src/core.js

   1 var
   2         // Will speed up references to window, and allows munging its name.
   3         window = this,
   4         // Will speed up references to undefined, and allows munging its name.
   5         undefined,
   6         // Map over jQuery in case of overwrite
   7         _jQuery = window.jQuery,
   8         // Map over the $ in case of overwrite
   9         _$ = window.$,
  10
  11         jQuery = window.jQuery = window.$ = function( selector, context ) {
  12                 // The jQuery object is actually just the init constructor 'enhanced'
  13                 return selector === undefined ?
  14                         rootjQuery :
  15                         new jQuery.fn.init( selector, context );
  16         },
  17
  18         // A simple way to check for HTML strings or ID strings
  19         // (both of which we optimize for)
  20         quickExpr = /^[^<]*(<(.|\s)+>)[^>]*$|^#([\w-]+)$/,
  21         // Is it a simple selector
  22         isSimple = /^.[^:#\[\.,]*$/;
  23
  24 jQuery.fn = jQuery.prototype = {
  25         init: function( selector, context ) {
  26                 // Handle $("") or $(null)
  27                 if ( !selector ) {
  28                         this.length = 0;
  29                         return this;
  30                 }
  31
  32                 // Handle $(DOMElement)
  33                 if ( selector.nodeType ) {
  34                         this[0] = selector;
  35                         this.length = 1;
  36                         this.context = selector;
  37                         return this;
  38                 }
  39
  40                 // Handle HTML strings
  41                 if ( typeof selector === "string" ) {
  42                         // Are we dealing with HTML string or an ID?
  43                         var match = quickExpr.exec( selector );
  44
  45                         // Verify a match, and that no context was specified for #id
  46                         if ( match && (match[1] || !context) ) {
  47
  48                                 // HANDLE: $(html) -> $(array)
  49                                 if ( match[1] ) {
  50                                         selector = jQuery.clean( [ match[1] ], context );
  51
  52                                 // HANDLE: $("#id")
  53                                 } else {
  54                                         var elem = document.getElementById( match[3] );
  55
  56                                         // Handle the case where IE and Opera return items
  57                                         // by name instead of ID
  58                                         if ( elem && elem.id != match[3] ) {
  59                                                 return rootjQuery.find( selector );
  60                                         }
  61
  62                                         // Otherwise, we inject the element directly into the jQuery object
  63                                         var ret = jQuery( elem || null );
  64                                         ret.context = document;
  65                                         ret.selector = selector;
  66                                         return ret;
  67                                 }
  68
  69                         // HANDLE: $(expr, $(...))
  70                         } else if ( !context || context.jquery ) {
  71                                 return (context || rootjQuery).find( selector );
  72
  73                         // HANDLE: $(expr, context)
  74                         // (which is just equivalent to: $(content).find(expr)
  75                         } else {
  76                                 return jQuery( context ).find( selector );
  77                         }
  78
  79                 // HANDLE: $(function)
  80                 // Shortcut for document ready
  81                 } else if ( jQuery.isFunction( selector ) ) {
  82                         return rootjQuery.ready( selector );
  83                 }
  84
  85                 // Make sure that old selector state is passed along
  86                 if ( selector.selector && selector.context ) {
  87                         this.selector = selector.selector;
  88                         this.context = selector.context;
  89                 }
  90
  91                 return this.setArray(jQuery.isArray( selector ) ?
  92                         selector :
  93                         jQuery.makeArray(selector));
  94         },
  95
  96         // Start with an empty selector
  97         selector: "",
  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         // Get the Nth element in the matched element set OR
 108         // Get the whole matched element set as a clean array
 109         get: function( num ) {
 110                 return num === undefined ?
 111
 112                         // Return a 'clean' array
 113                         Array.prototype.slice.call( this ) :
 114
 115                         // Return just the object
 116                         this[ num ];
 117         },
 118
 119         // Take an array of elements and push it onto the stack
 120         // (returning the new matched element set)
 121         pushStack: function( elems, name, selector ) {
 122                 // Build a new jQuery matched element set
 123                 var ret = jQuery( elems || null );
 124
 125                 // Add the old object onto the stack (as a reference)
 126                 ret.prevObject = this;
 127
 128                 ret.context = this.context;
 129
 130                 if ( name === "find" )
 131                         ret.selector = this.selector + (this.selector ? " " : "") + selector;
 132                 else if ( name )
 133                         ret.selector = this.selector + "." + name + "(" + selector + ")";
 134
 135                 // Return the newly-formed element set
 136                 return ret;
 137         },
 138
 139         // Force the current matched set of elements to become
 140         // the specified array of elements (destroying the stack in the process)
 141         // You should use pushStack() in order to do this, but maintain the stack
 142         setArray: function( elems ) {
 143                 // Resetting the length to 0, then using the native Array push
 144                 // is a super-fast way to populate an object with array-like properties
 145                 this.length = 0;
 146                 Array.prototype.push.apply( this, elems );
 147
 148                 return this;
 149         },
 150
 151         // Execute a callback for every element in the matched set.
 152         // (You can seed the arguments with an array of args, but this is
 153         // only used internally.)
