src/event.js

   1 /*
   2  * A number of helper functions used for managing events.
   3  * Many of the ideas behind this code originated from
   4  * Dean Edwards' addEvent library.
   5  */
   6 jQuery.event = {
   7
   8         // Bind an event to an element
   9         // Original by Dean Edwards
  10         add: function(elem, types, handler, data) {
  11                 if ( elem.nodeType == 3 || elem.nodeType == 8 )
  12                         return;
  13
  14                 // For whatever reason, IE has trouble passing the window object
  15                 // around, causing it to be cloned in the process
  16                 if ( elem.setInterval && ( elem != window && !elem.frameElement ) )
  17                         elem = window;
  18
  19                 // Make sure that the function being executed has a unique ID
  20                 if ( !handler.guid )
  21                         handler.guid = this.guid++;
  22
  23                 // if data is passed, bind to handler
  24                 if ( data !== undefined ) {
  25                         // Create temporary function pointer to original handler
  26                         var fn = handler;
  27
  28                         // Create unique handler function, wrapped around original handler
  29                         handler = this.proxy( fn );
  30
  31                         // Store data in unique handler
  32                         handler.data = data;
  33                 }
  34
  35                 // Init the element's event structure
  36                 var events = jQuery.data(elem, "events") || jQuery.data(elem, "events", {}),
  37                         handle = jQuery.data(elem, "handle") || jQuery.data(elem, "handle", function(){
  38                                 // Handle the second event of a trigger and when
  39                                 // an event is called after a page has unloaded
  40                                 return typeof jQuery !== "undefined" && !jQuery.event.triggered ?
  41                                         jQuery.event.handle.apply(arguments.callee.elem, arguments) :
  42                                         undefined;
  43                         });
  44                 // Add elem as a property of the handle function
  45                 // This is to prevent a memory leak with non-native
  46                 // event in IE.
  47                 handle.elem = elem;
  48
  49                 // Handle multiple events separated by a space
  50                 // jQuery(...).bind("mouseover mouseout", fn);
  51                 jQuery.each(types.split(/\s+/), function(index, type) {
  52                         // Namespaced event handlers
  53                         var namespaces = type.split(".");
  54                         type = namespaces.shift();
  55                         handler.type = namespaces.slice().sort().join(".");
  56
  57                         // Get the current list of functions bound to this event
  58                         var handlers = events[type];
  59
  60                         if ( jQuery.event.specialAll[type] )
  61                                 jQuery.event.specialAll[type].setup.call(elem, data, namespaces);
  62
  63                         // Init the event handler queue
  64                         if (!handlers) {
  65                                 handlers = events[type] = {};
  66
  67                                 // Check for a special event handler
  68                                 // Only use addEventListener/attachEvent if the special
  69                                 // events handler returns false
  70                                 if ( !jQuery.event.special[type] || jQuery.event.special[type].setup.call(elem, data, namespaces) === false ) {
  71                                         // Bind the global event handler to the element
  72                                         if (elem.addEventListener)
  73                                                 elem.addEventListener(type, handle, false);
  74                                         else if (elem.attachEvent)
  75                                                 elem.attachEvent("on" + type, handle);
  76                                 }
  77                         }
  78
  79                         // Add the function to the element's handler list
  80                         handlers[handler.guid] = handler;
  81
  82                         // Keep track of which events have been used, for global triggering
  83                         jQuery.event.global[type] = true;
  84                 });
  85
  86                 // Nullify elem to prevent memory leaks in IE
  87                 elem = null;
  88         },
  89
  90         guid: 1,
  91         global: {},
  92
  93         // Detach an event or set of events from an element
  94         remove: function(elem, types, handler) {
  95                 // don't do events on text and comment nodes
  96                 if ( elem.nodeType == 3 || elem.nodeType == 8 )
  97                         return;
  98
  99                 var events = jQuery.data(elem, "events"), ret, index;
 100
 101                 if ( events ) {
 102                         // Unbind all events for the element
 103                         if ( types === undefined || (typeof types === "string" && types.charAt(0) == ".") )
 104                                 for ( var type in events )
 105                                         this.remove( elem, type + (types || "") );
 106                         else {
