src/core.js

   1 /*
   2  * jQuery @VERSION - New Wave Javascript
   3  *
   4  * Copyright (c) 2008 John Resig (jquery.com)
   5  * Dual licensed under the MIT (MIT-LICENSE.txt)
   6  * and GPL (GPL-LICENSE.txt) licenses.
   7  *
   8  * $Date$
   9  * $Rev$
  10  */
  11
  12 // Map over jQuery in case of overwrite
  13 var _jQuery = window.jQuery,
  14 // Map over the $ in case of overwrite
  15         _$ = window.$;
  16
  17 var jQuery = window.jQuery = window.$ = function( selector, context ) {
  18         // The jQuery object is actually just the init constructor 'enhanced'
  19         return new jQuery.fn.init( selector, context );
  20 };
  21
  22 // A simple way to check for HTML strings or ID strings
  23 // (both of which we optimize for)
  24 var quickExpr = /^[^<]*(<(.|\s)+>)[^>]*$|^#([\w-]+)$/,
  25
  26 // Is it a simple selector
  27         isSimple = /^.[^:#\[\.]*$/,
  28
  29 // Will speed up references to undefined, and allows munging its name.
  30         undefined;
  31
  32 jQuery.fn = jQuery.prototype = {
  33         init: function( selector, context ) {
  34                 // Make sure that a selection was provided
  35                 selector = selector || document;
  36
  37                 // Handle $(DOMElement)
  38                 if ( selector.nodeType ) {
  39                         this[0] = selector;
  40                         this.length = 1;
  41                         this.context = selector;
  42                         return this;
  43                 }
  44                 // Handle HTML strings
  45                 if ( typeof selector === "string" ) {
  46                         // Are we dealing with HTML string or an ID?
  47                         var match = quickExpr.exec( selector );
  48
  49                         // Verify a match, and that no context was specified for #id
  50                         if ( match && (match[1] || !context) ) {
  51
  52                                 // HANDLE: $(html) -> $(array)
  53                                 if ( match[1] )
  54                                         selector = jQuery.clean( [ match[1] ], context );
  55
  56                                 // HANDLE: $("#id")
  57                                 else {
  58                                         var elem = document.getElementById( match[3] );
  59
  60                                         // Make sure an element was located
  61                                         if ( elem ){
  62                                                 // Handle the case where IE and Opera return items
  63                                                 // by name instead of ID
  64                                                 if ( elem.id != match[3] )
  65                                                         return jQuery().find( selector );
  66
  67                                                 // Otherwise, we inject the element directly into the jQuery object
  68                                                 var ret = jQuery( elem );
  69                                                 ret.context = document;
  70                                                 ret.selector = selector;
  71                                                 return ret;
  72                                         }
  73                                         selector = [];
  74                                 }
  75
  76                         // HANDLE: $(expr, [context])
  77                         // (which is just equivalent to: $(content).find(expr)
  78                         } else
  79                                 return jQuery( context ).find( selector );
  80
  81                 // HANDLE: $(function)
  82                 // Shortcut for document ready
  83                 } else if ( jQuery.isFunction( selector ) )
  84                         return jQuery( document )[ jQuery.fn.ready ? "ready" : "load" ]( selector );
  85
  86                 return this.setArray(jQuery.makeArray(selector));
  87         },
  88
  89         // Start with an empty selector
  90         selector: "",
  91
  92         // The current version of jQuery being used
  93         jquery: "@VERSION",
  94
  95         // The number of elements contained in the matched element set
  96         size: function() {
  97                 return this.length;
  98         },
  99
 100         // Get the Nth element in the matched element set OR
 101         // Get the whole matched element set as a clean array
 102         get: function( num ) {
 103                 return num === undefined ?
 104
 105                         // Return a 'clean' array
 106                         jQuery.makeArray( this ) :
 107
 108                         // Return just the object
 109                         this[ num ];
 110         },
 111
 112         // Take an array of elements and push it onto the stack
 113         // (returning the new matched element set)
 114         pushStack: function( elems, name, selector ) {
 115                 // Build a new jQuery matched element set
 116                 var ret = jQuery( elems );
 117
 118                 // Add the old object onto the stack (as a reference)
 119                 ret.prevObject = this;
 120
 121                 ret.context = this.context;
 122
 123                 if ( name === "find" )
 124                         ret.selector = this.selector + (this.selector ? " " : "") + selector;
 125                 else if ( name )
 126                         ret.selector = this.selector + "." + name + "(" + selector + ")";
 127
 128                 // Return the newly-formed element set
 129                 return ret;
 130         },
 131
 132         // Force the current matched set of elements to become
 133         // the specified array of elements (destroying the stack in the process)
 134         // You should use pushStack() in order to do this, but maintain the stack
 135         setArray: function( elems ) {
 136                 // Resetting the length to 0, then using the native Array push
 137                 // is a super-fast way to populate an object with array-like properties
 138                 this.length = 0;
 139                 Array.prototype.push.apply( this, elems );
 140
 141                 return this;
 142         },
 143
 144         // Execute a callback for every element in the matched set.
 145         // (You can seed the arguments with an array of args, but this is
 146         // only used internally.)
 147         each: function( callback, args ) {
 148                 return jQuery.each( this, callback, args );
 149         },
 150
 151         // Determine the position of an element within
 152         // the matched set of elements
 153         index: function( elem ) {
 154                 var ret = -1;
 155
 156                 // Locate the position of the desired element
 157                 return jQuery.inArray(
 158                         // If it receives a jQuery object, the first element is used
 159                         elem && elem.jquery ? elem[0] : elem
 160                 , this );
 161         },
 162
 163         attr: function( name, value, type ) {
 164                 var options = name;
 165
 166                 // Look for the case where we're accessing a style value
 167                 if ( typeof name === "string" )
 168                         if ( value === undefined )
 169                                 return this[0] && jQuery[ type || "attr" ]( this[0], name );
 170
 171                         else {
 172                                 options = {};
 173                                 options[ name ] = value;
 174                         }
 175
 176                 // Check to see if we're setting style values
 177                 return this.each(function(i){
 178                         // Set all the styles
 179                         for ( name in options )
 180                                 jQuery.attr(
 181                                         type ?