 154         each: function( callback, args ) {
 155                 return jQuery.each( this, callback, args );
 156         },
 157
 158         // Determine the position of an element within
 159         // the matched set of elements
 160         index: function( elem ) {
 161                 // Locate the position of the desired element
 162                 return jQuery.inArray(
 163                         // If it receives a jQuery object, the first element is used
 164                         elem && elem.jquery ? elem[0] : elem
 165                 , this );
 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 ( typeof name === "string" )
 173                         if ( value === undefined )
 174                                 return this[0] && jQuery[ type || "attr" ]( this[0], name );
 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                         var wrap = jQuery( html, this[0].ownerDocument ).clone();
 223
 224                         if ( this[0].parentNode )
 225                                 wrap.insertBefore( this[0] );
 226
 227                         wrap.map(function(){
 228                                 var elem = this;
 229
 230                                 while ( elem.firstChild )
 231                                         elem = elem.firstChild;
 232
 233                                 return elem;
 234                         }).append(this);
 235                 }
 236
 237                 return this;
 238         },
 239
 240         wrapInner: function( html ) {
 241                 return this.each(function(){
 242                         jQuery( this ).contents().wrapAll( html );
 243                 });
 244         },
 245
 246         wrap: function( html ) {
 247                 return this.each(function(){
 248                         jQuery( this ).wrapAll( html );
 249                 });
 250         },
 251
 252         append: function() {
 253                 return this.domManip(arguments, true, function(elem){
 254                         if (this.nodeType == 1)
 255                                 this.appendChild( elem );
 256                 });
 257         },
 258
 259         prepend: function() {
 260                 return this.domManip(arguments, true, function(elem){
 261                         if (this.nodeType == 1)
 262                                 this.insertBefore( elem, this.firstChild );
 263                 });
 264         },
 265
 266         before: function() {
 267                 return this.domManip(arguments, false, function(elem){
 268                         this.parentNode.insertBefore( elem, this );
 269                 });
 270         },
 271
 272         after: function() {
 273                 return this.domManip(arguments, false, function(elem){
 274                         this.parentNode.insertBefore( elem, this.nextSibling );
 275                 });
 276         },
 277
 278         end: function() {
 279                 return this.prevObject || jQuery(null);
 280         },
 281
 282         find: function( selector ) {
 283                 var ret = this.pushStack( "", "find", selector ), length = 0,
 284                         splice = Array.prototype.splice;
 285
 286                 for ( var i = 0, l = this.length; i < l; i++ ) {
 287                         length = ret.length;
 288                         jQuery.find( selector, this[i], ret );
 289
 290                         if ( i > 0 ) {
 291                                 // Make sure that the results are unique
 292                                 for ( var n = length; n < ret.length; n++ ) {
 293                                         for ( var r = 0; r < length; r++ ) {
 294                                                 if ( ret[r] === ret[n] ) {
 295                                                         splice.call(ret, n--, 1);
 296                                                         break;
 297                                                 }
 298                                         }
 299                                 }
 300                         }
 301                 }
 302
 303                 return ret;
 304         },
 305
 306         clone: function( events ) {
 307                 // Do the clone
 308                 var ret = this.map(function(){
 309                         if ( !jQuery.support.noCloneEvent && !jQuery.isXMLDoc(this) ) {
 310                                 // IE copies events bound via attachEvent when
 311                                 // using cloneNode. Calling detachEvent on the
 312                                 // clone will also remove the events from the orignal
 313                                 // In order to get around this, we use innerHTML.
 314                                 // Unfortunately, this means some modifications to
 315                                 // attributes in IE that are actually only stored
 316                                 // as properties will not be copied (such as the
 317                                 // the name attribute on an input).
 318                                 var html = this.outerHTML;
 319                                 if ( !html ) {
 320                                         var div = this.ownerDocument.createElement("div");
 321                                         div.appendChild( this.cloneNode(true) );
 322                                         html = div.innerHTML;
 323                                 }
 324
 325                                 return jQuery.clean([html.replace(/ jQuery\d+="(?:\d+|null)"/g, "").replace(/^\s*/, "")])[0];
 326                         } else
 327                                 return this.cloneNode(true);
 328                 });
 329
 330                 // Copy the events from the original to the clone
 331                 if ( events === true ) {
 332                         var orig = this.find("*").andSelf(), i = 0;
 333
 334                         ret.find("*").andSelf().each(function(){
 335                                 if ( this.nodeName !== orig[i].nodeName )
 336                                         return;
 337
 338                                 var events = jQuery.data( orig[i], "events" );
 339
 340                                 for ( var type in events ) {
 341                                         for ( var handler in events[ type ] ) {
 342                                                 jQuery.event.add( this, type, events[ type ][ handler ], events[ type ][ handler ].data );
 343                                         }
 344                                 }
 345
 346                                 i++;
 347                         });
 348                 }
 349
 350                 // Return the cloned set
 351                 return ret;
 352         },
 353
 354         filter: function( selector ) {
 355                 return this.pushStack(
 356                         jQuery.isFunction( selector ) &&
 357                         jQuery.grep(this, function(elem, i){
 358                                 return selector.call( elem, i );
 359                         }) ||
 360
 361                         jQuery.multiFilter( selector, jQuery.grep(this, function(elem){
 362                                 return elem.nodeType === 1;
 363                         }) ), "filter", selector );
 364         },
 365
 366         closest: function( selector ) {
 367                 var pos = jQuery.expr.match.POS.test( selector ) ? jQuery(selector) : null,
 368                         closer = 0;
 369
 370                 return this.map(function(){
 371                         var cur = this;
 372                         while ( cur && cur.ownerDocument ) {
 373                                 if ( pos ? pos.index(cur) > -1 : jQuery(cur).is(selector) ) {
 374                                         jQuery.data(cur, "closest", closer);
 375                                         return cur;
 376                                 }
 377                                 cur = cur.parentNode;
 378                                 closer++;
 379                         }
 380                 });
 381         },
 382
 383         not: function( selector ) {
 384                 if ( typeof selector === "string" )
 385                         // test special case where just one selector is passed in
 386                         if ( isSimple.test( selector ) )
 387                                 return this.pushStack( jQuery.multiFilter( selector, this, true ), "not", selector );
 388                         else
 389                                 selector = jQuery.multiFilter( selector, this );
 390
 391                 var isArrayLike = selector.length && selector[selector.length - 1] !== undefined && !selector.nodeType;
 392                 return this.filter(function() {
 393                         return isArrayLike ? jQuery.inArray( this, selector ) < 0 : this != selector;
 394                 });
 395         },
 396
 397         add: function( selector ) {
 398                 return this.pushStack( jQuery.unique( jQuery.merge(
 399                         this.get(),
 400                         typeof selector === "string" ?
