src/core.js

   1 var jQuery = (function() {
   2
   3 // Define a local copy of jQuery
   4 var jQuery = function( selector, context ) {
   5                 // The jQuery object is actually just the init constructor 'enhanced'
   6                 return new jQuery.fn.init( selector, context, rootjQuery );
   7         },
   8
   9         // Map over jQuery in case of overwrite
  10         _jQuery = window.jQuery,
  11
  12         // Map over the $ in case of overwrite
  13         _$ = window.$,
  14
  15         // A central reference to the root jQuery(document)
  16         rootjQuery,
  17
  18         // A simple way to check for HTML strings or ID strings
  19         // (both of which we optimize for)
  20         quickExpr = /^(?:[^<]*(<[\w\W]+>)[^>]*$|#([\w\-]+)$)/,
  21
  22         // Check if a string has a non-whitespace character in it
  23         rnotwhite = /\S/,
  24
  25         // Used for trimming whitespace
  26         trimLeft = /^\s+/,
  27         trimRight = /\s+$/,
  28
  29         // Check for non-word characters
  30         rnonword = /\W/,
  31
  32         // Check for digits
  33         rdigit = /\d/,
  34
  35         // Match a standalone tag
  36         rsingleTag = /^<(\w+)\s*\/?>(?:<\/\1>)?$/,
  37
  38         // JSON RegExp
  39         rvalidchars = /^[\],:{}\s]*$/,
  40         rvalidescape = /\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g,
  41         rvalidtokens = /"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g,
  42         rvalidbraces = /(?:^|:|,)(?:\s*\[)+/g,
  43
  44         // Useragent RegExp
  45         rwebkit = /(webkit)[ \/]([\w.]+)/,
  46         ropera = /(opera)(?:.*version)?[ \/]([\w.]+)/,
  47         rmsie = /(msie) ([\w.]+)/,
  48         rmozilla = /(mozilla)(?:.*? rv:([\w.]+))?/,
  49
  50         // Keep a UserAgent string for use with jQuery.browser
  51         userAgent = navigator.userAgent,
  52
  53         // For matching the engine and version of the browser
  54         browserMatch,
  55
  56         // Has the ready events already been bound?
  57         readyBound = false,
  58
  59         // The deferred used on DOM ready
  60         readyList,
  61
  62         // Promise methods
  63         promiseMethods = "then done fail isResolved isRejected promise".split( " " ),
  64
  65         // The ready event handler
  66         DOMContentLoaded,
  67
  68         // Save a reference to some core methods
  69         toString = Object.prototype.toString,
  70         hasOwn = Object.prototype.hasOwnProperty,
  71         push = Array.prototype.push,
  72         slice = Array.prototype.slice,
  73         trim = String.prototype.trim,
  74         indexOf = Array.prototype.indexOf,
  75
  76         // [[Class]] -> type pairs
  77         class2type = {};
  78
  79 jQuery.fn = jQuery.prototype = {
  80         constructor: jQuery,
  81         init: function( selector, context, rootjQuery ) {
  82                 var match, elem, ret, doc;
  83
  84                 // Handle $(""), $(null), or $(undefined)
  85                 if ( !selector ) {
  86                         return this;
  87                 }
  88
  89                 // Handle $(DOMElement)
  90                 if ( selector.nodeType ) {
  91                         this.context = this[0] = selector;
  92                         this.length = 1;
  93                         return this;
  94                 }
  95
  96                 // The body element only exists once, optimize finding it
  97                 if ( selector === "body" && !context && document.body ) {
  98                         this.context = document;
  99                         this[0] = document.body;
 100                         this.selector = "body";
 101                         this.length = 1;
 102                         return this;
 103                 }
 104
 105                 // Handle HTML strings
 106                 if ( typeof selector === "string" ) {
 107                         // Are we dealing with HTML string or an ID?
