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