 401                                 jQuery( selector ) :
 402                                 jQuery.makeArray( selector )
 403                 )));
 404         },
 405
 406         is: function( selector ) {
 407                 return !!selector && jQuery.multiFilter( selector, this ).length > 0;
 408         },
 409
 410         hasClass: function( selector ) {
 411                 return !!selector && this.is( "." + selector );
 412         },
 413
 414         val: function( value ) {
 415                 if ( value === undefined ) {
 416                         var elem = this[0];
 417
 418                         if ( elem ) {
 419                                 if( jQuery.nodeName( elem, 'option' ) )
 420                                         return (elem.attributes.value || {}).specified ? elem.value : elem.text;
 421
 422                                 // We need to handle select boxes special
 423                                 if ( jQuery.nodeName( elem, "select" ) ) {
 424                                         var index = elem.selectedIndex,
 425                                                 values = [],
 426                                                 options = elem.options,
 427                                                 one = elem.type == "select-one";
 428
 429                                         // Nothing was selected
 430                                         if ( index < 0 )
 431                                                 return null;
 432
 433                                         // Loop through all the selected options
 434                                         for ( var i = one ? index : 0, max = one ? index + 1 : options.length; i < max; i++ ) {
 435                                                 var option = options[ i ];
 436
 437                                                 if ( option.selected ) {
 438                                                         // Get the specifc value for the option
 439                                                         value = jQuery(option).val();
 440
 441                                                         // We don't need an array for one selects
 442                                                         if ( one )
 443                                                                 return value;
 444
 445                                                         // Multi-Selects return an array
 446                                                         values.push( value );
 447                                                 }
 448                                         }
 449
 450                                         return values;
 451                                 }
 452
 453                                 // Everything else, we just grab the value
 454                                 return (elem.value || "").replace(/\r/g, "");
 455
 456                         }
 457
 458                         return undefined;
 459                 }
 460
 461                 if ( typeof value === "number" )
 462                         value += '';
 463
 464                 return this.each(function(){
 465                         if ( this.nodeType != 1 )
 466                                 return;
 467
 468                         if ( jQuery.isArray(value) && /radio|checkbox/.test( this.type ) )
 469                                 this.checked = (jQuery.inArray(this.value, value) >= 0 ||
 470                                         jQuery.inArray(this.name, value) >= 0);
 471
 472                         else if ( jQuery.nodeName( this, "select" ) ) {
 473                                 var values = jQuery.makeArray(value);
 474
 475                                 jQuery( "option", this ).each(function(){
 476                                         this.selected = (jQuery.inArray( this.value, values ) >= 0 ||
 477                                                 jQuery.inArray( this.text, values ) >= 0);
 478                                 });
 479
 480                                 if ( !values.length )
 481                                         this.selectedIndex = -1;
 482
 483                         } else
 484                                 this.value = value;
 485                 });
 486         },
 487
 488         html: function( value ) {
 489                 return value === undefined ?
 490                         (this[0] ?
 491                                 this[0].innerHTML.replace(/ jQuery\d+="(?:\d+|null)"/g, "") :
 492                                 null) :
 493                         this.empty().append( value );
 494         },
 495
 496         replaceWith: function( value ) {
 497                 return this.after( value ).remove();
 498         },
 499
 500         eq: function( i ) {
 501                 return this.slice( i, +i + 1 );
 502         },
 503
 504         slice: function() {
 505                 return this.pushStack( Array.prototype.slice.apply( this, arguments ),
 506                         "slice", Array.prototype.slice.call(arguments).join(",") );
 507         },
 508
 509         map: function( callback ) {
 510                 return this.pushStack( jQuery.map(this, function(elem, i){
 511                         return callback.call( elem, i, elem );
 512                 }));
 513         },
 514
 515         andSelf: function() {
 516                 return this.add( this.prevObject );
 517         },
 518
 519         domManip: function( args, table, callback ) {
 520                 if ( this[0] ) {
 521                         var fragment = (this[0].ownerDocument || this[0]).createDocumentFragment(),
 522                                 scripts = jQuery.clean( args, (this[0].ownerDocument || this[0]), fragment ),
 523                                 first = fragment.firstChild;
 524
 525                         if ( first )
 526                                 for ( var i = 0, l = this.length; i < l; i++ )
 527                                         callback.call( root(this[i], first), this.length > 1 || i > 0 ?
 528                                                         fragment.cloneNode(true) : fragment );
 529
 530                         if ( scripts )
 531                                 jQuery.each( scripts, evalScript );
 532                 }
 533
 534                 return this;
 535
 536                 function root( elem, cur ) {
 537                         return table && jQuery.nodeName(elem, "table") && jQuery.nodeName(cur, "tr") ?