 107                                 // types is actually an event object here
 108                                 if ( types.type ) {
 109                                         handler = types.handler;
 110                                         types = types.type;
 111                                 }
 112
 113                                 // Handle multiple events seperated by a space
 114                                 // jQuery(...).unbind("mouseover mouseout", fn);
 115                                 jQuery.each(types.split(/\s+/), function(index, type){
 116                                         // Namespaced event handlers
 117                                         var namespaces = type.split(".");
 118                                         type = namespaces.shift();
 119                                         var namespace = new RegExp("(^|\\.)" + namespaces.slice().sort().join(".*\\.") + "(\\.|$)");
 120
 121                                         if ( events[type] ) {
 122                                                 // remove the given handler for the given type
 123                                                 if ( handler )
 124                                                         delete events[type][handler.guid];
 125
 126                                                 // remove all handlers for the given type
 127                                                 else
 128                                                         for ( var handle in events[type] )
 129                                                                 // Handle the removal of namespaced events
 130                                                                 if ( namespace.test(events[type][handle].type) )
 131                                                                         delete events[type][handle];
 132
 133                                                 if ( jQuery.event.specialAll[type] )
 134                                                         jQuery.event.specialAll[type].teardown.call(elem, namespaces);
 135
 136                                                 // remove generic event handler if no more handlers exist
 137                                                 for ( ret in events[type] ) break;
 138                                                 if ( !ret ) {
 139                                                         if ( !jQuery.event.special[type] || jQuery.event.special[type].teardown.call(elem, namespaces) === false ) {
 140                                                                 if (elem.removeEventListener)
 141                                                                         elem.removeEventListener(type, jQuery.data(elem, "handle"), false);
 142                                                                 else if (elem.detachEvent)
 143                                                                         elem.detachEvent("on" + type, jQuery.data(elem, "handle"));
 144                                                         }
 145                                                         ret = null;
 146                                                         delete events[type];
 147                                                 }
 148                                         }
 149                                 });
 150                         }
 151
 152                         // Remove the expando if it's no longer used
 153                         for ( ret in events ) break;
 154                         if ( !ret ) {
 155                                 var handle = jQuery.data( elem, "handle" );
 156                                 if ( handle ) handle.elem = null;
 157                                 jQuery.removeData( elem, "events" );
 158                                 jQuery.removeData( elem, "handle" );
 159                         }
 160                 }
 161         },
 162
 163         // bubbling is internal
 164         trigger: function( event, data, elem, bubbling ) {
 165                 // Event object or event type
 166                 var type = event.type || event;
 167
 168                 if( !bubbling ){
 169                         event = typeof event === "object" ?
 170                                 // jQuery.Event object
 171                                 event[expando] ? event :
 172                                 // Object literal
 173                                 jQuery.extend( jQuery.Event(type), event ) :
 174                                 // Just the event type (string)
 175                                 jQuery.Event(type);
 176
 177                         if ( type.indexOf("!") >= 0 ) {
 178                                 event.type = type = type.slice(0, -1);
 179                                 event.exclusive = true;
 180                         }
 181
 182                         // Handle a global trigger
 183                         if ( !elem ) {
 184                                 // Don't bubble custom events when global (to avoid too much overhead)
 185                                 event.stopPropagation();
 186                                 // Only trigger if we've ever bound an event for it
 187                                 if ( this.global[type] )
 188                                         jQuery.each( jQuery.cache, function(){
 189                                                 if ( this.events && this.events[type] )
 190                                                         jQuery.event.trigger( event, data, this.handle.elem );
