javascript中级--事件--取消系统默认程序|建自己的右键菜单

一、取消系统右键

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <script>
        document.oncontextmenu = function() {
            alert('a');
            return false;
        }
    </script>
</head>

<body>

</body>

</html>

 二、自定义右键菜单

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
        * {
            margin: 0;
            padding: 0;
        }
        
        ul,
        li,
        ol {
            list-style: none;
            list-style-type: none;
        }
        
        #ul1 {
            width: 100px;
            padding: 2px;
            text-align: center;
            background: #ccc;
            position: absolute;
            display: none;
        }
        
        #ul1 li {
            padding: 2px;
        }
        
        #ul1 li a {
            display: block
        }
    </style>
    <script>
        document.oncontextmenu = function(ev) {
            var oEvent = ev || event;
            var oUl = document.getElementById('ul1');
            var scrollTop = document.documentElement.scrollTop || document.body.scrollTop;
            var scrollleft = document.documentElement.scrollLeft || document.body.scrollLeft;
            oUl.style.display = 'block';
            oUl.style.left = oEvent.clientX + scrollleft + 'px';
            oUl.style.top = oEvent.clientY + scrollTop + 'px';
            return false;
        }
        document.onclick = function() {
            var oUl = document.getElementById('ul1');
            oUl.style.display = 'none';

        }
    </script>
</head>

<body style="height:1000px">
    <ul id="ul1">
        <li><a href="http://www.baidu.com">登录</a></li>
        <li>回到首页</li>
        <li>联系我们</li>
    </ul>

</body>

</html>

 

posted @ 2017-03-07 13:46  Mr_W_Blog  阅读(202)  评论(0)    收藏  举报