 538                                 (elem.getElementsByTagName("tbody")[0] ||
 539                                 elem.appendChild(elem.ownerDocument.createElement("tbody"))) :
 540                                 elem;
 541                 }
 542         }
 543 };
 544
 545 // Give the init function the jQuery prototype for later instantiation
 546 jQuery.fn.init.prototype = jQuery.fn;
 547
 548 function evalScript( i, elem ) {
 549         if ( elem.src )
 550                 jQuery.ajax({
 551                         url: elem.src,
 552                         async: false,
 553                         dataType: "script"
 554                 });
 555
 556         else
 557                 jQuery.globalEval( elem.text || elem.textContent || elem.innerHTML || "" );
 558
 559         if ( elem.parentNode )
 560                 elem.parentNode.removeChild( elem );
 561 }
 562
 563 function now(){
 564         return +new Date;
 565 }
 566
 567 jQuery.extend = jQuery.fn.extend = function() {
 568         // copy reference to target object
 569         var target = arguments[0] || {}, i = 1, length = arguments.length, deep = false, options;
 570
 571         // Handle a deep copy situation
 572         if ( typeof target === "boolean" ) {
 573                 deep = target;
 574                 target = arguments[1] || {};
 575                 // skip the boolean and the target
 576                 i = 2;
 577         }
 578
 579         // Handle case when target is a string or something (possible in deep copy)
 580         if ( typeof target !== "object" && !jQuery.isFunction(target) )
 581                 target = {};
 582
 583         // extend jQuery itself if only one argument is passed
 584         if ( length == i ) {
 585                 target = this;
 586                 --i;
 587         }
 588
 589         for ( ; i < length; i++ )
 590                 // Only deal with non-null/undefined values
 591                 if ( (options = arguments[ i ]) != null )
 592                         // Extend the base object
 593                         for ( var name in options ) {
 594                                 var src = target[ name ], copy = options[ name ];
 595
 596                                 // Prevent never-ending loop
 597                                 if ( target === copy )
 598                                         continue;
 599
 600                                 // Recurse if we're merging object values
 601                                 if ( deep && copy && typeof copy === "object" && !copy.nodeType )
 602                                         target[ name ] = jQuery.extend( deep,
 603                                                 // Never move original objects, clone them
 604                                                 src || ( copy.length != null ? [ ] : { } )
 605                                         , copy );
 606
 607                                 // Don't bring in undefined values
 608                                 else if ( copy !== undefined )
 609                                         target[ name ] = copy;
 610
 611                         }
 612
 613         // Return the modified object
 614         return target;
 615 };
 616
 617 // exclude the following css properties to add px
 618 var     exclude = /z-?index|font-?weight|opacity|zoom|line-?height/i,
 619         // cache defaultView
 620         defaultView = document.defaultView || {},
 621         toString = Object.prototype.toString;
 622
 623 jQuery.extend({
 624         noConflict: function( deep ) {
 625                 window.$ = _$;
 626
 627                 if ( deep )
 628                         window.jQuery = _jQuery;
 629
 630                 return jQuery;
 631         },
 632
 633         // See test/unit/core.js for details concerning isFunction.
 634         // Since version 1.3, DOM methods and functions like alert
 635         // aren't supported. They return false on IE (#2968).
 636         isFunction: function( obj ) {
 637                 return toString.call(obj) === "[object Function]";
 638         },
 639
 640         isArray: function( obj ) {
 641                 return toString.call(obj) === "[object Array]";
 642         },
 643
 644         // check if an element is in a (or is an) XML document
 645         isXMLDoc: function( elem ) {
 646                 return elem.nodeType === 9 && elem.documentElement.nodeName !== "HTML" ||
 647                         !!elem.ownerDocument && jQuery.isXMLDoc( elem.ownerDocument );
 648         },
 649
 650         // Evalulates a script in a global context
 651         globalEval: function( data ) {
 652                 if ( data && /\S/.test(data) ) {
 653                         // Inspired by code by Andrea Giammarchi
 654                         // http://webreflection.blogspot.com/2007/08/global-scope-evaluation-and-dom.html
 655                         var head = document.getElementsByTagName("head")[0] || document.documentElement,
 656                                 script = document.createElement("script");
 657
 658                         script.type = "text/javascript";
 659                         if ( jQuery.support.scriptEval )
 660                                 script.appendChild( document.createTextNode( data ) );
 661                         else
 662                                 script.text = data;
 663
 664                         // Use insertBefore instead of appendChild  to circumvent an IE6 bug.
 665                         // This arises when a base node is used (#2709).
 666                         head.insertBefore( script, head.firstChild );
 667                         head.removeChild( script );
 668                 }
 669         },
 670
 671         nodeName: function( elem, name ) {
 672                 return elem.nodeName && elem.nodeName.toUpperCase() == name.toUpperCase();
 673         },
 674
 675         // args is for internal usage only
 676         each: function( object, callback, args ) {
 677                 var name, i = 0, length = object.length;
 678
 679                 if ( args ) {
 680                         if ( length === undefined ) {
 681                                 for ( name in object )
 682                                         if ( callback.apply( object[ name ], args ) === false )
 683                                                 break;
 684                         } else
 685                                 for ( ; i < length; )
 686                                         if ( callback.apply( object[ i++ ], args ) === false )
 687                                                 break;
 688
 689                 // A special, fast, case for the most common use of each
 690                 } else {
 691                         if ( length === undefined ) {
 692                                 for ( name in object )
 693                                         if ( callback.call( object[ name ], name, object[ name ] ) === false )
 694                                                 break;
 695                         } else
 696                                 for ( var value = object[0];
 697                                         i < length && callback.call( value, i, value ) !== false; value = object[++i] ){}
 698                 }
 699
 700                 return object;
 701         },
 702
 703         prop: function( elem, value, type, i, name ) {
 704                 // Handle executable functions
 705                 if ( jQuery.isFunction( value ) )
 706                         value = value.call( elem, i );
 707
 708                 // Handle passing in a number to a CSS property
 709                 return typeof value === "number" && type == "curCSS" && !exclude.test( name ) ?
