/**
 * addEvent
 */
function addEvent(obj, evType, fn){ 
 if (obj.addEventListener){ 
	 obj.addEventListener(evType, fn, false); 
	 return true; 
 } else if (obj.attachEvent){ 
	 var r = obj.attachEvent("on"+evType, fn); 
	 return r; 
 } else { 
	 return false; 
 } 
}