
 962                                         [ 2, "<table><tbody></tbody><colgroup>", "</colgroup></table>" ] ||
 963
 964                                         // IE can't serialize <link> and <script> tags normally
 965                                         jQuery.browser.msie &&
 966                                         [ 1, "div<div>", "</div>" ] ||
 967
 968                                         [ 0, "", "" ];
 969
 970                                 // Go to html and back, then peel off extra wrappers
 971                                 div.innerHTML = wrap[1] + elem + wrap[2];
 972
 973                                 // Move to the right depth
 974                                 while ( wrap[0]-- )
 975                                         div = div.lastChild;
 976
 977                                 // Remove IE's autoinserted <tbody> from table fragments
 978                                 if ( jQuery.browser.msie ) {
 979
 980                                         // String was a <table>, *may* have spurious <tbody>
 981                                         var tbody = !tags.indexOf("<table") && tags.indexOf("<tbody") < 0 ?
 982                                                 div.firstChild && div.firstChild.childNodes :
 983
 984                                                 // String was a bare <thead> or <tfoot>
 985                                                 wrap[1] == "<table>" && tags.indexOf("<tbody") < 0 ?
 986                                                         div.childNodes :
 987                                                         [];
 988
 989                                         for ( var j = tbody.length - 1; j >= 0 ; --j )
 990                                                 if ( jQuery.nodeName( tbody[ j ], "tbody" ) && !tbody[ j ].childNodes.length )
 991                                                         tbody[ j ].parentNode.removeChild( tbody[ j ] );
 992
 993                                         // IE completely kills leading whitespace when innerHTML is used
 994                                         if ( /^\s/.test( elem ) )
 995                                                 div.insertBefore( context.createTextNode( elem.match(/^\s*/)[0] ), div.firstChild );
 996
 997                                 }
 998
 999                                 elem = jQuery.makeArray( div.childNodes );
1000                         }
1001
1002                         if ( elem.length === 0 && (!jQuery.nodeName( elem, "form" ) && !jQuery.nodeName( elem, "select" )) )
1003                                 return;
1004
1005                         if ( elem[0] == undefined || jQuery.nodeName( elem, "form" ) || elem.options )
1006                                 ret.push( elem );
1007
1008                         else
1009                                 ret = jQuery.merge( ret, elem );
1010
1011                 });
1012
1013                 return ret;
1014         },
1015
1016         attr: function( elem, name, value ) {
1017                 // don't set attributes on text and comment nodes
1018                 if (!elem || elem.nodeType == 3 || elem.nodeType == 8)
1019                         return undefined;
1020
1021                 var fix = jQuery.isXMLDoc( elem ) ?
1022                         {} :
1023                         jQuery.props;
1024
1025                 // Safari mis-reports the default selected property of a hidden option
1026                 // Accessing the parent's selectedIndex property fixes it
1027                 if ( name == "selected" && jQuery.browser.safari )
1028                         elem.parentNode.selectedIndex;
1029
1030                 // Certain attributes only work when accessed via the old DOM 0 way
1031                 if ( fix[ name ] ) {
1032                         if ( value != undefined )
1033                                 elem[ fix[ name ] ] = value;
1034
1035                         return elem[ fix[ name ] ];
1036
1037                 } else if ( jQuery.browser.msie && name == "style" )
1038                         return jQuery.attr( elem.style, "cssText", value );
1039
1040                 else if ( value == undefined && jQuery.browser.msie && jQuery.nodeName( elem, "form" ) && (name == "action" || name == "method") )
1041                         return elem.getAttributeNode( name ).nodeValue;
1042
1043                 // IE elem.getAttribute passes even for style
1044                 else if ( elem.tagName ) {
1045
1046                         if ( value != undefined ) {
1047                                 // We can't allow the type property to be changed (since it causes problems in IE)
1048                                 if ( name == "type" && jQuery.nodeName( elem, "input" ) && elem.parentNode )
1049                                         throw "type property can't be changed";
1050
1051                                 // convert the value to a string (all browsers do this but IE) see #1070
1052                                 elem.setAttribute( name, "" + value );
1053                         }
1054
1055                         if ( jQuery.browser.msie && /href|src/.test( name ) && !jQuery.isXMLDoc( elem ) )
1056                                 return elem.getAttribute( name, 2 );
1057
1058                         return elem.getAttribute( name );
1059
1060                 // elem is actually elem.style ... set the style
1061                 } else {
1062                         // IE actually uses filters for opacity
1063                         if ( name == "opacity" && jQuery.browser.msie ) {
1064                                 if ( value != undefined ) {
1065                                         // IE has trouble with opacity if it does not have layout
1066                                         // Force it by setting the zoom level
1067                                         elem.zoom = 1;
1068
1069                                         // Set the alpha filter to set the opacity
1070                                         elem.filter = (elem.filter || "").replace( /alpha\([^)]*\)/, "" ) +
1071                                                 (parseFloat( value ).toString() == "NaN" ? "" : "alpha(opacity=" + value * 100 + ")");
1072                                 }
1073
1074                                 return elem.filter && elem.filter.indexOf("opacity=") >= 0 ?