 191                                         });
 192                         }
 193
 194                         // Handle triggering a single element
 195
 196                         // don't do events on text and comment nodes
 197                         if ( !elem || elem.nodeType == 3 || elem.nodeType == 8 )
 198                                 return undefined;
 199
 200                         // Clean up in case it is reused
 201                         event.result = undefined;
 202                         event.target = elem;
 203
 204                         // Clone the incoming data, if any
 205                         data = jQuery.makeArray(data);
 206                         data.unshift( event );
 207                 }
 208
 209                 event.currentTarget = elem;
 210
 211                 // Trigger the event, it is assumed that "handle" is a function
 212                 var handle = jQuery.data(elem, "handle");
 213                 if ( handle )
 214                         handle.apply( elem, data );
 215
 216                 // Handle triggering native .onfoo handlers (and on links since we don't call .click() for links)
 217                 if ( (!elem[type] || (jQuery.nodeName(elem, 'a') && type == "click")) && elem["on"+type] && elem["on"+type].apply( elem, data ) === false )
 218                         event.result = false;
 219
 220                 // Trigger the native events (except for clicks on links)
 221                 if ( !bubbling && elem[type] && !event.isDefaultPrevented() && !(jQuery.nodeName(elem, 'a') && type == "click") ) {
 222                         this.triggered = true;
 223                         try {
 224                                 elem[ type ]();
 225                         // prevent IE from throwing an error for some hidden elements
 226                         } catch (e) {}
 227                 }
 228
 229                 this.triggered = false;
 230
 231                 if ( !event.isPropagationStopped() ) {
 232                         var parent = elem.parentNode || elem.ownerDocument;
 233                         if ( parent )
 234                                 jQuery.event.trigger(event, data, parent, true);
 235                 }
 236         },
 237
 238         handle: function(event) {
 239                 // returned undefined or false
 240                 var all, handlers;
 241
 242                 event = arguments[0] = jQuery.event.fix( event || window.event );
 243                 event.currentTarget = this;
 244
 245                 // Namespaced event handlers
 246                 var namespaces = event.type.split(".");
 247                 event.type = namespaces.shift();
 248
 249                 // Cache this now, all = true means, any handler
 250                 all = !namespaces.length && !event.exclusive;
 251
 252                 var namespace = new RegExp("(^|\\.)" + namespaces.slice().sort().join(".*\\.") + "(\\.|$)");
 253
 254                 handlers = ( jQuery.data(this, "events") || {} )[event.type];
 255
 256                 for ( var j in handlers ) {
 257                         var handler = handlers[j];
 258
 259                         // Filter the functions by class
 260                         if ( all || namespace.test(handler.type) ) {
 261                                 // Pass in a reference to the handler function itself
 262                                 // So that we can later remove it
 263                                 event.handler = handler;
 264                                 event.data = handler.data;
 265
 266                                 var ret = handler.apply(this, arguments);
 267
 268                                 if( ret !== undefined ){
 269                                         event.result = ret;
 270                                         if ( ret === false ) {
 271                                                 event.preventDefault();
 272                                                 event.stopPropagation();
 273                                         }
 274                                 }
 275
 276                                 if( event.isImmediatePropagationStopped() )
 277                                         break;
 278
 279                         }
 280                 }
 281         },
 282
 283         props: "altKey attrChange attrName bubbles button cancelable charCode clientX clientY ctrlKey currentTarget data detail eventPhase fromElement handler keyCode layerX layerY metaKey newValue offsetX offsetY originalTarget pageX pageY prevValue relatedNode relatedTarget screenX screenY shiftKey srcElement target toElement view wheelDelta which".split(" "),
 284
 285         fix: function(event) {
 286                 if ( event[expando] )
 287                         return event;
 288
 289                 // store a copy of the original event object
 290                 // and "clone" to set read-only properties
 291                 var originalEvent = event;
 292                 event = jQuery.Event( originalEvent );
 293
 294                 for ( var i = this.props.length, prop; i; ){
 295                         prop = this.props[ --i ];
 296                         event[ prop ] = originalEvent[ prop ];
 297                 }
 298
 299                 // Fix target property, if necessary
 300                 if ( !event.target )
 301                         event.target = event.srcElement || document; // Fixes #1925 where srcElement might not be defined either
 302
 303                 // check if target is a textnode (safari)