 182                                                 this.style :
 183                                                 this,
 184                                         name, jQuery.prop( this, options[ name ], type, i, name )
 185                                 );
 186                 });
 187         },
 188
 189         css: function( key, value ) {
 190                 // ignore negative width and height values
 191                 if ( (key == 'width' || key == 'height') && parseFloat(value) < 0 )
 192                         value = undefined;
 193                 return this.attr( key, value, "curCSS" );
 194         },
 195
 196         text: function( text ) {
 197                 if ( typeof text !== "object" && text != null )
 198                         return this.empty().append( (this[0] && this[0].ownerDocument || document).createTextNode( text ) );
 199
 200                 var ret = "";
 201
 202                 jQuery.each( text || this, function(){
 203                         jQuery.each( this.childNodes, function(){
 204                                 if ( this.nodeType != 8 )
 205                                         ret += this.nodeType != 1 ?
 206                                                 this.nodeValue :
 207                                                 jQuery.fn.text( [ this ] );
 208                         });
 209                 });
 210
 211                 return ret;
 212         },
 213
 214         wrapAll: function( html ) {
 215                 if ( this[0] )
 216                         // The elements to wrap the target around
 217                         jQuery( html, this[0].ownerDocument )
 218                                 .clone()
 219                                 .insertBefore( this[0] )
 220                                 .map(function(){
 221                                         var elem = this;
 222
 223                                         while ( elem.firstChild )
 224                                                 elem = elem.firstChild;
 225
 226                                         return elem;
 227                                 })
 228                                 .append(this);
 229
 230                 return this;
 231         },
 232
 233         wrapInner: function( html ) {
 234                 return this.each(function(){
 235                         jQuery( this ).contents().wrapAll( html );
 236                 });
 237         },
 238
 239         wrap: function( html ) {
 240                 return this.each(function(){
 241                         jQuery( this ).wrapAll( html );
 242                 });
 243         },
 244
 245         append: function() {
 246                 return this.domManip(arguments, true, false, function(elem){
 247                         if (this.nodeType == 1)
 248                                 this.appendChild( elem );
 249                 });
 250         },
 251
 252         prepend: function() {
 253                 return this.domManip(arguments, true, true, function(elem){
 254                         if (this.nodeType == 1)
 255                                 this.insertBefore( elem, this.firstChild );
 256                 });
 257         },
 258
 259         before: function() {
 260                 return this.domManip(arguments, false, false, function(elem){
 261                         this.parentNode.insertBefore( elem, this );
 262                 });
 263         },
 264
 265         after: function() {
 266                 return this.domManip(arguments, false, true, function(elem){
 267                         this.parentNode.insertBefore( elem, this.nextSibling );
 268                 });
 269         },
 270
 271         end: function() {
 272                 return this.prevObject || jQuery( [] );
 273         },
 274
 275         find: function( selector ) {
 276                 var elems = jQuery.map(this, function(elem){
 277                         return jQuery.find( selector, elem );
 278                 });
 279
 280                 return this.pushStack( /[^+>] [^+>]/.test( selector ) ?
 281                         jQuery.unique( elems ) :
 282                         elems, "find", selector );
 283         },
 284
 285         clone: function( events ) {
 286                 // Do the clone
 287                 var ret = this.map(function(){
 288                         if ( jQuery.browser.msie && !jQuery.isXMLDoc(this) ) {
 289                                 // IE copies events bound via attachEvent when
 290                                 // using cloneNode. Calling detachEvent on the
 291                                 // clone will also remove the events from the orignal
 292                                 // In order to get around this, we use innerHTML.
 293                                 // Unfortunately, this means some modifications to
 294                                 // attributes in IE that are actually only stored
 295                                 // as properties will not be copied (such as the
 296                                 // the name attribute on an input).
 297                                 var clone = this.cloneNode(true),
 298                                         container = document.createElement("div");
 299                                 container.appendChild(clone);
 300                                 return jQuery.clean([container.innerHTML])[0];
 301                         } else
 302                                 return this.cloneNode(true);
 303                 });
 304
 305                 // Need to set the expando to null on the cloned set if it exists
 306                 // removeData doesn't work here, IE removes it from the original as well
 307                 // this is primarily for IE but the data expando shouldn't be copied over in any browser
 308                 var clone = ret.find("*").andSelf().each(function(){
 309                         if ( this[ expando ] !== undefined )
 310                                 this[ expando ] = null;
 311                 });
 312
 313                 // Copy the events from the original to the clone
 314                 if ( events === true )
 315                         this.find("*").andSelf().each(function(i){
 316                                 if (this.nodeType == 3)
 317                                         return;
 318                                 var events = jQuery.data( this, "events" );
 319
 320                                 for ( var type in events )
 321                                         for ( var handler in events[ type ] )
 322                                                 jQuery.event.add( clone[ i ], type, events[ type ][ handler ], events[ type ][ handler ].data );
 323                         });
 324
 325                 // Return the cloned set
 326                 return ret;
 327         },
 328
 329         filter: function( selector ) {
 330                 return this.pushStack(
 331                         jQuery.isFunction( selector ) &&
 332                         jQuery.grep(this, function(elem, i){
 333                                 return selector.call( elem, i );
 334                         }) ||
 335
 336                         jQuery.multiFilter( selector, this ), "filter", selector );
 337         },
 338
 339         not: function( selector ) {
 340                 if ( typeof selector === "string" )
 341                         // test special case where just one selector is passed in
 342                         if ( isSimple.test( selector ) )
 343                                 return this.pushStack( jQuery.multiFilter( selector, this, true ), "not", selector );
 344                         else
 345                                 selector = jQuery.multiFilter( selector, this );
 346
 347                 var isArrayLike = selector.length && selector[selector.length - 1] !== undefined && !selector.nodeType;
 348                 return this.filter(function() {
 349                         return isArrayLike ? jQuery.inArray( this, selector ) < 0 : this != selector;
 350                 });
 351         },
 352
 353         add: function( selector ) {
 354                 return this.pushStack( jQuery.unique( jQuery.merge(
 355                         this.get(),
 356                         typeof selector === "string" ?