 710                         value + "px" :
 711                         value;
 712         },
 713
 714         className: {
 715                 // internal only, use addClass("class")
 716                 add: function( elem, classNames ) {
 717                         jQuery.each((classNames || "").split(/\s+/), function(i, className){
 718                                 if ( elem.nodeType == 1 && !jQuery.className.has( elem.className, className ) )
 719                                         elem.className += (elem.className ? " " : "") + className;
 720                         });
 721                 },
 722
 723                 // internal only, use removeClass("class")
 724                 remove: function( elem, classNames ) {
 725                         if (elem.nodeType == 1)
 726                                 elem.className = classNames !== undefined ?
 727                                         jQuery.grep(elem.className.split(/\s+/), function(className){
 728                                                 return !jQuery.className.has( classNames, className );
 729                                         }).join(" ") :
 730                                         "";
 731                 },
 732
 733                 // internal only, use hasClass("class")
 734                 has: function( elem, className ) {
 735                         return elem && jQuery.inArray( className, (elem.className || elem).toString().split(/\s+/) ) > -1;
 736                 }
 737         },
 738
 739         // A method for quickly swapping in/out CSS properties to get correct calculations
 740         swap: function( elem, options, callback ) {
 741                 var old = {};
 742                 // Remember the old values, and insert the new ones
 743                 for ( var name in options ) {
 744                         old[ name ] = elem.style[ name ];
 745                         elem.style[ name ] = options[ name ];
 746                 }
 747
 748                 callback.call( elem );
 749
 750                 // Revert the old values
 751                 for ( var name in options )
 752                         elem.style[ name ] = old[ name ];
 753         },
 754
 755         css: function( elem, name, force, extra ) {
 756                 if ( name == "width" || name == "height" ) {
 757                         var val, props = { position: "absolute", visibility: "hidden", display:"block" }, which = name == "width" ? [ "Left", "Right" ] : [ "Top", "Bottom" ];
 758
 759                         function getWH() {
 760                                 val = name == "width" ? elem.offsetWidth : elem.offsetHeight;
 761
 762                                 if ( extra === "border" )
 763                                         return;
 764
 765                                 jQuery.each( which, function() {
 766                                         if ( !extra )
 767                                                 val -= parseFloat(jQuery.curCSS( elem, "padding" + this, true)) || 0;
 768                                         if ( extra === "margin" )
 769                                                 val += parseFloat(jQuery.curCSS( elem, "margin" + this, true)) || 0;
 770                                         else
 771                                                 val -= parseFloat(jQuery.curCSS( elem, "border" + this + "Width", true)) || 0;
 772                                 });
 773                         }
 774
 775                         if ( elem.offsetWidth !== 0 )
 776                                 getWH();
 777                         else
 778                                 jQuery.swap( elem, props, getWH );
 779
 780                         return Math.max(0, Math.round(val));
 781                 }
 782
 783                 return jQuery.curCSS( elem, name, force );
 784         },
 785
 786         curCSS: function( elem, name, force ) {
 787                 var ret, style = elem.style;
 788
 789                 // We need to handle opacity special in IE
 790                 if ( name == "opacity" && !jQuery.support.opacity ) {
 791                         ret = jQuery.attr( style, "opacity" );
 792
 793                         return ret == "" ?
 794                                 "1" :
 795                                 ret;
 796                 }
 797
 798                 // Make sure we're using the right name for getting the float value
 799                 if ( name.match( /float/i ) )
 800                         name = styleFloat;
 801
 802                 if ( !force && style && style[ name ] )
 803                         ret = style[ name ];
 804
 805                 else if ( defaultView.getComputedStyle ) {
 806
 807                         // Only "float" is needed here
 808                         if ( name.match( /float/i ) )
 809                                 name = "float";
 810
 811                         name = name.replace( /([A-Z])/g, "-$1" ).toLowerCase();
 812
 813                         var computedStyle = defaultView.getComputedStyle( elem, null );
 814
 815                         if ( computedStyle )
 816                                 ret = computedStyle.getPropertyValue( name );
 817
 818                         // We should always get a number back from opacity
 819                         if ( name == "opacity" && ret == "" )
 820                                 ret = "1";
 821
 822                 } else if ( elem.currentStyle ) {
 823                         var camelCase = name.replace(/\-(\w)/g, function(all, letter){
 824                                 return letter.toUpperCase();
 825                         });
 826
 827                         ret = elem.currentStyle[ name ] || elem.currentStyle[ camelCase ];
 828
 829                         // From the awesome hack by Dean Edwards
 830                         // http://erik.eae.net/archives/2007/07/27/18.54.15/#comment-102291
 831
 832                         // If we're not dealing with a regular pixel number
 833                         // but a number that has a weird ending, we need to convert it to pixels
 834                         if ( !/^\d+(px)?$/i.test( ret ) && /^\d/.test( ret ) ) {
 835                                 // Remember the original values
 836                                 var left = style.left, rsLeft = elem.runtimeStyle.left;
 837
 838                                 // Put in the new values to get a computed value out
 839                                 elem.runtimeStyle.left = elem.currentStyle.left;
 840                                 style.left = ret || 0;
 841                                 ret = style.pixelLeft + "px";
 842
 843                                 // Revert the changed values
 844                                 style.left = left;
 845                                 elem.runtimeStyle.left = rsLeft;
 846                         }
 847                 }
 848
 849                 return ret;
 850         },
 851
 852         clean: function( elems, context, fragment ) {
 853                 context = context || document;
 854
 855                 // !context.createElement fails in IE with an error but returns typeof 'object'
 856                 if ( typeof context.createElement === "undefined" )
 857                         context = context.ownerDocument || context[0] && context[0].ownerDocument || document;
 858
 859                 // If a single string is passed in and it's a single tag
 860                 // just do a createElement and skip the rest
 861                 if ( !fragment && elems.length === 1 && typeof elems[0] === "string" ) {
 862                         var match = /^<(\w+)\s*\/?>$/.exec(elems[0]);
 863                         if ( match )
 864                                 return [ context.createElement( match[1] ) ];
 865                 }
 866
 867                 var ret = [], scripts = [], div = context.createElement("div");
 868
 869                 jQuery.each(elems, function(i, elem){
 870                         if ( typeof elem === "number" )
 871                                 elem += '';
 872
 873                         if ( !elem )
 874                                 return;
 875
 876                         // Convert html string into DOM nodes
 877                         if ( typeof elem === "string" ) {
 878                                 // Fix "XHTML"-style tags in all browsers
 879                                 elem = elem.replace(/(<(\w+)[^>]*?)\/>/g, function(all, front, tag){
 880                                         return tag.match(/^(abbr|br|col|img|input|link|meta|param|hr|area|embed)$/i) ?
