+ teardown: function( namespaces, eventHandle ) {
+ if ( this.onbeforeunload === eventHandle ) {
+ this.onbeforeunload = null;
+ }
+ }
+ }
+ }
+};
+
+jQuery.removeEvent = document.removeEventListener ?
+ function( elem, type, handle ) {
+ if ( elem.removeEventListener ) {
+ elem.removeEventListener( type, handle, false );
+ }
+ } :
+ function( elem, type, handle ) {
+ if ( elem.detachEvent ) {
+ elem.detachEvent( "on" + type, handle );
+ }
+ };
+
+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;
+
+ // Events bubbling up the document may have been marked as prevented
+ // by a handler lower down the tree; reflect the correct value.
+ this.isDefaultPrevented = (src.defaultPrevented || src.returnValue === false ||
+ src.getPreventDefault && src.getPreventDefault()) ? returnTrue : returnFalse;
+
+ // Event type
+ } else {
+ this.type = src;
+ }
+
+ // timeStamp is buggy for some events on Firefox(#3843)
+ // So we won't rely on the native value
+ this.timeStamp = jQuery.now();
+
+ // Mark it as fixed
+ this[ jQuery.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)
+ } else {
+ 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;
+
+ // Firefox sometimes assigns relatedTarget a XUL element
+ // which we cannot access the parentNode property of
+ try {
+ // Traverse up the tree
+ while ( parent && parent !== this ) {
+ parent = parent.parentNode;
+ }