 108                         match = quickExpr.exec( selector );
 109
 110                         // Verify a match, and that no context was specified for #id
 111                         if ( match && (match[1] || !context) ) {
 112
 113                                 // HANDLE: $(html) -> $(array)
 114                                 if ( match[1] ) {
 115                                         context = context instanceof jQuery ? context[0] : context;
 116                                         doc = (context ? context.ownerDocument || context : document);
 117
 118                                         // If a single string is passed in and it's a single tag
 119                                         // just do a createElement and skip the rest
 120                                         ret = rsingleTag.exec( selector );
 121
 122                                         if ( ret ) {
 123                                                 if ( jQuery.isPlainObject( context ) ) {
 124                                                         selector = [ document.createElement( ret[1] ) ];
 125                                                         jQuery.fn.attr.call( selector, context, true );
 126
 127                                                 } else {
 128                                                         selector = [ doc.createElement( ret[1] ) ];
 129                                                 }
 130
 131                                         } else {
 132                                                 ret = jQuery.buildFragment( [ match[1] ], [ doc ] );
 133                                                 selector = (ret.cacheable ? jQuery(ret.fragment).clone()[0] : ret.fragment).childNodes;
 134                                         }
 135
 136                                         return jQuery.merge( this, selector );
 137
 138                                 // HANDLE: $("#id")
 139                                 } else {
 140                                         elem = document.getElementById( match[2] );
 141
 142                                         // Check parentNode to catch when Blackberry 4.6 returns
 143                                         // nodes that are no longer in the document #6963
 144                                         if ( elem && elem.parentNode ) {
 145                                                 // Handle the case where IE and Opera return items
 146                                                 // by name instead of ID
 147                                                 if ( elem.id !== match[2] ) {
 148                                                         return rootjQuery.find( selector );
 149                                                 }
 150
 151                                                 // Otherwise, we inject the element directly into the jQuery object
 152                                                 this.length = 1;
 153                                                 this[0] = elem;
 154                                         }
 155
 156                                         this.context = document;
 157                                         this.selector = selector;
 158                                         return this;
 159                                 }
 160
 161                         // HANDLE: $(expr, $(...))
 162                         } else if ( !context || context.jquery ) {
 163                                 return (context || rootjQuery).find( selector );
 164
 165                         // HANDLE: $(expr, context)
 166                         // (which is just equivalent to: $(context).find(expr)
 167                         } else {
 168                                 return this.constructor( context ).find( selector );
 169                         }
 170
 171                 // HANDLE: $(function)
 172                 // Shortcut for document ready
 173                 } else if ( jQuery.isFunction( selector ) ) {
 174                         return rootjQuery.ready( selector );
 175                 }
 176
 177                 if (selector.selector !== undefined) {
 178                         this.selector = selector.selector;
 179                         this.context = selector.context;
 180                 }
 181
 182                 return jQuery.makeArray( selector, this );
 183         },
 184
 185         // Start with an empty selector
 186         selector: "",
 187
 188         // The current version of jQuery being used
 189         jquery: "@VERSION",
 190
 191         // The default length of a jQuery object is 0
 192         length: 0,
 193
 194         // The number of elements contained in the matched element set
 195         size: function() {
 196                 return this.length;
 197         },
 198
 199         toArray: function() {
 200                 return slice.call( this, 0 );
 201         },
 202
 203         // Get the Nth element in the matched element set OR
 204         // Get the whole matched element set as a clean array
 205         get: function( num ) {
 206                 return num == null ?
 207
 208                         // Return a 'clean' array
 209                         this.toArray() :
 210
 211                         // Return just the object
 212                         ( num < 0 ? this[ this.length + num ] : this[ num ] );
 213         },
 214
 215         // Take an array of elements and push it onto the stack
 216         // (returning the new matched element set)
 217         pushStack: function( elems, name, selector ) {
 218                 // Build a new jQuery matched element set
 219                 var ret = this.constructor();
 220
 221                 if ( jQuery.isArray( elems ) ) {
 222                         push.apply( ret, elems );
 223
 224                 } else {
 225                         jQuery.merge( ret, elems );
 226                 }
 227
 228                 // Add the old object onto the stack (as a reference)
 229                 ret.prevObject = this;
 230
 231                 ret.context = this.context;
 232
 233                 if ( name === "find" ) {
 234                         ret.selector = this.selector + (this.selector ? " " : "") + selector;
 235                 } else if ( name ) {
 236                         ret.selector = this.selector + "." + name + "(" + selector + ")";
 237                 }
 238
 239                 // Return the newly-formed element set
 240                 return ret;
 241         },
 242
 243         // Execute a callback for every element in the matched set.
 244         // (You can seed the arguments with an array of args, but this is
 245         // only used internally.)
 246         each: function( callback, args ) {
 247                 return jQuery.each( this, callback, args );
 248         },
 249
 250         ready: function() {
 251                 // Attach the listeners
 252                 jQuery.bindReady();
 253
 254                 // Change ready & apply
 255                 return ( jQuery.fn.ready = readyList.done ).apply( this , arguments );
 256         },
 257
 258         eq: function( i ) {
 259                 return i === -1 ?