 881                                                 all :
 882                                                 front + "></" + tag + ">";
 883                                 });
 884
 885                                 // Trim whitespace, otherwise indexOf won't work as expected
 886                                 var tags = elem.replace(/^\s+/, "").substring(0, 10).toLowerCase();
 887
 888                                 var wrap =
 889                                         // option or optgroup
 890                                         !tags.indexOf("<opt") &&
 891                                         [ 1, "<select multiple='multiple'>", "</select>" ] ||
 892
 893                                         !tags.indexOf("<leg") &&
 894                                         [ 1, "<fieldset>", "</fieldset>" ] ||
 895
 896                                         tags.match(/^<(thead|tbody|tfoot|colg|cap)/) &&
 897                                         [ 1, "<table>", "</table>" ] ||
 898
 899                                         !tags.indexOf("<tr") &&
 900                                         [ 2, "<table><tbody>", "</tbody></table>" ] ||
 901
 902                                         // <thead> matched above
 903                                         (!tags.indexOf("<td") || !tags.indexOf("<th")) &&
 904                                         [ 3, "<table><tbody><tr>", "</tr></tbody></table>" ] ||
 905
 906                                         !tags.indexOf("<col") &&
 907                                         [ 2, "<table><tbody></tbody><colgroup>", "</colgroup></table>" ] ||
 908
 909                                         // IE can't serialize <link> and <script> tags normally
 910                                         !jQuery.support.htmlSerialize &&
 911                                         [ 1, "div<div>", "</div>" ] ||
 912
 913                                         [ 0, "", "" ];
 914
 915                                 // Go to html and back, then peel off extra wrappers
 916                                 div.innerHTML = wrap[1] + elem + wrap[2];
 917
 918                                 // Move to the right depth
 919                                 while ( wrap[0]-- )
 920                                         div = div.lastChild;
 921
 922                                 // Remove IE's autoinserted <tbody> from table fragments
 923                                 if ( !jQuery.support.tbody ) {
 924
 925                                         // String was a <table>, *may* have spurious <tbody>
 926                                         var hasBody = /<tbody/i.test(elem),
 927                                                 tbody = !tags.indexOf("<table") && !hasBody ?
 928                                                         div.firstChild && div.firstChild.childNodes :
 929
 930                                                 // String was a bare <thead> or <tfoot>
 931                                                 wrap[1] == "<table>" && !hasBody ?
 932                                                         div.childNodes :
 933                                                         [];
 934
 935                                         for ( var j = tbody.length - 1; j >= 0 ; --j )
 936                                                 if ( jQuery.nodeName( tbody[ j ], "tbody" ) && !tbody[ j ].childNodes.length )
 937                                                         tbody[ j ].parentNode.removeChild( tbody[ j ] );
 938
 939                                         }
 940
 941                                 // IE completely kills leading whitespace when innerHTML is used
 942                                 if ( !jQuery.support.leadingWhitespace && /^\s/.test( elem ) )
 943                                         div.insertBefore( context.createTextNode( elem.match(/^\s*/)[0] ), div.firstChild );
 944
 945                                 elem = jQuery.makeArray( div.childNodes );
 946                         }
 947
 948                         if ( elem.nodeType )
 949                                 ret.push( elem );
 950                         else
 951                                 ret = jQuery.merge( ret, elem );
 952
 953                 });
 954
 955                 if ( fragment ) {
 956                         for ( var i = 0; ret[i]; i++ ) {
 957                                 if ( jQuery.nodeName( ret[i], "script" ) && (!ret[i].type || ret[i].type.toLowerCase() === "text/javascript") ) {
 958                                         scripts.push( ret[i].parentNode ? ret[i].parentNode.removeChild( ret[i] ) : ret[i] );
 959                                 } else {
 960                                         if ( ret[i].nodeType === 1 )
 961                                                 ret.splice.apply( ret, [i + 1, 0].concat(jQuery.makeArray(ret[i].getElementsByTagName("script"))) );
 962                                         fragment.appendChild( ret[i] );
 963                                 }
 964                         }
 965
 966                         return scripts;
 967                 }
 968
 969                 return ret;
 970         },
 971
 972         attr: function( elem, name, value ) {
 973                 // don't set attributes on text and comment nodes
 974                 if (!elem || elem.nodeType == 3 || elem.nodeType == 8)
 975                         return undefined;
 976
 977                 var notxml = !jQuery.isXMLDoc( elem ),
 978                         // Whether we are setting (or getting)
 979                         set = value !== undefined;
 980
 981                 // Try to normalize/fix the name
 982                 name = notxml && jQuery.props[ name ] || name;
 983
 984                 // Only do all the following if this is a node (faster for style)
 985                 // IE elem.getAttribute passes even for style
 986                 if ( elem.tagName ) {
 987
 988                         // These attributes require special treatment
 989                         var special = /href|src|style/.test( name );
 990
 991                         // Safari mis-reports the default selected property of a hidden option
 992                         // Accessing the parent's selectedIndex property fixes it
 993                         if ( name == "selected" && elem.parentNode )
 994                                 elem.parentNode.selectedIndex;
 995
 996                         // If applicable, access the attribute via the DOM 0 way
 997                         if ( name in elem && notxml && !special ) {
 998                                 if ( set ){
 999                                         // We can't allow the type property to be changed (since it causes problems in IE)
1000                                         if ( name == "type" && jQuery.nodeName( elem, "input" ) && elem.parentNode )
1001                                                 throw "type property can't be changed";
1002
1003                                         elem[ name ] = value;
1004                                 }
1005
1006                                 // browsers index elements by id/name on forms, give priority to attributes.
