css3点击鼠标右键弹出菜单栏js特效

js代码

<script type="text/javascript">
    document.oncontextmenu=function(ev){
        ev=ev||event;
        var x = ev.clientX;
        var y = ev.clientY;

        var menu = document.querySelector("#menu");
        menu.style.display="block";
        menu.style.left = x+"px";
        menu.style.top = y+"px";

        ev.preventDefault();
    };

    document.onclick=function(){
        var menu = document.querySelector("#menu");
        menu.style.display="none";
    }
</script>