 260                         this.slice( i ) :
 261                         this.slice( i, +i + 1 );
 262         },
 263
 264         first: function() {
 265                 return this.eq( 0 );
 266         },
 267
 268         last: function() {
 269                 return this.eq( -1 );
 270         },
 271
 272         slice: function() {
 273                 return this.pushStack( slice.apply( this, arguments ),
 274                         "slice", slice.call(arguments).join(",") );
 275         },
 276
 277         map: function( callback ) {
 278                 return this.pushStack( jQuery.map(this, function( elem, i ) {
 279                         return callback.call( elem, i, elem );
 280                 }));
 281         },
 282
 283         end: function() {
 284                 return this.prevObject || this.constructor(null);
 285         },
 286
 287         // For internal use only.
 288         // Behaves like an Array's method, not like a jQuery method.
 289         push: push,
 290         sort: [].sort,
 291         splice: [].splice
 292 };
 293
 294 // Give the init function the jQuery prototype for later instantiation
 295 jQuery.fn.init.prototype = jQuery.fn;
 296
 297 jQuery.extend = jQuery.fn.extend = function() {
 298          var options, name, src, copy, copyIsArray, clone,
 299                 target = arguments[0] || {},
 300                 i = 1,
 301                 length = arguments.length,
 302                 deep = false;
 303
 304         // Handle a deep copy situation
 305         if ( typeof target === "boolean" ) {
 306                 deep = target;
 307                 target = arguments[1] || {};
 308                 // skip the boolean and the target
 309                 i = 2;
 310         }
 311
 312         // Handle case when target is a string or something (possible in deep copy)
 313         if ( typeof target !== "object" && !jQuery.isFunction(target) ) {
 314                 target = {};
 315         }
 316
 317         // extend jQuery itself if only one argument is passed
 318         if ( length === i ) {
 319                 target = this;
 320                 --i;
 321         }
 322
 323         for ( ; i < length; i++ ) {
 324                 // Only deal with non-null/undefined values
 325                 if ( (options = arguments[ i ]) != null ) {
 326                         // Extend the base object
 327                         for ( name in options ) {
 328                                 src = target[ name ];
 329                                 copy = options[ name ];
 330
 331                                 // Prevent never-ending loop
 332                                 if ( target === copy ) {
 333                                         continue;
 334                                 }
 335
 336                                 // Recurse if we're merging plain objects or arrays
 337                                 if ( deep && copy && ( jQuery.isPlainObject(copy) || (copyIsArray = jQuery.isArray(copy)) ) ) {
 338                                         if ( copyIsArray ) {
 339                                                 copyIsArray = false;
 340                                                 clone = src && jQuery.isArray(src) ? src : [];
 341
 342                                         } else {
 343                                                 clone = src && jQuery.isPlainObject(src) ? src : {};
 344                                         }
 345
 346                                         // Never move original objects, clone them
 347                                         target[ name ] = jQuery.extend( deep, clone, copy );
 348
 349                                 // Don't bring in undefined values
 350                                 } else if ( copy !== undefined ) {
 351                                         target[ name ] = copy;
 352                                 }
 353                         }
 354                 }
 355         }
 356
 357         // Return the modified object
 358         return target;
 359 };
 360
 361 jQuery.extend({
 362         noConflict: function( deep ) {
 363                 window.$ = _$;
 364
 365                 if ( deep ) {
 366                         window.jQuery = _jQuery;
 367                 }
 368
 369                 return jQuery;
 370         },
 371
 372         // Is the DOM ready to be used? Set to true once it occurs.
 373         isReady: false,
 374
 375         // A counter to track how many items to wait for before
 376         // the ready event fires. See #6781
 377         readyWait: 1,
 378
 379         // Handle when the DOM is ready
 380         ready: function( wait ) {
 381                 // A third-party is pushing the ready event forwards
 382                 if ( wait === true ) {
 383                         jQuery.readyWait--;
 384                 }
 385
 386                 // Make sure that the DOM is not already loaded
 387                 if ( !jQuery.readyWait || (wait !== true && !jQuery.isReady) ) {
 388                         // Make sure body exists, at least, in case IE gets a little overzealous (ticket #5443).
 389                         if ( !document.body ) {
 390                                 return setTimeout( jQuery.ready, 1 );
 391                         }
 392
 393                         // Remember that the DOM is ready
 394                         jQuery.isReady = true;
 395
 396                         // If a normal DOM Ready event fired, decrement, and wait if need be
 397                         if ( wait !== true && --jQuery.readyWait > 0 ) {
 398                                 return;
 399                         }
 400
 401                         // If there are functions bound, to execute
 402                         readyList.resolveWith( document , [ jQuery ] );
 403
 404                         // Trigger any bound ready events
 405                         if ( jQuery.fn.trigger ) {
 406                                 jQuery( document ).trigger( "ready" ).unbind( "ready" );
 407                         }
 408                 }
 409         },
 410
 411         bindReady: function() {
 412                 if ( readyBound ) {
 413                         return;
 414                 }
 415
 416                 readyBound = true;
 417
 418                 // Catch cases where $(document).ready() is called after the
 419                 // browser event has already occurred.