1007                                 if( jQuery.nodeName( elem, "form" ) && elem.getAttributeNode(name) )
1008                                         return elem.getAttributeNode( name ).nodeValue;
1009
1010                                 // elem.tabIndex doesn't always return the correct value when it hasn't been explicitly set
1011                                 // http://fluidproject.org/blog/2008/01/09/getting-setting-and-removing-tabindex-values-with-javascript/
1012                                 if ( name == "tabIndex" ) {
1013                                         var attributeNode = elem.getAttributeNode( "tabIndex" );
1014                                         return attributeNode && attributeNode.specified
1015                                                 ? attributeNode.value
1016                                                 : elem.nodeName.match(/(button|input|object|select|textarea)/i)
1017                                                         ? 0
1018                                                         : elem.nodeName.match(/^(a|area)$/i) && elem.href
1019                                                                 ? 0
1020                                                                 : undefined;
1021                                 }
1022
1023                                 return elem[ name ];
1024                         }
1025
1026                         if ( !jQuery.support.style && notxml &&  name == "style" )
1027                                 return jQuery.attr( elem.style, "cssText", value );
1028
1029                         if ( set )
1030                                 // convert the value to a string (all browsers do this but IE) see #1070
1031                                 elem.setAttribute( name, "" + value );
1032
1033                         var attr = !jQuery.support.hrefNormalized && notxml && special
1034                                         // Some attributes require a special call on IE
1035                                         ? elem.getAttribute( name, 2 )
1036                                         : elem.getAttribute( name );
1037
1038                         // Non-existent attributes return null, we normalize to undefined
1039                         return attr === null ? undefined : attr;
1040                 }
1041
1042                 // elem is actually elem.style ... set the style
1043
1044                 // IE uses filters for opacity
1045                 if ( !jQuery.support.opacity && name == "opacity" ) {
1046                         if ( set ) {
1047                                 // IE has trouble with opacity if it does not have layout
1048                                 // Force it by setting the zoom level
1049                                 elem.zoom = 1;
1050
1051                                 // Set the alpha filter to set the opacity
1052                                 elem.filter = (elem.filter || "").replace( /alpha\([^)]*\)/, "" ) +
1053                                         (parseInt( value ) + '' == "NaN" ? "" : "alpha(opacity=" + value * 100 + ")");
1054                         }
1055
1056                         return elem.filter && elem.filter.indexOf("opacity=") >= 0 ?
1057                                 (parseFloat( elem.filter.match(/opacity=([^)]*)/)[1] ) / 100) + '':
1058                                 "";
1059                 }
1060
1061                 name = name.replace(/-([a-z])/ig, function(all, letter){
1062                         return letter.toUpperCase();
1063                 });
1064
1065                 if ( set )
1066                         elem[ name ] = value;
1067
1068                 return elem[ name ];
1069         },
1070
1071         trim: function( text ) {
1072                 return (text || "").replace( /^\s+|\s+$/g, "" );
1073         },
1074
1075         makeArray: function( array ) {
1076                 var ret = [];
1077
1078                 if( array != null ){
1079                         var i = array.length;
1080                         // The window, strings (and functions) also have 'length'
1081                         if( i == null || typeof array === "string" || jQuery.isFunction(array) || array.setInterval )
1082                                 ret[0] = array;
1083                         else
1084                                 while( i )
1085                                         ret[--i] = array[i];
1086                 }
1087
1088                 return ret;
1089         },
1090
1091         inArray: function( elem, array ) {
1092                 for ( var i = 0, length = array.length; i < length; i++ )
1093                 // Use === because on IE, window == document
1094                         if ( array[ i ] === elem )
1095                                 return i;
1096
1097                 return -1;
1098         },
1099
1100         merge: function( first, second ) {
1101                 // We have to loop this way because IE & Opera overwrite the length
1102                 // expando of getElementsByTagName
1103                 var i = 0, elem, pos = first.length;
1104                 // Also, we need to make sure that the correct elements are being returned
1105                 // (IE returns comment nodes in a '*' query)
1106                 if ( !jQuery.support.getAll ) {
1107                         while ( (elem = second[ i++ ]) != null )
1108                                 if ( elem.nodeType != 8 )
1109                                         first[ pos++ ] = elem;
1110
1111                 } else
1112                         while ( (elem = second[ i++ ]) != null )
1113                                 first[ pos++ ] = elem;
1114
1115                 return first;
1116         },
1117
1118         unique: function( array ) {
1119                 var ret = [], done = {};
1120
1121                 try {
1122
1123                         for ( var i = 0, length = array.length; i < length; i++ ) {
1124                                 var id = jQuery.data( array[ i ] );
1125
1126                                 if ( !done[ id ] ) {
1127                                         done[ id ] = true;
1128                                         ret.push( array[ i ] );
1129                                 }
1130                         }
1131
1132                 } catch( e ) {
1133                         ret = array;
1134                 }
1135
1136                 return ret;
1137         },
1138
1139         grep: function( elems, callback, inv ) {
1140                 var ret = [];
1141
1142                 // Go through the array, only saving the items
1143                 // that pass the validator function
1144                 for ( var i = 0, length = elems.length; i < length; i++ )
1145                         if ( !inv != !callback( elems[ i ], i ) )
1146                                 ret.push( elems[ i ] );
1147
1148                 return ret;
1149         },
1150
1151         map: function( elems, callback ) {
1152                 var ret = [];
1153
1154                 // Go through the array, translating each of the items to their
1155                 // new value (or values).
