原生Javascript跨浏览器的事件对象

var EventUtil = {
    // 添加事件
    addHandler: function (ele, type, handler) {
        if (ele.addEventListener) {
            ele.addEventListener(type,handler,false);
        }
        else if (ele.attachEvent) {
            ele.attachEvent('on' + type, handler);
        }
        else {
            ele['on' + type] = handler;
        }
    },
    // 移除事件
    removeHandler: function (ele, type, handler) {
        if (ele.removeEventListener) {
            ele.removeEventListener(type,handler,false);
        }
        else if (ele.detachEvent) {
            ele.detachEvent('on' + type, handler);
        }
        else {
            ele['on' + type] = null;
        }
    },
    getEvent: function (event) {
        return event ? event : window.event;
    },
    // 获取事件目标
    getTarget: function (event) {
        return event.target || event.srcElement;
    },
    // 取消事件默认行为
    preventDefault: function (event) {
        if (event.preventDefault) {
            event.preventDefault();
        }
        else {
            event.returnValue = false;
        }
    },
    // 阻止事件冒泡
    stopPropagation: function (event) {
        if (event.stopPropagation) {
            event.stopPropagation();
        }
        else {
            event.cancelBubble = true;
        }
    }
};

调用：

var btn = document.getElementById('myBtn');
var handler = function (event) {
    event = EventUtil.getEvent(event);
    var target = EventUtil.getTarget(event);
    console.log(target)
}
EventUtil.addHandler(btn, click, handler);
EventUtil.removeHandler(btn, click, handler);

var link = document.getElementById('myLink');
link.onclick = function (event) {
    event = EventUtil.getEvent(event);
    EventUtil.preventDefault(event);
}