 420                 if ( document.readyState === "complete" ) {
 421                         // Handle it asynchronously to allow scripts the opportunity to delay ready
 422                         return setTimeout( jQuery.ready, 1 );
 423                 }
 424
 425                 // Mozilla, Opera and webkit nightlies currently support this event
 426                 if ( document.addEventListener ) {
 427                         // Use the handy event callback
 428                         document.addEventListener( "DOMContentLoaded", DOMContentLoaded, false );
 429
 430                         // A fallback to window.onload, that will always work
 431                         window.addEventListener( "load", jQuery.ready, false );
 432
 433                 // If IE event model is used
 434                 } else if ( document.attachEvent ) {
 435                         // ensure firing before onload,
 436                         // maybe late but safe also for iframes
 437                         document.attachEvent("onreadystatechange", DOMContentLoaded);
 438
 439                         // A fallback to window.onload, that will always work
 440                         window.attachEvent( "onload", jQuery.ready );
 441
 442                         // If IE and not a frame
 443                         // continually check to see if the document is ready
 444                         var toplevel = false;
 445
 446                         try {
 447                                 toplevel = window.frameElement == null;
 448                         } catch(e) {}
 449
 450                         if ( document.documentElement.doScroll && toplevel ) {
 451                                 doScrollCheck();
 452                         }
 453                 }
 454         },
 455
 456         // See test/unit/core.js for details concerning isFunction.
 457         // Since version 1.3, DOM methods and functions like alert
 458         // aren't supported. They return false on IE (#2968).
 459         isFunction: function( obj ) {
 460                 return jQuery.type(obj) === "function";
 461         },
 462
 463         isArray: Array.isArray || function( obj ) {
 464                 return jQuery.type(obj) === "array";
 465         },
 466
 467         // A crude way of determining if an object is a window
 468         isWindow: function( obj ) {
 469                 return obj && typeof obj === "object" && "setInterval" in obj;
 470         },
 471
 472         isNaN: function( obj ) {
 473                 return obj == null || !rdigit.test( obj ) || isNaN( obj );
 474         },
 475
 476         type: function( obj ) {
 477                 return obj == null ?
 478                         String( obj ) :
 479                         class2type[ toString.call(obj) ] || "object";
 480         },
 481
 482         isPlainObject: function( obj ) {
 483                 // Must be an Object.
 484                 // Because of IE, we also have to check the presence of the constructor property.
 485                 // Make sure that DOM nodes and window objects don't pass through, as well
 486                 if ( !obj || jQuery.type(obj) !== "object" || obj.nodeType || jQuery.isWindow( obj ) ) {
 487                         return false;
 488                 }
 489
 490                 // Not own constructor property must be Object
 491                 if ( obj.constructor &&
 492                         !hasOwn.call(obj, "constructor") &&
 493                         !hasOwn.call(obj.constructor.prototype, "isPrototypeOf") ) {
 494                         return false;
 495                 }
 496
 497                 // Own properties are enumerated firstly, so to speed up,
 498                 // if last one is own, then all properties are own.
 499
 500                 var key;
 501                 for ( key in obj ) {}
 502
 503                 return key === undefined || hasOwn.call( obj, key );
 504         },
 505
 506         isEmptyObject: function( obj ) {
 507                 for ( var name in obj ) {
 508                         return false;
 509                 }
 510                 return true;
 511         },
 512
 513         error: function( msg ) {
 514                 throw msg;
 515         },
 516
 517         parseJSON: function( data ) {
 518                 if ( typeof data !== "string" || !data ) {
 519                         return null;
 520                 }
 521
 522                 // Make sure leading/trailing whitespace is removed (IE can't handle it)
 523                 data = jQuery.trim( data );
 524
 525                 // Make sure the incoming data is actual JSON
 526                 // Logic borrowed from http://json.org/json2.js
 527                 if ( rvalidchars.test(data.replace(rvalidescape, "@")
 528                         .replace(rvalidtokens, "]")
 529                         .replace(rvalidbraces, "")) ) {
 530
 531                         // Try to use the native JSON parser first
 532                         return window.JSON && window.JSON.parse ?
