<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>弹出窗口后网页不可操作</title>
<script src="js/js"></script>
<script>
function show() //显示隐藏层和弹出层
{
var hideobj=document.getElementById("hidebg");
hidebg.style.display="block"; //显示隐藏层
//hidebg.style.height=document.body.clientHeight+"px"; //设置隐藏层的高度为当前页面高度
document.getElementById("hidebox").style.display="block"; //显示弹出层
}
function hide() //去除隐藏层和弹出层
{
document.getElementById("hidebg").style.display="none";
document.getElementById("hidebox").style.display="none";
}
</script>
<style>
#hidebg { position:absolute;left:0px;top:0px;
background-color:#000;
width:100%; /*宽度设置为100%，这样才能使隐藏背景层覆盖原页面*/
height: 100%;
filter:alpha(opacity=60); /*设置透明度为60%*/
opacity:0.5; /*非IE浏览器下设置透明度为50%*/
display:none;
z-Index:2;}
#hidebox { text-align: right;position:absolute;width:400px;height:300px;top:200px;left:30%;border-radius: 5px;background-color:#fff;display:none;z-Index:3;padding: 10px;}
#content { text-align: center;cursor:pointer;z-Index:1;}
</style>
</head>
<body>
<div id="hidebg"></div>
<div id="hidebox"><span onClick="hide();" style="cursor:pointer;">关闭</span></div>
<div id="content" onClick="show();">点击打开</div>
</body>
</html>
原文地址：https://www.cnblogs.com/xihuanjiuquqiqang/p/10213878.html