 357                                 jQuery( selector ) :
 358                                 jQuery.makeArray( selector )
 359                 )));
 360         },
 361
 362         is: function( selector ) {
 363                 return !!selector && jQuery.multiFilter( selector, this ).length > 0;
 364         },
 365
 366         hasClass: function( selector ) {
 367                 return !!selector && this.is( "." + selector );
 368         },
 369
 370         val: function( value ) {
 371                 if ( value === undefined ) {
 372                         var elem = this[0];
 373
 374                         if ( elem ) {
 375                                 if( jQuery.nodeName( elem, 'option' ) )
 376                                         return (elem.attributes.value || {}).specified ? elem.value : elem.text;
 377
 378                                 // We need to handle select boxes special
 379                                 if ( jQuery.nodeName( elem, "select" ) ) {
 380                                         var index = elem.selectedIndex,
 381                                                 values = [],
 382                                                 options = elem.options,
 383                                                 one = elem.type == "select-one";
 384
 385                                         // Nothing was selected
 386                                         if ( index < 0 )
 387                                                 return null;
 388
 389                                         // Loop through all the selected options
 390                                         for ( var i = one ? index : 0, max = one ? index + 1 : options.length; i < max; i++ ) {
 391                                                 var option = options[ i ];
 392
 393                                                 if ( option.selected ) {
 394                                                         // Get the specifc value for the option
 395                                                         value = jQuery(option).val();
 396
 397                                                         // We don't need an array for one selects
 398                                                         if ( one )
 399                                                                 return value;
 400
 401                                                         // Multi-Selects return an array
 402                                                         values.push( value );
 403                                                 }
 404                                         }
 405
 406                                         return values;
 407                                 }
 408
 409                                 // Everything else, we just grab the value
 410                                 return (elem.value || "").replace(/\r/g, "");
 411
 412                         }
 413
 414                         return undefined;
 415                 }
 416
 417                 if ( typeof value === "number" )
 418                         value += '';
 419
 420                 return this.each(function(){
 421                         if ( this.nodeType != 1 )
 422                                 return;
 423
 424                         if ( jQuery.isArray(value) && /radio|checkbox/.test( this.type ) )
 425                                 this.checked = (jQuery.inArray(this.value, value) >= 0 ||
 426                                         jQuery.inArray(this.name, value) >= 0);
 427
 428                         else if ( jQuery.nodeName( this, "select" ) ) {
 429                                 var values = jQuery.makeArray(value);
 430
 431                                 jQuery( "option", this ).each(function(){
 432                                         this.selected = (jQuery.inArray( this.value, values ) >= 0 ||
 433                                                 jQuery.inArray( this.text, values ) >= 0);
 434                                 });
 435
 436                                 if ( !values.length )
 437                                         this.selectedIndex = -1;
 438
 439                         } else
 440                                 this.value = value;
 441                 });
 442         },
 443
 444         html: function( value ) {
 445                 return value === undefined ?
 446                         (this[0] ?
 447                                 this[0].innerHTML :
 448                                 null) :
 449                         this.empty().append( value );
 450         },
 451
 452         replaceWith: function( value ) {
 453                 return this.after( value ).remove();
 454         },
 455
 456         eq: function( i ) {
 457                 return this.slice( i, +i + 1 );
 458         },
 459
 460         slice: function() {
 461                 return this.pushStack( Array.prototype.slice.apply( this, arguments ),
 462                         "slice", Array.prototype.slice.call(arguments).join(",") );
 463         },
 464
 465         map: function( callback ) {
 466                 return this.pushStack( jQuery.map(this, function(elem, i){
 467                         return callback.call( elem, i, elem );
 468                 }));
 469         },
 470
 471         andSelf: function() {
 472                 return this.add( this.prevObject );
 473         },
 474
 475         data: function( key, value ){
 476                 var parts = key.split(".");
 477                 parts[1] = parts[1] ? "." + parts[1] : "";
 478
 479                 if ( value === undefined ) {
 480                         var data = this.triggerHandler("getData" + parts[1] + "!", [parts[0]]);
 481
 482                         if ( data === undefined && this.length )
 483                                 data = jQuery.data( this[0], key );
 484
 485                         return data === undefined && parts[1] ?
 486                                 this.data( parts[0] ) :
 487                                 data;
 488                 } else
 489                         return this.trigger("setData" + parts[1] + "!", [parts[0], value]).each(function(){
 490                                 jQuery.data( this, key, value );
 491                         });
 492         },
 493
 494         removeData: function( key ){
 495                 return this.each(function(){
 496                         jQuery.removeData( this, key );
 497                 });
 498         },
 499
 500         domManip: function( args, table, reverse, callback ) {
 501                 var clone = this.length > 1, elems;
 502
 503                 return this.each(function(){
 504                         if ( !elems ) {
 505                                 elems = jQuery.clean( args, this.ownerDocument );
 506
 507                                 if ( reverse )
 508                                         elems.reverse();
 509                         }
 510
 511                         var obj = this;
 512
 513                         if ( table && jQuery.nodeName( this, "table" ) && jQuery.nodeName( elems[0], "tr" ) )
 514                                 obj = this.getElementsByTagName("tbody")[0] || this.appendChild( this.ownerDocument.createElement("tbody") );
 515
 516                         var scripts = jQuery( [] );
 517
 518                         jQuery.each(elems, function(){
 519                                 var elem = clone ?