 533                                 window.JSON.parse( data ) :
 534                                 (new Function("return " + data))();
 535
 536                 } else {
 537                         jQuery.error( "Invalid JSON: " + data );
 538                 }
 539         },
 540
 541         // Cross-browser xml parsing
 542         // (xml & tmp used internally)
 543         parseXML: function( data , xml , tmp ) {
 544
 545                 if ( window.DOMParser ) { // Standard
 546                         tmp = new DOMParser();
 547                         xml = tmp.parseFromString( data , "text/xml" );
 548                 } else { // IE
 549                         xml = new ActiveXObject( "Microsoft.XMLDOM" );
 550                         xml.async = "false";
 551                         xml.loadXML( data );
 552                 }
 553
 554                 tmp = xml.documentElement;
 555
 556                 if ( ! tmp || ! tmp.nodeName || tmp.nodeName === "parsererror" ) {
 557                         jQuery.error( "Invalid XML: " + data );
 558                 }
 559
 560                 return xml;
 561         },
 562
 563         noop: function() {},
 564
 565         // Evalulates a script in a global context
 566         globalEval: function( data ) {
 567                 if ( data && rnotwhite.test(data) ) {
 568                         // Inspired by code by Andrea Giammarchi
 569                         // http://webreflection.blogspot.com/2007/08/global-scope-evaluation-and-dom.html
 570                         var head = document.getElementsByTagName("head")[0] || document.documentElement,
 571                                 script = document.createElement("script");
 572
 573                         script.type = "text/javascript";
 574
 575                         if ( jQuery.support.scriptEval() ) {
 576                                 script.appendChild( document.createTextNode( data ) );
 577                         } else {
 578                                 script.text = data;
 579                         }
 580
 581                         // Use insertBefore instead of appendChild to circumvent an IE6 bug.
 582                         // This arises when a base node is used (#2709).
 583                         head.insertBefore( script, head.firstChild );
 584                         head.removeChild( script );
 585                 }
 586         },
 587
 588         nodeName: function( elem, name ) {
 589                 return elem.nodeName && elem.nodeName.toUpperCase() === name.toUpperCase();
 590         },
 591
 592         // args is for internal usage only
 593         each: function( object, callback, args ) {
 594                 var name, i = 0,
 595                         length = object.length,
 596                         isObj = length === undefined || jQuery.isFunction(object);
 597
 598                 if ( args ) {
 599                         if ( isObj ) {
 600                                 for ( name in object ) {
 601                                         if ( callback.apply( object[ name ], args ) === false ) {
 602                                                 break;
 603                                         }
 604                                 }
 605                         } else {
 606                                 for ( ; i < length; ) {
 607                                         if ( callback.apply( object[ i++ ], args ) === false ) {
 608                                                 break;
 609                                         }
 610                                 }
 611                         }
 612
 613                 // A special, fast, case for the most common use of each
 614                 } else {
 615                         if ( isObj ) {
 616                                 for ( name in object ) {
 617                                         if ( callback.call( object[ name ], name, object[ name ] ) === false ) {
 618                                                 break;
 619                                         }
 620                                 }
 621                         } else {
 622                                 for ( var value = object[0];
 623                                         i < length && callback.call( value, i, value ) !== false; value = object[++i] ) {}
 624                         }
 625                 }
 626
 627                 return object;
 628         },
 629
 630         // Use native String.trim function wherever possible
 631         trim: trim ?
 632                 function( text ) {
 633                         return text == null ?
 634                                 "" :
 635                                 trim.call( text );
 636                 } :
 637
 638                 // Otherwise use our own trimming functionality
 639                 function( text ) {
 640                         return text == null ?
