/**
 * @author silent
 */
var eventUtil = new Object();

eventUtil.addEventHandler = function(oTarget, sEventType, fnHandler){
	if(oTarget.addEventListener){
		oTarget.addEventListener(sEventType, fnHandler, false);
	}else if (oTarget.attachEvent){
		oTarget.attachEvent("on"+sEventType, fnHandler);
	}else{
		oTarget['on'+sEventType] = fnHandler;
	}
}

eventUtil.removeEventHandler = function(oTarget, sEventType, fnHandler){
	if(oTarget.removeEventListener){
		oTarget.removeEventListener(sEventType, fnHandler, false);
	}else if (oTarget.detachEvent){
		oTarget.detachEvent("on"+sEventType, fnHandler);
	}else{
		oTarget['on'+sEventType] = null;
	}
}