1075                                         (parseFloat( elem.filter.match(/opacity=([^)]*)/)[1] ) / 100).toString() :
1076                                         "";
1077                         }
1078
1079                         name = name.replace(/-([a-z])/ig, function(all, letter){
1080                                 return letter.toUpperCase();
1081                         });
1082
1083                         if ( value != undefined )
1084                                 elem[ name ] = value;
1085
1086                         return elem[ name ];
1087                 }
1088         },
1089
1090         trim: function( text ) {
1091                 return (text || "").replace( /^\s+|\s+$/g, "" );
1092         },
1093
1094         makeArray: function( array ) {
1095                 var ret = [];
1096
1097                 // Need to use typeof to fight Safari childNodes crashes
1098                 if ( typeof array != "array" )
1099                         for ( var i = 0, length = array.length; i < length; i++ )
1100                                 ret.push( array[ i ] );
1101                 else
1102                         ret = array.slice( 0 );
1103
1104                 return ret;
1105         },
1106
1107         inArray: function( elem, array ) {
1108                 for ( var i = 0, length = array.length; i < length; i++ )
1109                         if ( array[ i ] == elem )
1110                                 return i;
1111
1112                 return -1;
1113         },
1114
1115         merge: function( first, second ) {
1116                 // We have to loop this way because IE & Opera overwrite the length
1117                 // expando of getElementsByTagName
1118
1119                 // Also, we need to make sure that the correct elements are being returned
1120                 // (IE returns comment nodes in a '*' query)
1121                 if ( jQuery.browser.msie ) {
1122                         for ( var i = 0; second[ i ]; i++ )
1123                                 if ( second[ i ].nodeType != 8 )
1124                                         first.push( second[ i ] );
1125
1126                 } else
1127                         for ( var i = 0; second[ i ]; i++ )
1128                                 first.push( second[ i ] );
1129
1130                 return first;
1131         },
1132
1133         unique: function( array ) {
1134                 var ret = [], done = {};
1135
1136                 try {
1137
1138                         for ( var i = 0, length = array.length; i < length; i++ ) {
1139                                 var id = jQuery.data( array[ i ] );
1140
1141                                 if ( !done[ id ] ) {
1142                                         done[ id ] = true;
1143                                         ret.push( array[ i ] );
1144                                 }
1145                         }
1146
1147                 } catch( e ) {
1148                         ret = array;
1149                 }
1150
1151                 return ret;
1152         },
1153
1154         grep: function( elems, callback, inv ) {
1155                 // If a string is passed in for the function, make a function
1156                 // for it (a handy shortcut)
1157                 if ( typeof callback == "string" )
1158                         callback = eval("false||function(a,i){return " + callback + "}");
1159
1160                 var ret = [];
1161
1162                 // Go through the array, only saving the items
1163                 // that pass the validator function
1164                 for ( var i = 0, length = elems.length; i < length; i++ )
1165                         if ( !inv && callback( elems[ i ], i ) || inv && !callback( elems[ i ], i ) )
1166                                 ret.push( elems[ i ] );
1167
1168                 return ret;
1169         },
1170
1171         map: function( elems, callback ) {
1172                 var ret = [];
1173
1174                 // Go through the array, translating each of the items to their
1175                 // new value (or values).
1176                 for ( var i = 0, length = elems.length; i < length; i++ ) {
1177                         var value = callback( elems[ i ], i );
1178
1179                         if ( value !== null && value != undefined ) {
1180                                 if ( value.constructor != Array )
1181                                         value = [ value ];
1182
1183                                 ret = ret.concat( value );
1184                         }
1185                 }
1186
1187                 return ret;
1188         }
1189 });
1190
1191 var userAgent = navigator.userAgent.toLowerCase();
1192
1193 // Figure out what browser is being used
1194 jQuery.browser = {
1195         version: (userAgent.match( /.+(?:rv|it|ra|ie)[\/: ]([\d.]+)/ ) || [])[1],
1196         safari: /webkit/.test( userAgent ),
1197         opera: /opera/.test( userAgent ),
1198         msie: /msie/.test( userAgent ) && !/opera/.test( userAgent ),
1199         mozilla: /mozilla/.test( userAgent ) && !/(compatible|webkit)/.test( userAgent )
1200 };
1201
1202 var styleFloat = jQuery.browser.msie ?