 304                 if ( event.target.nodeType == 3 )
 305                         event.target = event.target.parentNode;
 306
 307                 // Add relatedTarget, if necessary
 308                 if ( !event.relatedTarget && event.fromElement )
 309                         event.relatedTarget = event.fromElement == event.target ? event.toElement : event.fromElement;
 310
 311                 // Calculate pageX/Y if missing and clientX/Y available
 312                 if ( event.pageX == null && event.clientX != null ) {
 313                         var doc = document.documentElement, body = document.body;
 314                         event.pageX = event.clientX + (doc && doc.scrollLeft || body && body.scrollLeft || 0) - (doc.clientLeft || 0);
 315                         event.pageY = event.clientY + (doc && doc.scrollTop || body && body.scrollTop || 0) - (doc.clientTop || 0);
 316                 }
 317
 318                 // Add which for key events
 319                 if ( !event.which && ((event.charCode || event.charCode === 0) ? event.charCode : event.keyCode) )
 320                         event.which = event.charCode || event.keyCode;
 321
 322                 // Add metaKey to non-Mac browsers (use ctrl for PC's and Meta for Macs)
 323                 if ( !event.metaKey && event.ctrlKey )
 324                         event.metaKey = event.ctrlKey;
 325
 326                 // Add which for click: 1 == left; 2 == middle; 3 == right
 327                 // Note: button is not normalized, so don't use it
 328                 if ( !event.which && event.button )
 329                         event.which = (event.button & 1 ? 1 : ( event.button & 2 ? 3 : ( event.button & 4 ? 2 : 0 ) ));
 330
 331                 return event;
 332         },
 333
 334         proxy: function( fn, proxy ){
 335                 proxy = proxy || function(){ return fn.apply(this, arguments); };
 336                 // Set the guid of unique handler to the same of original handler, so it can be removed
 337                 proxy.guid = fn.guid = fn.guid || proxy.guid || this.guid++;
 338                 // So proxy can be declared as an argument
 339                 return proxy;
 340         },
 341
 342         special: {
 343                 ready: {
 344                         // Make sure the ready event is setup
 345                         setup: bindReady,
 346                         teardown: function() {}
 347                 }
 348         },
 349
 350         specialAll: {
 351                 live: {
 352                         setup: function( selector, namespaces ){
 353                                 jQuery.event.add( this, namespaces[0], liveHandler );
 354                         },
 355                         teardown:  function( namespaces ){
 356                                 if ( namespaces.length ) {
 357                                         var remove = 0, name = new RegExp("(^|\\.)" + namespaces[0] + "(\\.|$)");
 358
 359                                         jQuery.each( (jQuery.data(this, "events").live || {}), function(){
 360                                                 if ( name.test(this.type) )
 361                                                         remove++;
 362                                         });
 363
 364                                         if ( remove < 1 )
 365                                                 jQuery.event.remove( this, namespaces[0], liveHandler );
 366                                 }
 367                         }
 368                 }
 369         }
 370 };
 371
 372 jQuery.Event = function( src ){
 373         // Allow instantiation without the 'new' keyword
 374         if( !this.preventDefault )
 375                 return new jQuery.Event(src);
 376
 377         // Event object
 378         if( src && src.type ){
 379                 this.originalEvent = src;
 380                 this.type = src.type;
 381         // Event type
 382         }else
 383                 this.type = src;
 384
 385         // timeStamp is buggy for some events on Firefox(#3843)
 386         // So we won't rely on the native value
 387         this.timeStamp = now();
 388
 389         // Mark it as fixed
 390         this[expando] = true;
 391 };
 392
 393 function returnFalse(){
 394         return false;
 395 }
 396 function returnTrue(){
 397         return true;
 398 }
 399
 400 // jQuery.Event is based on DOM3 Events as specified by the ECMAScript Language Binding
 401 // http://www.w3.org/TR/2003/WD-DOM-Level-3-Events-20030331/ecma-script-binding.html
 402 jQuery.Event.prototype = {
 403         preventDefault: function() {
 404                 this.isDefaultPrevented = returnTrue;
 405
 406                 var e = this.originalEvent;
 407                 if( !e )
 408                         return;
 409                 // if preventDefault exists run it on the original event
 410                 if (e.preventDefault)
 411                         e.preventDefault();
 412                 // otherwise set the returnValue property of the original event to false (IE)
 413                 e.returnValue = false;
 414         },
 415         stopPropagation: function() {
 416                 this.isPropagationStopped = returnTrue;
 417
 418                 var e = this.originalEvent;
 419                 if( !e )
 420                         return;
 421                 // if stopPropagation exists run it on the original event
 422                 if (e.stopPropagation)
 423                         e.stopPropagation();