 520                                         jQuery( this ).clone( true )[0] :
 521                                         this;
 522
 523                                 // execute all scripts after the elements have been injected
 524                                 if ( jQuery.nodeName( elem, "script" ) )
 525                                         scripts = scripts.add( elem );
 526                                 else {
 527                                         // Remove any inner scripts for later evaluation
 528                                         if ( elem.nodeType == 1 )
 529                                                 scripts = scripts.add( jQuery( "script", elem ).remove() );
 530
 531                                         // Inject the elements into the document
 532                                         callback.call( obj, elem );
 533                                 }
 534                         });
 535
 536                         scripts.each( evalScript );
 537                 });
 538         }
 539 };
 540
 541 // Give the init function the jQuery prototype for later instantiation
 542 jQuery.fn.init.prototype = jQuery.fn;
 543
 544 function evalScript( i, elem ) {
 545         if ( elem.src )
 546                 jQuery.ajax({
 547                         url: elem.src,
 548                         async: false,
 549                         dataType: "script"
 550                 });
 551
 552         else
 553                 jQuery.globalEval( elem.text || elem.textContent || elem.innerHTML || "" );
 554
 555         if ( elem.parentNode )
 556                 elem.parentNode.removeChild( elem );
 557 }
 558
 559 function now(){
 560         return +new Date;
 561 }
 562
 563 jQuery.extend = jQuery.fn.extend = function() {
 564         // copy reference to target object
 565         var target = arguments[0] || {}, i = 1, length = arguments.length, deep = false, options;
 566
 567         // Handle a deep copy situation
 568         if ( typeof target === "boolean" ) {
 569                 deep = target;
 570                 target = arguments[1] || {};
 571                 // skip the boolean and the target
 572                 i = 2;
 573         }
 574
 575         // Handle case when target is a string or something (possible in deep copy)
 576         if ( typeof target !== "object" && !jQuery.isFunction(target) )
 577                 target = {};
 578
 579         // extend jQuery itself if only one argument is passed
 580         if ( length == i ) {
 581                 target = this;
 582                 --i;
 583         }
 584
 585         for ( ; i < length; i++ )
 586                 // Only deal with non-null/undefined values
 587                 if ( (options = arguments[ i ]) != null )
 588                         // Extend the base object
 589                         for ( var name in options ) {
 590                                 var src = target[ name ], copy = options[ name ];
 591
 592                                 // Prevent never-ending loop
 593                                 if ( target === copy )
 594                                         continue;
 595
 596                                 // Recurse if we're merging object values
 597                                 if ( deep && copy && typeof copy === "object" && !copy.nodeType )
 598                                         target[ name ] = jQuery.extend( deep,
 599                                                 // Never move original objects, clone them
 600                                                 src || ( copy.length != null ? [ ] : { } )
 601                                         , copy );
 602
 603                                 // Don't bring in undefined values
 604                                 else if ( copy !== undefined )
 605                                         target[ name ] = copy;
 606
 607                         }
 608
 609         // Return the modified object
 610         return target;
 611 };
 612
 613 var expando = "jQuery" + now(), uuid = 0, windowData = {},
 614         // exclude the following css properties to add px
 615         exclude = /z-?index|font-?weight|opacity|zoom|line-?height/i,
 616         // cache defaultView
 617         defaultView = document.defaultView || {},
 618         toString = Object.prototype.toString;
 619
 620 jQuery.extend({
 621         noConflict: function( deep ) {
 622                 window.$ = _$;
 623
 624                 if ( deep )
 625                         window.jQuery = _jQuery;
 626
 627                 return jQuery;
 628         },
 629
 630         // See test/unit/core.js for details concerning isFunction.
 631         // Since version 1.3, DOM methods and functions like alert
 632         // aren't supported. They return false on IE (#2968).
 633         isFunction: function( obj ) {
 634                 return toString.call(obj) === "[object Function]";
 635         },
 636
 637         isArray: function( obj ) {
 638                 return toString.call(obj) === "[object Array]";
 639         },
 640
 641         // check if an element is in a (or is an) XML document
 642         isXMLDoc: function( elem ) {
 643                 return elem.documentElement && !elem.body ||
 644                         elem.tagName && elem.ownerDocument && !elem.ownerDocument.body;
 645         },
 646
 647         // Evalulates a script in a global context
 648         globalEval: function( data ) {
 649                 data = jQuery.trim( data );
 650
 651                 if ( data ) {
 652                         // Inspired by code by Andrea Giammarchi
 653                         // http://webreflection.blogspot.com/2007/08/global-scope-evaluation-and-dom.html
 654                         var head = document.getElementsByTagName("head")[0] || document.documentElement,
 655                                 script = document.createElement("script");
 656
 657                         script.type = "text/javascript";
 658                         if ( jQuery.browser.msie )
 659                                 script.text = data;
 660                         else
 661                                 script.appendChild( document.createTextNode( data ) );
 662
 663                         // Use insertBefore instead of appendChild  to circumvent an IE6 bug.
 664                         // This arises when a base node is used (#2709).
 665                         head.insertBefore( script, head.firstChild );
 666                         head.removeChild( script );
 667                 }
 668         },
 669
 670         nodeName: function( elem, name ) {
 671                 return elem.nodeName && elem.nodeName.toUpperCase() == name.toUpperCase();
 672         },
 673
 674         cache: {},
 675
 676         data: function( elem, name, data ) {
 677                 elem = elem == window ?
 678                         windowData :
 679                         elem;
 680
 681                 var id = elem[ expando ];
 682
 683                 // Compute a unique ID for the element
 684                 if ( !id )
 685                         id = elem[ expando ] = ++uuid;
 686
 687                 // Only generate the data cache if we're
 688                 // trying to access or manipulate it
 689                 if ( name && !jQuery.cache[ id ] )
 690                         jQuery.cache[ id ] = {};
 691
 692                 // Prevent overriding the named cache with undefined values
 693                 if ( data !== undefined )
 694                         jQuery.cache[ id ][ name ] = data;
 695
 696                 // Return the named cache data, or the ID for the element
 697                 return name ?
 698                         jQuery.cache[ id ][ name ] || null :
 699                         id;
 700         },
 701
 702         removeData: function( elem, name ) {
 703                 elem = elem == window ?
 704                         windowData :
 705                         elem;
 706
 707                 var id = elem[ expando ];
 708
 709                 // If we want to remove a specific section of the element's data
 710                 if ( name ) {
 711                         if ( jQuery.cache[ id ] ) {
 712                                 // Remove the section of cache data
 713                                 delete jQuery.cache[ id ][ name ];
 714
 715                                 // If we've removed all the data, remove the element's cache
 716                                 name = "";
 717
 718                                 for ( name in jQuery.cache[ id ] )
 719                                         break;
 720
 721                                 if ( !name )
 722                                         jQuery.removeData( elem );
 723                         }
 724
 725                 // Otherwise, we want to remove all of the element's data
 726                 } else {
 727                         // Clean up the element expando
 728                         try {
 729                                 delete elem[ expando ];
 730                         } catch(e){
 731                                 // IE has trouble directly removing the expando
 732                                 // but it's ok with using removeAttribute
 733                                 if ( elem.removeAttribute )
 734                                         elem.removeAttribute( expando );
 735                         }
 736
 737                         // Completely remove the data cache
 738                         delete jQuery.cache[ id ];
 739                 }
 740         },
 741
 742         // args is for internal usage only
 743         each: function( object, callback, args ) {
 744                 var name, i = 0, length = object.length;
 745
 746                 if ( args ) {
 747                         if ( length === undefined ) {
 748                                 for ( name in object )
 749                                         if ( callback.apply( object[ name ], args ) === false )
 750                                                 break;
 751                         } else
 752                                 for ( ; i < length; )
 753                                         if ( callback.apply( object[ i++ ], args ) === false )
 754                                                 break;
 755
 756                 // A special, fast, case for the most common use of each
 757                 } else {
 758                         if ( length === undefined ) {
 759                                 for ( name in object )
 760                                         if ( callback.call( object[ name ], name, object[ name ] ) === false )
 761                                                 break;
 762                         } else
 763                                 for ( var value = object[0];
 764                                         i < length && callback.call( value, i, value ) !== false; value = object[++i] ){}
 765                 }
 766
 767                 return object;
 768         },
 769
 770         prop: function( elem, value, type, i, name ) {
 771                 // Handle executable functions
 772                 if ( jQuery.isFunction( value ) )
 773                         value = value.call( elem, i );
 774
 775                 // Handle passing in a number to a CSS property
 776                 return typeof value === "number" && type == "curCSS" && !exclude.test( name ) ?
