自定义右键菜单

 1     window.oncontextmenu = function(ev) {
 2         var ul = document.getElementById("ul1");
 3         var oEvent = ev || event;
 4         
 5         ul.style.left = oEvent.clientX + "px";
 6         ul.style.top = oEvent.clientY + "px";
 7         ul.style.display = "block";
 8 
 9         return false;
10     };
11 
12     //点击其他地方隐藏右键菜单
13     document.onclick = function() {
14         var ul = document.getElementById("ul1");
15         ul.style.display = "none";
16     };