 641                                 "" :
 642                                 text.toString().replace( trimLeft, "" ).replace( trimRight, "" );
 643                 },
 644
 645         // results is for internal usage only
 646         makeArray: function( array, results ) {
 647                 var ret = results || [];
 648
 649                 if ( array != null ) {
 650                         // The window, strings (and functions) also have 'length'
 651                         // The extra typeof function check is to prevent crashes
 652                         // in Safari 2 (See: #3039)
 653                         // Tweaked logic slightly to handle Blackberry 4.7 RegExp issues #6930
 654                         var type = jQuery.type(array);
 655
 656                         if ( array.length == null || type === "string" || type === "function" || type === "regexp" || jQuery.isWindow( array ) ) {
 657                                 push.call( ret, array );
 658                         } else {
 659                                 jQuery.merge( ret, array );
 660                         }
 661                 }
 662
 663                 return ret;
 664         },
 665
 666         inArray: function( elem, array ) {
 667                 if ( array.indexOf ) {
 668                         return array.indexOf( elem );
 669                 }
 670
 671                 for ( var i = 0, length = array.length; i < length; i++ ) {
 672                         if ( array[ i ] === elem ) {
 673                                 return i;
 674                         }
 675                 }
 676
 677                 return -1;
 678         },
 679
 680         merge: function( first, second ) {
 681                 var i = first.length,
 682                         j = 0;
 683
 684                 if ( typeof second.length === "number" ) {
 685                         for ( var l = second.length; j < l; j++ ) {
 686                                 first[ i++ ] = second[ j ];
 687                         }
 688
 689                 } else {
 690                         while ( second[j] !== undefined ) {
 691                                 first[ i++ ] = second[ j++ ];
 692                         }
 693                 }
 694
 695                 first.length = i;
 696
 697                 return first;
 698         },
 699
 700         grep: function( elems, callback, inv ) {
 701                 var ret = [], retVal;
 702                 inv = !!inv;
 703
 704                 // Go through the array, only saving the items
 705                 // that pass the validator function
 706                 for ( var i = 0, length = elems.length; i < length; i++ ) {
 707                         retVal = !!callback( elems[ i ], i );
 708                         if ( inv !== retVal ) {
 709                                 ret.push( elems[ i ] );
 710                         }
 711                 }
 712
 713                 return ret;
 714         },
 715
 716         // arg is for internal usage only
 717         map: function( elems, callback, arg ) {
 718                 var ret = [], value;
 719
 720                 // Go through the array, translating each of the items to their
 721                 // new value (or values).
 722                 for ( var i = 0, length = elems.length; i < length; i++ ) {
 723                         value = callback( elems[ i ], i, arg );
 724
 725                         if ( value != null ) {
 726                                 ret[ ret.length ] = value;
 727                         }
 728                 }
 729
 730                 // Flatten any nested arrays
 731                 return ret.concat.apply( [], ret );
 732         },
 733
 734         // A global GUID counter for objects
 735         guid: 1,
 736
 737         proxy: function( fn, proxy, thisObject ) {
 738                 if ( arguments.length === 2 ) {
 739                         if ( typeof proxy === "string" ) {
 740                                 thisObject = fn;
 741                                 fn = thisObject[ proxy ];
 742                                 proxy = undefined;
 743
 744                         } else if ( proxy && !jQuery.isFunction( proxy ) ) {
 745                                 thisObject = proxy;
 746                                 proxy = undefined;
 747                         }
 748                 }
 749
 750                 if ( !proxy && fn ) {
 751                         proxy = function() {
 752                                 return fn.apply( thisObject || this, arguments );
 753                         };
 754                 }
 755
 756                 // Set the guid of unique handler to the same of original handler, so it can be removed
 757                 if ( fn ) {
 758                         proxy.guid = fn.guid = fn.guid || proxy.guid || jQuery.guid++;
 759                 }
 760
 761                 // So proxy can be declared as an argument
 762                 return proxy;
 763         },
 764
 765         // Mutifunctional method to get and set values to a collection
 766         // The value/s can be optionally by executed if its a function
 767         access: function( elems, key, value, exec, fn, pass ) {
 768                 var length = elems.length;
 769
 770                 // Setting many attributes
 771                 if ( typeof key === "object" ) {
 772                         for ( var k in key ) {
 773                                 jQuery.access( elems, k, key[k], exec, fn, value );
 774                         }
 775                         return elems;
 776                 }
 777
 778                 // Setting one attribute
 779                 if ( value !== undefined ) {
 780                         // Optionally, function values get executed if exec is true
 781                         exec = !pass && exec && jQuery.isFunction(value);
 782
 783                         for ( var i = 0; i < length; i++ ) {
 784                                 fn( elems[i], key, exec ? value.call( elems[i], i, fn( elems[i], key ) ) : value, pass );
 785                         }
 786
 787                         return elems;
 788                 }
 789
 790                 // Getting an attribute
 791                 return length ? fn( elems[0], key ) : undefined;
 792         },
 793
 794         now: function() {
 795                 return (new Date()).getTime();
 796         },
 797
 798         // Create a simple deferred (one callbacks list)
 799         _Deferred: function() {
 800
 801                 var // callbacks list
 802                         callbacks = [],
 803                         // stored [ context , args ]
 804                         fired,
 805                         // to avoid firing when already doing so
 806                         firing,
 807                         // flag to know if the deferred has been cancelled
 808                         cancelled,
 809                         // the deferred itself
 810                         deferred  = {
 811
 812                                 // done( f1, f2, ...)
