js原生 跨平台添加删除事件

javascript知识点

//
var eventUtil = {
    addHandler: function (element, type, handler) {
        if (element.addEventListener) {
            element.addEventListener(type, handle, false);//DOM2 not ie
        } else if (element.attachEvent) {
            element.attachEvent("on" + type, handler);//DOM2 ie
        } else {
            element["on" + type] = handler;//DOM0
        }
    },
    removeHandler: function (element, type, handler) {
        if (element.removeEventListener) {
            element.removeEventListener(type, handle, false);
        } else if (element.detachEvent) {
            element.detachEvent("on" + type, handler);
        } else {
            element["on" + type] = null;
        }
    }
};

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