 777                         value + "px" :
 778                         value;
 779         },
 780
 781         className: {
 782                 // internal only, use addClass("class")
 783                 add: function( elem, classNames ) {
 784                         jQuery.each((classNames || "").split(/\s+/), function(i, className){
 785                                 if ( elem.nodeType == 1 && !jQuery.className.has( elem.className, className ) )
 786                                         elem.className += (elem.className ? " " : "") + className;
 787                         });
 788                 },
 789
 790                 // internal only, use removeClass("class")
 791                 remove: function( elem, classNames ) {
 792                         if (elem.nodeType == 1)
 793                                 elem.className = classNames !== undefined ?
 794                                         jQuery.grep(elem.className.split(/\s+/), function(className){
 795                                                 return !jQuery.className.has( classNames, className );
 796                                         }).join(" ") :
 797                                         "";
 798                 },
 799
 800                 // internal only, use hasClass("class")
 801                 has: function( elem, className ) {
 802                         return jQuery.inArray( className, (elem.className || elem).toString().split(/\s+/) ) > -1;
 803                 }
 804         },
 805
 806         // A method for quickly swapping in/out CSS properties to get correct calculations
 807         swap: function( elem, options, callback ) {
 808                 var old = {};
 809                 // Remember the old values, and insert the new ones
 810                 for ( var name in options ) {
 811                         old[ name ] = elem.style[ name ];
 812                         elem.style[ name ] = options[ name ];
 813                 }
 814
 815                 callback.call( elem );
 816
 817                 // Revert the old values
 818                 for ( var name in options )
 819                         elem.style[ name ] = old[ name ];
 820         },
 821
 822         css: function( elem, name, force ) {
 823                 if ( name == "width" || name == "height" ) {
 824                         var val, props = { position: "absolute", visibility: "hidden", display:"block" }, which = name == "width" ? [ "Left", "Right" ] : [ "Top", "Bottom" ];
 825
 826                         function getWH() {
 827                                 val = name == "width" ? elem.offsetWidth : elem.offsetHeight;
 828                                 var padding = 0, border = 0;
 829                                 jQuery.each( which, function() {
 830                                         padding += parseFloat(jQuery.curCSS( elem, "padding" + this, true)) || 0;
 831                                         border += parseFloat(jQuery.curCSS( elem, "border" + this + "Width", true)) || 0;
 832                                 });
 833                                 val -= Math.round(padding + border);
 834                         }
 835
 836                         if ( jQuery(elem).is(":visible") )
 837                                 getWH();
 838                         else
 839                                 jQuery.swap( elem, props, getWH );
 840
 841                         return Math.max(0, val);
 842                 }
 843
 844                 return jQuery.curCSS( elem, name, force );
 845         },
 846
 847         curCSS: function( elem, name, force ) {
 848                 var ret, style = elem.style;
 849
 850                 // A helper method for determining if an element's values are broken
 851                 function color( elem ) {
 852                         if ( !jQuery.browser.safari )
 853                                 return false;
 854
 855                         // defaultView is cached
 856                         var ret = defaultView.getComputedStyle( elem, null );
 857                         return !ret || ret.getPropertyValue("color") == "";
 858                 }
 859
 860                 // We need to handle opacity special in IE
 861                 if ( name == "opacity" && jQuery.browser.msie ) {
 862                         ret = jQuery.attr( style, "opacity" );
 863
 864                         return ret == "" ?
 865                                 "1" :
 866                                 ret;
 867                 }
 868                 // Opera sometimes will give the wrong display answer, this fixes it, see #2037
 869                 if ( jQuery.browser.opera && name == "display" ) {
 870                         var save = style.outline;
 871                         style.outline = "0 solid black";
 872                         style.outline = save;
 873                 }
 874
 875                 // Make sure we're using the right name for getting the float value
 876                 if ( name.match( /float/i ) )
 877                         name = styleFloat;
 878
 879                 if ( !force && style && style[ name ] )
 880                         ret = style[ name ];
 881
 882                 else if ( defaultView.getComputedStyle ) {
 883
 884                         // Only "float" is needed here
 885                         if ( name.match( /float/i ) )
 886                                 name = "float";
 887
 888                         name = name.replace( /([A-Z])/g, "-$1" ).toLowerCase();
 889
 890                         var computedStyle = defaultView.getComputedStyle( elem, null );
 891
 892                         if ( computedStyle && !color( elem ) )
 893                                 ret = computedStyle.getPropertyValue( name );
 894
 895                         // If the element isn't reporting its values properly in Safari
 896                         // then some display: none elements are involved
 897                         else {
 898                                 var swap = [], stack = [], a = elem, i = 0;
 899
 900                                 // Locate all of the parent display: none elements
 901                                 for ( ; a && color(a); a = a.parentNode )
 902                                         stack.unshift(a);
 903
 904                                 // Go through and make them visible, but in reverse
 905                                 // (It would be better if we knew the exact display type that they had)
 906                                 for ( ; i < stack.length; i++ )
 907                                         if ( color( stack[ i ] ) ) {
 908                                                 swap[ i ] = stack[ i ].style.display;
 909                                                 stack[ i ].style.display = "block";
 910                                         }
 911
 912                                 // Since we flip the display style, we have to handle that
 913                                 // one special, otherwise get the value
 914                                 ret = name == "display" && swap[ stack.length - 1 ] != null ?