 813                                 done: function () {
 814
 815                                         if ( ! cancelled ) {
 816
 817                                                 var args = arguments,
 818                                                         i,
 819                                                         length,
 820                                                         elem,
 821                                                         type,
 822                                                         _fired;
 823
 824                                                 if ( fired ) {
 825                                                         _fired = fired;
 826                                                         fired = 0;
 827                                                 }
 828
 829                                                 for ( i = 0, length = args.length ; i < length ; i++ ) {
 830                                                         elem = args[ i ];
 831                                                         type = jQuery.type( elem );
 832                                                         if ( type === "array" ) {
 833                                                                 deferred.done.apply( deferred , elem );
 834                                                         } else if ( type === "function" ) {
 835                                                                 callbacks.push( elem );
 836                                                         }
 837                                                 }
 838
 839                                                 if ( _fired ) {
 840                                                         deferred.resolveWith( _fired[ 0 ] , _fired[ 1 ] );
 841                                                 }
 842                                         }
 843
 844                                         return this;
 845                                 },
 846
 847                                 // resolve with given context and args
 848                                 resolveWith: function( context , args ) {
 849                                         if ( ! cancelled && ! fired && ! firing ) {
 850
 851                                                 firing = 1;
 852
 853                                                 try {
 854                                                         while( callbacks[ 0 ] ) {
 855                                                                 callbacks.shift().apply( context , args );
 856                                                         }
 857                                                 }
 858                                                 finally {
 859                                                         fired = [ context , args ];
 860                                                         firing = 0;
 861                                                 }
 862                                         }
 863                                         return this;
 864                                 },
 865
 866                                 // resolve with this as context and given arguments
 867                                 resolve: function() {
 868                                         deferred.resolveWith( jQuery.isFunction( this.promise ) ? this.promise() : this , arguments );
 869                                         return this;
 870                                 },
 871
 872                                 // Has this deferred been resolved?
 873                                 isResolved: function() {
 874                                         return !!( firing || fired );
 875                                 },
 876
 877                                 // Cancel
 878                                 cancel: function() {
 879                                         cancelled = 1;
 880                                         callbacks = [];
 881                                         return this;
 882                                 }
 883                         };
 884
 885                 return deferred;
 886         },
 887
 888         // Full fledged deferred (two callbacks list)
 889         // Typical success/error system
 890         Deferred: function( func ) {
 891
 892                 var deferred = jQuery._Deferred(),
 893                         failDeferred = jQuery._Deferred(),
 894                         promise;
 895
 896                 // Add errorDeferred methods, then and promise
 897                 jQuery.extend( deferred , {
 898
 899                         then: function( doneCallbacks , failCallbacks ) {
 900                                 deferred.done( doneCallbacks ).fail( failCallbacks );
 901                                 return this;
 902                         },
 903                         fail: failDeferred.done,
 904                         rejectWith: failDeferred.resolveWith,
 905                         reject: failDeferred.resolve,
 906                         isRejected: failDeferred.isResolved,
 907                         // Get a promise for this deferred
 908                         // If obj is provided, the promise aspect is added to the object
 909                         // (i is used internally)
 910                         promise: function( obj , i ) {
 911                                 if ( obj == null ) {
 912                                         if ( promise ) {
 913                                                 return promise;
 914                                         }
 915                                         promise = obj = {};
 916                                 }
 917                                 i = promiseMethods.length;
 918                                 while( i-- ) {
 919                                         obj[ promiseMethods[ i ] ] = deferred[ promiseMethods[ i ] ];
 920                                 }
 921                                 return obj;
 922                         }
 923
 924                 } );
 925
 926                 // Make sure only one callback list will be used
 927                 deferred.then( failDeferred.cancel , deferred.cancel );
 928
 929                 // Unexpose cancel
 930                 delete deferred.cancel;
 931
 932                 // Call given func if any
 933                 if ( func ) {
 934                         func.call( deferred , deferred );
 935                 }
 936
 937                 return deferred;
 938         },
 939
 940         // Deferred helper
 941         when: function( object ) {
 942                 var args = arguments,
 943                         length = args.length,
 944                         deferred = length <= 1 && object && jQuery.isFunction( object.promise ) ?
 945                                 object :
 946                                 jQuery.Deferred(),
 947                         promise = deferred.promise(),
 948                         resolveArray;
 949
 950                 if ( length > 1 ) {
 951                         resolveArray = new Array( length );
 952                         jQuery.each( args, function( index, element, args ) {
 953                                 jQuery.when( element ).done( function( value ) {
 954                                         args = arguments;
 955                                         resolveArray[ index ] = args.length > 1 ? slice.call( args , 0 ) : value;
 956                                         if( ! --length ) {
 957                                                 deferred.resolveWith( promise, resolveArray );
 958                                         }
 959                                 }).fail( function() {
 960                                         deferred.rejectWith( promise, arguments );
 961                                 });
 962                                 return !deferred.isRejected();
 963                         });
 964                 } else if ( deferred !== object ) {
 965                         deferred.resolve( object );
 966                 }
 967                 return promise;
 968         },
 969
 970         // Use of jQuery.browser is frowned upon.
