屏蔽鼠标右键单击出现的默认上下文菜单，提供自定义菜单

<div id="myDiv" >hhhhhhhhhhhhh</div>
<div id="myMenu" style="visibility: hidden;background-color:red;position: absolute">
    自定义菜单
</div>
<script src="EventUtil.js"></script>//此js文件见上文
<script>
//load事件
EventUtil.addHandler(window,"load",function (event) {
    var myDiv = document.getElementById('myDiv');
    EventUtil.addHandler(myDiv,"contextmenu",function (event) {
        var myMenu = document.getElementById('myMenu');
        console.log(event)
        event = EventUtil.getEvent(event);
        EventUtil.preventDefault(event);

        myMenu.style.visibility = 'visible';
        myMenu.style.left = event.clientX + 'px';
        myMenu.style.top = event.clientY + 'px';
    });
    EventUtil.addHandler(document,"click",function (event) {
        document.getElementById("myMenu").style.visibility = "hidden"
    })
});

//兼容跨浏览器的事件对象
var EventUtil = {
        addHandler: function (element,type,handler) {
            if(element.addEventListener){
                element.addEventListener(type,handler,false)
            }else if(element.attachEvent){
                element.attachEvent("on"+type,handler);
            }else{
                element["on"+type] = handler;
            }
        },
        getEvent: function (event) {
            return event ? event : window.event;
        },

        getTarget: function (event) {
            return event.target || event.srcElement;
        },

        preventDefault: function (event) {
            if(event.preventDefault){
                event.preventDefault();
            }else{
                event.returnValue = false;
            }
        },

        removeHandler: function (element,type,handler) {
            if(element.removeEventListener){
                element.removeEventListener(type,handler,false)
            }else if(element.detachEvent){
                element.detachEvent("on"+type,handler);
            }else{
                element["on"+type] = null;
            }
        },

        stopPropagation: function (event) {
            if(event.stopPropagation){
                event.stopPropagation();
            }else{
                event.cancelBubble = true;
            }
        },

        getCharCode: function (event) {
            if(typeof event.charCode == "number"){
                return event.charCode;
            }else{
                return event.keyCode;
            }
        }
    };

image