+jQuery.Event = function( src ){
+ // Allow instantiation without the 'new' keyword
+ if( !this.preventDefault )
+ return new jQuery.Event(src);
+
+ // Event object
+ if( src && src.type ){
+ this.originalEvent = src;
+ this.type = src.type;
+ this.timeStamp = src.timeStamp;
+ // Event type
+ }else
+ this.type = src;
+
+ if( !this.timeStamp )
+ this.timeStamp = now();
+
+ // Mark it as fixed
+ this[expando] = true;
+};
+
+function returnFalse(){
+ return false;
+}
+function returnTrue(){
+ return true;
+}
+
+// jQuery.Event is based on DOM3 Events as specified by the ECMAScript Language Binding
+// http://www.w3.org/TR/2003/WD-DOM-Level-3-Events-20030331/ecma-script-binding.html
+jQuery.Event.prototype = {
+ preventDefault: function() {
+ this.isDefaultPrevented = returnTrue;
+
+ var e = this.originalEvent;
+ if( !e )
+ return;
+ // if preventDefault exists run it on the original event
+ if (e.preventDefault)
+ e.preventDefault();
+ // otherwise set the returnValue property of the original event to false (IE)
+ e.returnValue = false;
+ },
+ stopPropagation: function() {
+ this.isPropagationStopped = returnTrue;
+
+ var e = this.originalEvent;
+ if( !e )
+ return;
+ // if stopPropagation exists run it on the original event
+ if (e.stopPropagation)
+ e.stopPropagation();
+ // otherwise set the cancelBubble property of the original event to true (IE)
+ e.cancelBubble = true;
+ },
+ stopImmediatePropagation:function(){
+ this.isImmediatePropagationStopped = returnTrue;
+ this.stopPropagation();
+ },
+ isDefaultPrevented: returnFalse,
+ isPropagationStopped: returnFalse,
+ isImmediatePropagationStopped: returnFalse
+};
+// Checks if an event happened on an element within another element
+// Used in jQuery.event.special.mouseenter and mouseleave handlers
+var withinElement = function(event) {
+ // Check if mouse(over|out) are still within the same parent element
+ var parent = event.relatedTarget;
+ // Traverse up the tree
+ while ( parent && parent != this )
+ try { parent = parent.parentNode; }
+ catch(e) { parent = this; }
+
+ if( parent != this ){
+ // set the correct event type
+ event.type = event.data;
+ // handle event if we actually just moused on to a non sub-element
+ jQuery.event.handle.apply( this, arguments );
+ }
+};
+
+jQuery.each({
+ mouseover: 'mouseenter',
+ mouseout: 'mouseleave'
+}, function( orig, fix ){
+ jQuery.event.special[ fix ] = {
+ setup: function(){
+ jQuery.event.add( this, orig, withinElement, fix );
+ },
+ teardown: function(){
+ jQuery.event.remove( this, orig, withinElement );
+ }
+ };
+});
+