 971         // More details: http://docs.jquery.com/Utilities/jQuery.browser
 972         uaMatch: function( ua ) {
 973                 ua = ua.toLowerCase();
 974
 975                 var match = rwebkit.exec( ua ) ||
 976                         ropera.exec( ua ) ||
 977                         rmsie.exec( ua ) ||
 978                         ua.indexOf("compatible") < 0 && rmozilla.exec( ua ) ||
 979                         [];
 980
 981                 return { browser: match[1] || "", version: match[2] || "0" };
 982         },
 983
 984         subclass: function(){
 985                 function jQuerySubclass( selector, context ) {
 986                         return new jQuerySubclass.fn.init( selector, context );
 987                 }
 988                 jQuerySubclass.superclass = this;
 989                 jQuerySubclass.fn = jQuerySubclass.prototype = this();
 990                 jQuerySubclass.fn.constructor = jQuerySubclass;
 991                 jQuerySubclass.subclass = this.subclass;
 992                 jQuerySubclass.fn.init = function init( selector, context ) {
 993                         if (context && context instanceof jQuery && !(context instanceof jQuerySubclass)){
 994                                 context = jQuerySubclass(context);
 995                         }
 996                         return jQuery.fn.init.call( this, selector, context, rootjQuerySubclass );
 997                 };
 998                 jQuerySubclass.fn.init.prototype = jQuerySubclass.fn;
 999                 var rootjQuerySubclass = jQuerySubclass(document);
1000                 return jQuerySubclass;
1001         },
1002
1003         browser: {}
1004 });
1005
1006 // Create readyList deferred
1007 readyList = jQuery._Deferred();
1008
1009 // Populate the class2type map
1010 jQuery.each("Boolean Number String Function Array Date RegExp Object".split(" "), function(i, name) {
1011         class2type[ "[object " + name + "]" ] = name.toLowerCase();
1012 });
1013
1014 browserMatch = jQuery.uaMatch( userAgent );
1015 if ( browserMatch.browser ) {
1016         jQuery.browser[ browserMatch.browser ] = true;
1017         jQuery.browser.version = browserMatch.version;
1018 }
1019
1020 // Deprecated, use jQuery.browser.webkit instead
1021 if ( jQuery.browser.webkit ) {
1022         jQuery.browser.safari = true;
1023 }
1024
1025 if ( indexOf ) {
1026         jQuery.inArray = function( elem, array ) {
1027                 return indexOf.call( array, elem );
1028         };
1029 }
1030
1031 // IE doesn't match non-breaking spaces with \s
1032 if ( rnotwhite.test( "\xA0" ) ) {
1033         trimLeft = /^[\s\xA0]+/;
1034         trimRight = /[\s\xA0]+$/;
1035 }
1036
1037 // All jQuery objects should point back to these
1038 rootjQuery = jQuery(document);
1039
1040 // Cleanup functions for the document ready method
1041 if ( document.addEventListener ) {
1042         DOMContentLoaded = function() {
1043                 document.removeEventListener( "DOMContentLoaded", DOMContentLoaded, false );
1044                 jQuery.ready();
1045         };
1046
1047 } else if ( document.attachEvent ) {
1048         DOMContentLoaded = function() {
1049                 // Make sure body exists, at least, in case IE gets a little overzealous (ticket #5443).
1050                 if ( document.readyState === "complete" ) {
1051                         document.detachEvent( "onreadystatechange", DOMContentLoaded );
1052                         jQuery.ready();
1053                 }
1054         };
1055 }
1056
1057 // The DOM ready check for Internet Explorer
1058 function doScrollCheck() {
1059         if ( jQuery.isReady ) {
1060                 return;
1061         }
1062
1063         try {
1064                 // If IE is used, use the trick by Diego Perini
1065                 // http://javascript.nwbox.com/IEContentLoaded/
1066                 document.documentElement.doScroll("left");
1067         } catch(e) {
1068                 setTimeout( doScrollCheck, 1 );
1069                 return;
1070         }
1071
1072         // and execute any waiting functions
1073         jQuery.ready();
1074 }
1075
1076 // Expose jQuery to the global object
1077 return (window.jQuery = window.$ = jQuery);
1078
1079 })();