<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title>用jquery做遮罩</title>
<style>
.all{
width:100%;
height:500px;
background: red;
position: relative;
}
.mask {
width:100%;
height:500px;
position: absolute;
display: none;
background:rgba(0,0,0,.5);
z-index:1000;
}
</style>
</head>
<body>
<div class="all">
<div id="mask" class="mask"></div>
</div>
</body>
<script src="jquery-1.11.3.min.js"></script>
<script>
(function(){
$(function(){
$(".all").click(function () {
$("#mask").slideToggle(1000);
});
});
})()
</script>
</html>
jQuery的代码一点点，是不是简单啊！！！哈哈哈