 915                                         "none" :
 916                                         ( computedStyle && computedStyle.getPropertyValue( name ) ) || "";
 917
 918                                 // Finally, revert the display styles back
 919                                 for ( i = 0; i < swap.length; i++ )
 920                                         if ( swap[ i ] != null )
 921                                                 stack[ i ].style.display = swap[ i ];
 922                         }
 923
 924                         // We should always get a number back from opacity
 925                         if ( name == "opacity" && ret == "" )
 926                                 ret = "1";
 927
 928                 } else if ( elem.currentStyle ) {
 929                         var camelCase = name.replace(/\-(\w)/g, function(all, letter){
 930                                 return letter.toUpperCase();
 931                         });
 932
 933                         ret = elem.currentStyle[ name ] || elem.currentStyle[ camelCase ];
 934
 935                         // From the awesome hack by Dean Edwards
 936                         // http://erik.eae.net/archives/2007/07/27/18.54.15/#comment-102291
 937
 938                         // If we're not dealing with a regular pixel number
 939                         // but a number that has a weird ending, we need to convert it to pixels
 940                         if ( !/^\d+(px)?$/i.test( ret ) && /^\d/.test( ret ) ) {
 941                                 // Remember the original values
 942                                 var left = style.left, rsLeft = elem.runtimeStyle.left;
 943
 944                                 // Put in the new values to get a computed value out
 945                                 elem.runtimeStyle.left = elem.currentStyle.left;
 946                                 style.left = ret || 0;
 947                                 ret = style.pixelLeft + "px";
 948
 949                                 // Revert the changed values
 950                                 style.left = left;
 951                                 elem.runtimeStyle.left = rsLeft;
 952                         }
 953                 }
 954
 955                 return ret;
 956         },
 957
 958         clean: function( elems, context ) {
 959                 var ret = [];
 960                 context = context || document;
 961
 962                 // !context.createElement fails in IE with an error but returns typeof 'object'
 963                 if ( typeof context.createElement === "undefined" )
 964                         context = context.ownerDocument || context[0] && context[0].ownerDocument || document;
 965
 966                 jQuery.each(elems, function(i, elem){
 967                         if ( typeof elem === "number" )
 968                                 elem += '';
 969
 970                         if ( !elem )
 971                                 return;
 972
 973                         // Convert html string into DOM nodes
 974                         if ( typeof elem === "string" ) {
 975                                 // Fix "XHTML"-style tags in all browsers
 976                                 elem = elem.replace(/(<(\w+)[^>]*?)\/>/g, function(all, front, tag){
 977                                         return tag.match(/^(abbr|br|col|img|input|link|meta|param|hr|area|embed)$/i) ?
 978                                                 all :
 979                                                 front + "></" + tag + ">";
 980                                 });
 981
 982                                 // Trim whitespace, otherwise indexOf won't work as expected
 983                                 var tags = jQuery.trim( elem ).toLowerCase(), div = context.createElement("div");
 984
 985                                 var wrap =
 986                                         // option or optgroup
 987                                         !tags.indexOf("<opt") &&
 988                                         [ 1, "<select multiple='multiple'>", "</select>" ] ||
 989
 990                                         !tags.indexOf("<leg") &&
 991                                         [ 1, "<fieldset>", "</fieldset>" ] ||
 992
 993                                         tags.match(/^<(thead|tbody|tfoot|colg|cap)/) &&
 994                                         [ 1, "<table>", "</table>" ] ||
 995
 996                                         !tags.indexOf("<tr") &&
 997                                         [ 2, "<table><tbody>", "</tbody></table>" ] ||
 998
 999                                         // <thead> matched above
1000                                         (!tags.indexOf("<td") || !tags.indexOf("<th")) &&
1001                                         [ 3, "<table><tbody><tr>", "</tr></tbody></table>" ] ||
1002
1003                                         !tags.indexOf("<col") &&
1004                                         [ 2, "<table><tbody></tbody><colgroup>", "</colgroup></table>" ] ||
1005
1006                                         // IE can't serialize <link> and <script> tags normally
1007                                         jQuery.browser.msie &&
1008                                         [ 1, "div<div>", "</div>" ] ||
1009
1010                                         [ 0, "", "" ];
1011
1012                                 // Go to html and back, then peel off extra wrappers
1013                                 div.innerHTML = wrap[1] + elem + wrap[2];
1014
1015                                 // Move to the right depth
1016                                 while ( wrap[0]-- )
1017                                         div = div.lastChild;
1018
1019                                 // Remove IE's autoinserted <tbody> from table fragments
1020                                 if ( jQuery.browser.msie ) {
1021
1022                                         // String was a <table>, *may* have spurious <tbody>
1023                                         var tbody = !tags.indexOf("<table") && tags.indexOf("<tbody") < 0 ?
1024                                                 div.firstChild && div.firstChild.childNodes :
1025
1026                                                 // String was a bare <thead> or <tfoot>
1027                                                 wrap[1] == "<table>" && tags.indexOf("<tbody") < 0 ?
1028                                                         div.childNodes :
1029                                                         [];
1030
1031                                         for ( var j = tbody.length - 1; j >= 0 ; --j )
1032                                                 if ( jQuery.nodeName( tbody[ j ], "tbody" ) && !tbody[ j ].childNodes.length )
1033                                                         tbody[ j ].parentNode.removeChild( tbody[ j ] );
1034
1035                                         // IE completely kills leading whitespace when innerHTML is used
1036                                         if ( /^\s/.test( elem ) )
1037                                                 div.insertBefore( context.createTextNode( elem.match(/^\s*/)[0] ), div.firstChild );
1038
1039                                 }
1040
1041                                 elem = jQuery.makeArray( div.childNodes );
1042                         }
1043
1044                         if ( elem.length === 0 && (!jQuery.nodeName( elem, "form" ) && !jQuery.nodeName( elem, "select" )) )
1045                                 return;
1046
1047                         if ( elem[0] === undefined || jQuery.nodeName( elem, "form" ) || elem.options )
1048                                 ret.push( elem );
1049
1050                         else
1051                                 ret = jQuery.merge( ret, elem );
1052
1053                 });
1054
1055                 return ret;
1056         },
1057
1058         attr: function( elem, name, value ) {
1059                 // don't set attributes on text and comment nodes
1060                 if (!elem || elem.nodeType == 3 || elem.nodeType == 8)
1061                         return undefined;
1062
1063                 var notxml = !jQuery.isXMLDoc( elem ),
1064                         // Whether we are setting (or getting)
1065                         set = value !== undefined,
1066                         msie = jQuery.browser.msie;
1067
1068                 // Try to normalize/fix the name
1069                 name = notxml && jQuery.props[ name ] || name;
1070
1071                 // Only do all the following if this is a node (faster for style)
1072                 // IE elem.getAttribute passes even for style
1073                 if ( elem.tagName ) {
1074
1075                         // These attributes require special treatment
1076                         var special = /href|src|style/.test( name );
1077
1078                         // Safari mis-reports the default selected property of a hidden option
1079                         // Accessing the parent's selectedIndex property fixes it
1080                         if ( name == "selected" && jQuery.browser.safari )
1081                                 elem.parentNode.selectedIndex;
1082
1083                         // If applicable, access the attribute via the DOM 0 way
1084                         if ( name in elem && notxml && !special ) {
1085                                 if ( set ){
1086                                         // We can't allow the type property to be changed (since it causes problems in IE)
1087                                         if ( name == "type" && jQuery.nodeName( elem, "input" ) && elem.parentNode )
1088                                                 throw "type property can't be changed";
1089
1090                                         elem[ name ] = value;
1091                                 }
1092
1093                                 // browsers index elements by id/name on forms, give priority to attributes.