 424                 // otherwise set the cancelBubble property of the original event to true (IE)
 425                 e.cancelBubble = true;
 426         },
 427         stopImmediatePropagation:function(){
 428                 this.isImmediatePropagationStopped = returnTrue;
 429                 this.stopPropagation();
 430         },
 431         isDefaultPrevented: returnFalse,
 432         isPropagationStopped: returnFalse,
 433         isImmediatePropagationStopped: returnFalse
 434 };
 435 // Checks if an event happened on an element within another element
 436 // Used in jQuery.event.special.mouseenter and mouseleave handlers
 437 var withinElement = function(event) {
 438         // Check if mouse(over|out) are still within the same parent element
 439         var parent = event.relatedTarget;
 440         // Traverse up the tree
 441         while ( parent && parent != this )
 442                 try { parent = parent.parentNode; }
 443                 catch(e) { parent = this; }
 444
 445         if( parent != this ){
 446                 // set the correct event type
 447                 event.type = event.data;
 448                 // handle event if we actually just moused on to a non sub-element
 449                 jQuery.event.handle.apply( this, arguments );
 450         }
 451 };
 452
 453 jQuery.each({
 454         mouseover: 'mouseenter',
 455         mouseout: 'mouseleave'
 456 }, function( orig, fix ){
 457         jQuery.event.special[ fix ] = {
 458                 setup: function(){
 459                         jQuery.event.add( this, orig, withinElement, fix );
 460                 },
 461                 teardown: function(){
 462                         jQuery.event.remove( this, orig, withinElement );
 463                 }
 464         };
 465 });
 466
 467 jQuery.fn.extend({
 468         bind: function( type, data, fn ) {
 469                 return type == "unload" ? this.one(type, data, fn) : this.each(function(){
 470                         jQuery.event.add( this, type, fn || data, fn && data );
 471                 });
 472         },
 473
 474         one: function( type, data, fn ) {
 475                 var one = jQuery.event.proxy( fn || data, function(event) {
 476                         jQuery(this).unbind(event, one);
 477                         return (fn || data).apply( this, arguments );
 478                 });
 479                 return this.each(function(){
 480                         jQuery.event.add( this, type, one, fn && data);
 481                 });
 482         },
 483
 484         unbind: function( type, fn ) {
 485                 return this.each(function(){
 486                         jQuery.event.remove( this, type, fn );
 487                 });
 488         },
 489
 490         trigger: function( type, data ) {
 491                 return this.each(function(){
 492                         jQuery.event.trigger( type, data, this );
 493                 });
 494         },
 495
 496         triggerHandler: function( type, data ) {
 497                 if( this[0] ){
 498                         var event = jQuery.Event(type);
 499                         event.preventDefault();
 500                         event.stopPropagation();
 501                         jQuery.event.trigger( event, data, this[0] );
 502                         return event.result;
 503                 }
 504         },
 505
 506         toggle: function( fn ) {
 507                 // Save reference to arguments for access in closure
 508                 var args = arguments, i = 1;
 509
 510                 // link all the functions, so any of them can unbind this click handler
 511                 while( i < args.length )
 512                         jQuery.event.proxy( fn, args[i++] );
 513
 514                 return this.click( jQuery.event.proxy( fn, function(event) {
 515                         // Figure out which function to execute
 516                         this.lastToggle = ( this.lastToggle || 0 ) % i;
 517
 518                         // Make sure that clicks stop
 519                         event.preventDefault();
 520
 521                         // and execute the function
 522                         return args[ this.lastToggle++ ].apply( this, arguments ) || false;
 523                 }));
 524         },
 525
 526         hover: function(fnOver, fnOut) {
 527                 return this.mouseenter(fnOver).mouseleave(fnOut);
 528         },
 529
 530         ready: function(fn) {
 531                 // Attach the listeners
 532                 bindReady();
 533
 534                 // If the DOM is already ready
 535                 if ( jQuery.isReady )
 536                         // Execute the function immediately
 537                         fn.call( document, jQuery );
 538
 539                 // Otherwise, remember the function for later
 540                 else
 541                         // Add the function to the wait list
 542                         jQuery.readyList.push( fn );
 543
 544                 return this;
 545         },
 546
 547         live: function( type, fn ){
 548                 var proxy = jQuery.event.proxy( fn );
 549                 proxy.guid += this.selector + type;
 550
 551                 jQuery( this.context ).bind( liveConvert(type, this.selector), this.selector, proxy );
 552
 553                 return this;
 554         },
 555
 556         die: function( type, fn ){
 557                 jQuery( this.context ).unbind( liveConvert(type, this.selector), fn ? { guid: fn.guid + this.selector + type } : null );
 558                 return this;
 559         }
