preventDefault: function(){ if (this.event.preventDefault) this.event.preventDefault(); else this.event.returnValue = false; return this; } 
event.preventDefault = function() { this.returnValue = false; }; 
	preventDefault: function(){		if (this.event.preventDefault) this.event.preventDefault();		else this.event.returnValue = false;		return this;	}
9494	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/9494/af33b9b4b200ec7a74d5cc817c40b151988c7d6d/Event.js/buggy/Native/Event.js