利用div实现遮罩层效果

时间：2023-12-15 14:19:14

利用div实现遮罩层效果就是利用一个全屏、半透明的div遮住页面上其它元素，典型的例子就是百度的登录界面。下面贴出示例代码：

<!DOCTYPE html>

<html>

<head>

<meta charset="utf-8">

<title>全屏div</title>

<style>

html,body {

    margin:0;

    height:100%;

}

#test {

    width:100%;

    height:100%;

    background-color:#000;

    position:absolute;

    top:0;

    left:0;

    z-index:2;

    opacity:0.3;

    /*兼容IE8及以下版本浏览器*/

    filter: alpha(opacity=30);

    display:none;

}

#log_window {

    width:200px;

    height:200px;

    background-color:#FF0;

    margin: auto;

    position: absolute;

    z-index:3;

    top: 0;

    bottom: 0;

    left: 0;

    right: 0;

    display:none;

}

</style>

<script>

function shield(){

    var s = document.getElementById("test");

    s.style.display = "block";

    var l = document.getElementById("log_window");

    l.style.display = "block";

}

function cancel_shield(){

    var s = document.getElementById("test");

    s.style.display = "none";

    var l = document.getElementById("log_window");

    l.style.display = "none";

}

</script>

</head>

<body>

<a href="javascript:shield()">打开遮罩</a>

<div id="test"></div>

<div id="log_window">

<a href="javascript:cancel_shield()">关闭</a>

</div>

</body>

</html>

相关文章