1156                 for ( var i = 0, length = elems.length; i < length; i++ ) {
1157                         var value = callback( elems[ i ], i );
1158
1159                         if ( value != null )
1160                                 ret[ ret.length ] = value;
1161                 }
1162
1163                 return ret.concat.apply( [], ret );
1164         }
1165 });
1166
1167 // All jQuery objects should point back to these
1168 var rootjQuery = jQuery(document);
1169
1170 // Use of jQuery.browser is deprecated.
1171 // It's included for backwards compatibility and plugins,
1172 // although they should work to migrate away.
1173
1174 var userAgent = navigator.userAgent.toLowerCase();
1175
1176 // Figure out what browser is being used
1177 jQuery.browser = {
1178         version: (userAgent.match( /.+(?:rv|it|ra|ie)[\/: ]([\d.]+)/ ) || [0,'0'])[1],
1179         safari: /webkit/.test( userAgent ),
1180         opera: /opera/.test( userAgent ),
1181         msie: /msie/.test( userAgent ) && !/opera/.test( userAgent ),
1182         mozilla: /mozilla/.test( userAgent ) && !/(compatible|webkit)/.test( userAgent )
1183 };
1184
1185 jQuery.each({
1186         parent: function(elem){return elem.parentNode;},
1187         parents: function(elem){return jQuery.dir(elem,"parentNode");},
1188         next: function(elem){return jQuery.nth(elem,2,"nextSibling");},
1189         prev: function(elem){return jQuery.nth(elem,2,"previousSibling");},
1190         nextAll: function(elem){return jQuery.dir(elem,"nextSibling");},
1191         prevAll: function(elem){return jQuery.dir(elem,"previousSibling");},
1192         siblings: function(elem){return jQuery.sibling(elem.parentNode.firstChild,elem);},
1193         children: function(elem){return jQuery.sibling(elem.firstChild);},
1194         contents: function(elem){return jQuery.nodeName(elem,"iframe")?elem.contentDocument||elem.contentWindow.document:jQuery.makeArray(elem.childNodes);}
1195 }, function(name, fn){
1196         jQuery.fn[ name ] = function( selector ) {
1197                 var ret = jQuery.map( this, fn );
1198
1199                 if ( selector && typeof selector == "string" )
1200                         ret = jQuery.multiFilter( selector, ret );
1201
1202                 return this.pushStack( jQuery.unique( ret ), name, selector );
1203         };
1204 });
1205
1206 jQuery.each({
1207         appendTo: "append",
1208         prependTo: "prepend",
1209         insertBefore: "before",
1210         insertAfter: "after",
1211         replaceAll: "replaceWith"
1212 }, function(name, original){
1213         jQuery.fn[ name ] = function( selector ) {
1214                 var ret = [], insert = jQuery( selector );
1215
1216                 for ( var i = 0, l = insert.length; i < l; i++ ) {
1217                         var elems = (i > 0 ? this.clone(true) : this).get();
1218                         jQuery.fn[ original ].apply( jQuery(insert[i]), elems );
1219                         ret = ret.concat( elems );
1220                 }
1221
1222                 return this.pushStack( ret, name, selector );
1223         };
1224 });
1225
1226 jQuery.each({
1227         removeAttr: function( name ) {
1228                 jQuery.attr( this, name, "" );
1229                 if (this.nodeType == 1)
1230                         this.removeAttribute( name );
1231         },
1232
1233         addClass: function( classNames ) {
1234                 jQuery.className.add( this, classNames );
1235         },
1236
1237         removeClass: function( classNames ) {
1238                 jQuery.className.remove( this, classNames );
1239         },
1240
1241         toggleClass: function( classNames, state ) {
1242                 if( typeof state !== "boolean" )
1243                         state = !jQuery.className.has( this, classNames );
1244                 jQuery.className[ state ? "add" : "remove" ]( this, classNames );
1245         },
1246
1247         remove: function( selector ) {
1248                 if ( !selector || jQuery.multiFilter( selector, [ this ] ).length ) {
1249                         if ( this.nodeType === 1 ) {
1250                                 cleanData( this.getElementsByTagName("*") );
1251                                 cleanData( [this] );
1252                         }
1253
1254                         if ( this.parentNode ) {
1255                                 this.parentNode.removeChild( this );
1256                         }
1257                 }
1258         },
1259
1260         empty: function() {
1261                 // Remove element nodes and prevent memory leaks
1262                 if ( this.nodeType === 1 ) {
1263                         cleanData( this.getElementsByTagName("*") );
1264                 }
1265
1266                 // Remove any remaining nodes
1267                 while ( this.firstChild ) {
1268                         this.removeChild( this.firstChild );
1269                 }
1270         }
1271 }, function(name, fn){
1272         jQuery.fn[ name ] = function(){
1273                 return this.each( fn, arguments );
1274         };
1275 });
1276
1277 function cleanData( elems ) {
1278         for ( var i = 0, l = elems.length; i < l; i++ ) {
1279                 var id = elems[i][expando];
1280                 if ( id ) {
1281                         delete jQuery.cache[ id ];
1282                 }
1283         }
1284 }
1285
1286 // Helper function used by the dimensions and offset modules
1287 function num(elem, prop) {
1288         return elem[0] && parseInt( jQuery.curCSS(elem[0], prop, true), 10 ) || 0;
1289 }