很簡單代碼如下：
<!DOCTYPE html>
<html>
<head>
<title>右鍵菜單</title>
<style type="text/css">
#right-menu{
position: absolute;
width: 200px;
height: auto;
border: 1px #ccc solid;
display: none;
padding:2px 0;
box-shadow: 5px 5px 5px #ccc;
}
.menu-item{
height: 25px;
margin:4px 0;
padding:0 10px;
cursor: pointer;
}
.menu-item:hover{
background-color: #ccc;
}
.menu-item-separator{
border-top:1px #ccc solid;
height: 1px;
}
</style>
</head>
<body>
<!-- 自定義右鍵菜單dom -->
<div id="right-menu">
<div class="menu-item">執行</div>
<div class="menu-item">啓動</div>
<div class="menu-item-separator"></div>
<div class="menu-item">刪除</div>
<div class="menu-item">導出</div>
</div>
<script type="text/javascript">
window.oncontextmenu = function(e){
e.preventDefault(); //阻止瀏覽器自帶的右鍵菜單顯示
var menu = document.getElementById("right-menu");
menu.style.display = "block"; //將自定義的“右鍵菜單”顯示出來
menu.style.left = e.clientX + "px"; //設置位置，跟隨鼠標
menu.style.top = e.clientY+"px";
}
window.onclick = function(e){ //點擊窗口，右鍵菜單隱藏
var menu = document.getElementById("right-menu");
menu.style.display = "none";
}
</script>
</body>
</html>