 560 });
 561
 562 function liveHandler( event ){
 563         var check = new RegExp("(^|\\.)" + event.type + "(\\.|$)"),
 564                 stop = true,
 565                 elems = [];
 566
 567         jQuery.each(jQuery.data(this, "events").live || [], function(i, fn){
 568                 if ( check.test(fn.type) ) {
 569                         var elem = jQuery(event.target).closest(fn.data)[0];
 570                         if ( elem )
 571                                 elems.push({ elem: elem, fn: fn });
 572                 }
 573         });
 574
 575         elems.sort(function(a,b) {
 576                 return jQuery.data(a.elem, "closest") - jQuery.data(b.elem, "closest");
 577         });
 578
 579         jQuery.each(elems, function(){
 580                 event.currentTarget = this.elem;
 581                 if ( this.fn.call(this.elem, event, this.fn.data) === false )
 582                         return (stop = false);
 583         });
 584
 585         return stop;
 586 }
 587
 588 function liveConvert(type, selector){
 589         return ["live", type, selector.replace(/\./g, "`").replace(/ /g, "|")].join(".");
 590 }
 591
 592 jQuery.extend({
 593         isReady: false,
 594         readyList: [],
 595         // Handle when the DOM is ready
 596         ready: function() {
 597                 // Make sure that the DOM is not already loaded
 598                 if ( !jQuery.isReady ) {
 599                         // Remember that the DOM is ready
 600                         jQuery.isReady = true;
 601
 602                         // If there are functions bound, to execute
 603                         if ( jQuery.readyList ) {
 604                                 // Execute all of them
 605                                 jQuery.each( jQuery.readyList, function(){
 606                                         this.call( document, jQuery );
 607                                 });
 608
 609                                 // Reset the list of functions
 610                                 jQuery.readyList = null;
 611                         }
 612
 613                         // Trigger any bound ready events
 614                         jQuery(document).triggerHandler("ready");
 615                 }
 616         }
 617 });
 618
 619 var readyBound = false;
 620
 621 function bindReady(){
 622         if ( readyBound ) return;
 623         readyBound = true;
 624
 625         // Mozilla, Opera and webkit nightlies currently support this event
 626         if ( document.addEventListener ) {
 627                 // Use the handy event callback
 628                 document.addEventListener( "DOMContentLoaded", function(){
 629                         document.removeEventListener( "DOMContentLoaded", arguments.callee, false );
 630                         jQuery.ready();
 631                 }, false );
 632
 633         // If IE event model is used
 634         } else if ( document.attachEvent ) {
 635                 // ensure firing before onload,
 636                 // maybe late but safe also for iframes
 637                 document.attachEvent("onreadystatechange", function(){
 638                         if ( document.readyState === "complete" ) {
 639                                 document.detachEvent( "onreadystatechange", arguments.callee );
 640                                 jQuery.ready();
 641                         }
 642                 });
 643
 644                 // If IE and not an iframe
 645                 // continually check to see if the document is ready
 646                 if ( document.documentElement.doScroll && window == window.top ) (function(){
 647                         if ( jQuery.isReady ) return;
 648
 649                         try {
 650                                 // If IE is used, use the trick by Diego Perini
 651                                 // http://javascript.nwbox.com/IEContentLoaded/
 652                                 document.documentElement.doScroll("left");
 653                         } catch( error ) {
 654                                 setTimeout( arguments.callee, 0 );
 655                                 return;
 656                         }
 657
 658                         // and execute any waiting functions
 659                         jQuery.ready();
 660                 })();
 661         }
 662
 663         // A fallback to window.onload, that will always work
 664         jQuery.event.add( window, "load", jQuery.ready );
 665 }
 666
 667 jQuery.each( ("blur,focus,load,resize,scroll,unload,click,dblclick," +
 668         "mousedown,mouseup,mousemove,mouseover,mouseout,mouseenter,mouseleave," +
 669         "change,select,submit,keydown,keypress,keyup,error").split(","), function(i, name){
 670
 671         // Handle event binding
 672         jQuery.fn[name] = function(fn){
 673                 return fn ? this.bind(name, fn) : this.trigger(name);
 674         };
 675 });
 676
 677 // Prevent memory leaks in IE
 678 // And prevent errors on refresh with events like mouseover in other browsers
 679 // Window isn't included so as not to unbind existing unload events
 680 // More info:
 681 //  - http://isaacschlueter.com/2006/10/msie-memory-leaks/
 682 //  - https://bugzilla.mozilla.org/show_bug.cgi?id=252542
 683 jQuery( window ).bind( 'unload', function(){
 684         for ( var id in jQuery.cache )
 685                 // Skip the window
 686                 if ( id != 1 && jQuery.cache[ id ].handle )
 687                         jQuery.event.remove( jQuery.cache[ id ].handle.elem );
 688 });