1203         "styleFloat" :
1204         "cssFloat";
1205
1206 jQuery.extend({
1207         // Check to see if the W3C box model is being used
1208         boxModel: !jQuery.browser.msie || document.compatMode == "CSS1Compat",
1209
1210         props: {
1211                 "for": "htmlFor",
1212                 "class": "className",
1213                 "float": styleFloat,
1214                 cssFloat: styleFloat,
1215                 styleFloat: styleFloat,
1216                 innerHTML: "innerHTML",
1217                 className: "className",
1218                 value: "value",
1219                 disabled: "disabled",
1220                 checked: "checked",
1221                 readonly: "readOnly",
1222                 selected: "selected",
1223                 maxlength: "maxLength",
1224                 selectedIndex: "selectedIndex",
1225                 defaultValue: "defaultValue",
1226                 tagName: "tagName",
1227                 nodeName: "nodeName"
1228         }
1229 });
1230
1231 jQuery.each({
1232         parent: "elem.parentNode",
1233         parents: "jQuery.dir(elem,'parentNode')",
1234         next: "jQuery.nth(elem,2,'nextSibling')",
1235         prev: "jQuery.nth(elem,2,'previousSibling')",
1236         nextAll: "jQuery.dir(elem,'nextSibling')",
1237         prevAll: "jQuery.dir(elem,'previousSibling')",
1238         siblings: "jQuery.sibling(elem.parentNode.firstChild,elem)",
1239         children: "jQuery.sibling(elem.firstChild)",
1240         contents: "jQuery.nodeName(elem,'iframe')?elem.contentDocument||elem.contentWindow.document:jQuery.makeArray(elem.childNodes)"
1241 }, function(name, fn){
1242         fn = eval("false||function(elem){return " + fn + "}");
1243
1244         jQuery.fn[ name ] = function( selector ) {
1245                 var ret = jQuery.map( this, fn );
1246
1247                 if ( selector && typeof selector == "string" )
1248                         ret = jQuery.multiFilter( selector, ret );
1249
1250                 return this.pushStack( jQuery.unique( ret ) );
1251         };
1252 });
1253
1254 jQuery.each({
1255         appendTo: "append",
1256         prependTo: "prepend",
1257         insertBefore: "before",
1258         insertAfter: "after",
1259         replaceAll: "replaceWith"
1260 }, function(name, original){
1261         jQuery.fn[ name ] = function() {
1262                 var args = arguments;
1263
1264                 return this.each(function(){
1265                         for ( var i = 0, length = args.length; i < length; i++ )
1266                                 jQuery( args[ i ] )[ original ]( this );
1267                 });
1268         };
1269 });
1270
1271 jQuery.each({
1272         removeAttr: function( name ) {
1273                 jQuery.attr( this, name, "" );
1274                 if (this.nodeType == 1)
1275                         this.removeAttribute( name );
1276         },
1277
1278         addClass: function( classNames ) {
1279                 jQuery.className.add( this, classNames );
1280         },
1281
1282         removeClass: function( classNames ) {
1283                 jQuery.className.remove( this, classNames );
1284         },
1285
1286         toggleClass: function( classNames ) {
1287                 jQuery.className[ jQuery.className.has( this, classNames ) ? "remove" : "add" ]( this, classNames );
1288         },
1289
1290         remove: function( selector ) {
1291                 if ( !selector || jQuery.filter( selector, [ this ] ).r.length ) {
1292                         // Prevent memory leaks
1293                         jQuery( "*", this ).add(this).each(function(){
1294                                 jQuery.event.remove(this);
1295                                 jQuery.removeData(this);
1296                         });
1297                         if (this.parentNode)
1298                                 this.parentNode.removeChild( this );
1299                 }
1300         },
1301
1302         empty: function() {
1303                 // Remove element nodes and prevent memory leaks
1304                 jQuery( ">*", this ).remove();
1305
1306                 // Remove any remaining nodes
1307                 while ( this.firstChild )
1308                         this.removeChild( this.firstChild );
1309         }
1310 }, function(name, fn){
1311         jQuery.fn[ name ] = function(){
1312                 return this.each( fn, arguments );
1313         };
1314 });
1315
1316 jQuery.each([ "Height", "Width" ], function(i, name){
1317         var type = name.toLowerCase();
1318
1319         jQuery.fn[ type ] = function( size ) {
1320                 // Get window width or height
1321                 return this[0] == window ?
1322                         // Opera reports document.body.client[Width/Height] properly in both quirks and standards
1323                         jQuery.browser.opera && document.body[ "client" + name ] ||
1324
1325                         // Safari reports inner[Width/Height] just fine (Mozilla and Opera include scroll bar widths)
1326                         jQuery.browser.safari && window[ "inner" + name ] ||
1327
1328                         // Everyone else use document.documentElement or document.body depending on Quirks vs Standards mode
1329                         document.compatMode == "CSS1Compat" && document.documentElement[ "client" + name ] || document.body[ "client" + name ] :
1330
1331                         // Get document width or height
1332                         this[0] == document ?
1333                                 // Either scroll[Width/Height] or offset[Width/Height], whichever is greater
1334                                 Math.max(
1335                                         Math.max(document.body["scroll" + name], document.documentElement["scroll" + name]),
1336                                         Math.max(document.body["offset" + name], document.documentElement["offset" + name])
1337                                 ) :
1338
1339                                 // Get or set width or height on the element
1340                                 size == undefined ?
1341                                         // Get width or height on the element
1342                                         (this.length ? jQuery.css( this[0], type ) : null) :
1343
1344                                         // Set the width or height on the element (default to pixels if value is unitless)
1345                                         this.css( type, size.constructor == String ? size : size + "px" );
1346         };
1347 });