1094                                 if( jQuery.nodeName( elem, "form" ) && elem.getAttributeNode(name) )
1095                                         return elem.getAttributeNode( name ).nodeValue;
1096
1097                                 return elem[ name ];
1098                         }
1099
1100                         if ( msie && notxml &&  name == "style" )
1101                                 return jQuery.attr( elem.style, "cssText", value );
1102
1103                         if ( set )
1104                                 // convert the value to a string (all browsers do this but IE) see #1070
1105                                 elem.setAttribute( name, "" + value );
1106
1107                         var attr = msie && notxml && special
1108                                         // Some attributes require a special call on IE
1109                                         ? elem.getAttribute( name, 2 )
1110                                         : elem.getAttribute( name );
1111
1112                         // Non-existent attributes return null, we normalize to undefined
1113                         return attr === null ? undefined : attr;
1114                 }
1115
1116                 // elem is actually elem.style ... set the style
1117
1118                 // IE uses filters for opacity
1119                 if ( msie && name == "opacity" ) {
1120                         if ( set ) {
1121                                 // IE has trouble with opacity if it does not have layout
1122                                 // Force it by setting the zoom level
1123                                 elem.zoom = 1;
1124
1125                                 // Set the alpha filter to set the opacity
1126                                 elem.filter = (elem.filter || "").replace( /alpha\([^)]*\)/, "" ) +
1127                                         (parseInt( value ) + '' == "NaN" ? "" : "alpha(opacity=" + value * 100 + ")");
1128                         }
1129
1130                         return elem.filter && elem.filter.indexOf("opacity=") >= 0 ?
1131                                 (parseFloat( elem.filter.match(/opacity=([^)]*)/)[1] ) / 100) + '':
1132                                 "";
1133                 }
1134
1135                 name = name.replace(/-([a-z])/ig, function(all, letter){
1136                         return letter.toUpperCase();
1137                 });
1138
1139                 if ( set )
1140                         elem[ name ] = value;
1141
1142                 return elem[ name ];
1143         },
1144
1145         trim: function( text ) {
1146                 return (text || "").replace( /^\s+|\s+$/g, "" );
1147         },
1148
1149         makeArray: function( array ) {
1150                 var ret = [];
1151
1152                 if( array != null ){
1153                         var i = array.length;
1154                         // The window, strings (and functions) also have 'length'
1155                         if( i == null || typeof array === "string" || jQuery.isFunction(array) || array.setInterval )
1156                                 ret[0] = array;
1157                         else
1158                                 while( i )
1159                                         ret[--i] = array[i];
1160                 }
1161
1162                 return ret;
1163         },
1164
1165         inArray: function( elem, array ) {
1166                 for ( var i = 0, length = array.length; i < length; i++ )
1167                 // Use === because on IE, window == document
1168                         if ( array[ i ] === elem )
1169                                 return i;
1170
1171                 return -1;
1172         },
1173
1174         merge: function( first, second ) {
1175                 // We have to loop this way because IE & Opera overwrite the length
1176                 // expando of getElementsByTagName
1177                 var i = 0, elem, pos = first.length;
1178                 // Also, we need to make sure that the correct elements are being returned
1179                 // (IE returns comment nodes in a '*' query)
1180                 if ( jQuery.browser.msie ) {
1181                         while ( (elem = second[ i++ ]) )
1182                                 if ( elem.nodeType != 8 )
1183                                         first[ pos++ ] = elem;
1184
1185                 } else
1186                         while ( (elem = second[ i++ ]) )
1187                                 first[ pos++ ] = elem;
1188
1189                 return first;
1190         },
1191
1192         unique: function( array ) {
1193                 var ret = [], done = {};
1194
1195                 try {
1196
1197                         for ( var i = 0, length = array.length; i < length; i++ ) {
1198                                 var id = jQuery.data( array[ i ] );
1199
1200                                 if ( !done[ id ] ) {
1201                                         done[ id ] = true;
1202                                         ret.push( array[ i ] );
1203                                 }
1204                         }
1205
1206                 } catch( e ) {
1207                         ret = array;
1208                 }
1209
1210                 return ret;
1211         },
1212
1213         grep: function( elems, callback, inv ) {
1214                 var ret = [];
1215
1216                 // Go through the array, only saving the items
1217                 // that pass the validator function
1218                 for ( var i = 0, length = elems.length; i < length; i++ )
1219                         if ( !inv != !callback( elems[ i ], i ) )
1220                                 ret.push( elems[ i ] );
1221
1222                 return ret;
1223         },
1224
1225         map: function( elems, callback ) {
1226                 var ret = [];
1227
1228                 // Go through the array, translating each of the items to their
1229                 // new value (or values).
