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; 
	} 
}