javascript兼容添加与删除事件监听

// 通用的添加和删除事件的方法

function AddEventHandler(oTarget, sEventType, fnHandler) {
    if (oTarget.addEventListener) {//非IE
        oTarget.addEventListener(sEventType, fnHandler, false);
    } else if (oTarget.attachEvent) {//IE
        oTarget.attachEvent('on' + sEventType, fnHandler);
    } else {
        oTarget['on' + sEventType] = fnHandler;
    }

}

function RemoveEventHandler(oTarget, sEventType, fnHandler) {
    if (oTarget.removeEventListener) {//非IE
        oTarget.removeEventListener(sEventType, fnHandler, false);
    } else if (oTarget.detachEvent) {//IE
        oTarget.detachEvent('on' + sEventType, fnHandler);
    } else {
        oTarget['on' + sEventType] = null;
    }

}