1230                 for ( var i = 0, length = elems.length; i < length; i++ ) {
1231                         var value = callback( elems[ i ], i );
1232
1233                         if ( value != null )
1234                                 ret[ ret.length ] = value;
1235                 }
1236
1237                 return ret.concat.apply( [], ret );
1238         }
1239 });
1240
1241 var userAgent = navigator.userAgent.toLowerCase();
1242
1243 // Figure out what browser is being used
1244 jQuery.browser = {
1245         version: (userAgent.match( /.+(?:rv|it|ra|ie)[\/: ]([\d.]+)/ ) || [0,'0'])[1],
1246         safari: /webkit/.test( userAgent ),
1247         opera: /opera/.test( userAgent ),
1248         msie: /msie/.test( userAgent ) && !/opera/.test( userAgent ),
1249         mozilla: /mozilla/.test( userAgent ) && !/(compatible|webkit)/.test( userAgent )
1250 };
1251
1252 var styleFloat = jQuery.browser.msie ?
1253         "styleFloat" :
1254         "cssFloat";
1255
1256 jQuery.extend({
1257         // Check to see if the W3C box model is being used
1258         boxModel: !jQuery.browser.msie || document.compatMode == "CSS1Compat",
1259
1260         props: {
1261                 "for": "htmlFor",
1262                 "class": "className",
1263                 "float": styleFloat,
1264                 cssFloat: styleFloat,
1265                 styleFloat: styleFloat,
1266                 readonly: "readOnly",
1267                 maxlength: "maxLength",
1268                 cellspacing: "cellSpacing",
1269                 rowspan: "rowSpan"
1270         }
1271 });
1272
1273 jQuery.each({
1274         parent: function(elem){return elem.parentNode;},
1275         parents: function(elem){return jQuery.dir(elem,"parentNode");},
1276         next: function(elem){return jQuery.nth(elem,2,"nextSibling");},
1277         prev: function(elem){return jQuery.nth(elem,2,"previousSibling");},
1278         nextAll: function(elem){return jQuery.dir(elem,"nextSibling");},
1279         prevAll: function(elem){return jQuery.dir(elem,"previousSibling");},
1280         siblings: function(elem){return jQuery.sibling(elem.parentNode.firstChild,elem);},
1281         children: function(elem){return jQuery.sibling(elem.firstChild);},
1282         contents: function(elem){return jQuery.nodeName(elem,"iframe")?elem.contentDocument||elem.contentWindow.document:jQuery.makeArray(elem.childNodes);}
1283 }, function(name, fn){
1284         jQuery.fn[ name ] = function( selector ) {
1285                 var ret = jQuery.map( this, fn );
1286
1287                 if ( selector && typeof selector == "string" )
1288                         ret = jQuery.multiFilter( selector, ret );
1289
1290                 return this.pushStack( jQuery.unique( ret ), name, selector );
1291         };
1292 });
1293
1294 jQuery.each({
1295         appendTo: "append",
1296         prependTo: "prepend",
1297         insertBefore: "before",
1298         insertAfter: "after",
1299         replaceAll: "replaceWith"
1300 }, function(name, original){
1301         jQuery.fn[ name ] = function() {
1302                 var args = arguments;
1303
1304                 return this.each(function(){
1305                         for ( var i = 0, length = args.length; i < length; i++ )
1306                                 jQuery( args[ i ] )[ original ]( this );
1307                 });
1308         };
1309 });
1310
1311 jQuery.each({
1312         removeAttr: function( name ) {
1313                 jQuery.attr( this, name, "" );
1314                 if (this.nodeType == 1)
1315                         this.removeAttribute( name );
1316         },
1317
1318         addClass: function( classNames ) {
1319                 jQuery.className.add( this, classNames );
1320         },
1321
1322         removeClass: function( classNames ) {
1323                 jQuery.className.remove( this, classNames );
1324         },
1325
1326         toggleClass: function( classNames ) {
1327                 jQuery.className[ jQuery.className.has( this, classNames ) ? "remove" : "add" ]( this, classNames );
1328         },
1329
1330         remove: function( selector ) {
1331                 if ( !selector || jQuery.filter( selector, [ this ] ).r.length ) {
1332                         // Prevent memory leaks
1333                         jQuery( "*", this ).add([this]).each(function(){
1334                                 jQuery.event.remove(this);
1335                                 jQuery.removeData(this);
1336                         });
1337                         if (this.parentNode)
1338                                 this.parentNode.removeChild( this );
1339                 }
1340         },
1341
1342         empty: function() {
1343                 // Remove element nodes and prevent memory leaks
1344                 jQuery( ">*", this ).remove();
1345
1346                 // Remove any remaining nodes
1347                 while ( this.firstChild )
1348                         this.removeChild( this.firstChild );
1349         }
1350 }, function(name, fn){
1351         jQuery.fn[ name ] = function(){
1352                 return this.each( fn, arguments );
1353         };
1354 });
1355
1356 jQuery.each([ "Height", "Width" ], function(i, name){
1357         var type = name.toLowerCase();
1358
1359         jQuery.fn[ type ] = function( size ) {
1360                 // Get window width or height
1361                 return this[0] == window ?
1362                         // Opera reports document.body.client[Width/Height] properly in both quirks and standards
1363                         jQuery.browser.opera && document.body.parentNode[ "client" + name ] ||
1364
1365                         // Safari reports inner[Width/Height] just fine (Mozilla and Opera include scroll bar widths)
1366                         jQuery.browser.safari && window[ "inner" + name ] ||
1367
1368                         // Everyone else use document.documentElement or document.body depending on Quirks vs Standards mode
1369                         document.compatMode == "CSS1Compat" && document.documentElement[ "client" + name ] || document.body[ "client" + name ] :
1370
1371                         // Get document width or height
1372                         this[0] == document ?
1373                                 // Either scroll[Width/Height] or offset[Width/Height], whichever is greater
1374                                 Math.max(
1375                                         Math.max(document.body["scroll" + name], document.documentElement["scroll" + name]),
1376                                         Math.max(document.body["offset" + name], document.documentElement["offset" + name])
1377                                 ) :
1378
1379                                 // Get or set width or height on the element
1380                                 size === undefined ?
1381                                         // Get width or height on the element
1382                                         (this.length ? jQuery.css( this[0], type ) : null) :
1383
1384                                         // Set the width or height on the element (default to pixels if value is unitless)
1385                                         this.css( type, typeof size === "string" ? size : size + "px" );
1386         };
1387 });
1388
1389 // Helper function used by the dimensions and offset modules
1390 function num(elem, prop) {
1391         return elem[0] && parseInt( jQuery.curCSS(elem[0], prop, true), 10 ) || 0;
1392 }