效果如图:
我们可以在这个基础上做相应的修改，比如白框上做登录之类的
代码如下，直接新建为html可用:
<html>
<head>
<title></title>
<meta http-equiv="content-Type" content="text/html;charset=gb2312">
<!-- 把下面代码加到<head>与</head>之间-->
<style type="text/css">
.black_overlay {
display: none;
position: absolute;
top: 0%;
left: 0%;
width: 100%;
height: 100%;
background-color: black;
z-index: 1001;
-moz-opacity: 0.8;
opacity: .80;
filter: alpha(opacity = 80);
}
.white_content {
display: none;
position: absolute;
top: 25%;
left: 25%;
width: 50%;
height: 50%;
padding: 16px;
/**
border: 16px solid orange;
**/
background-color: white;
z-index: 1002;
overflow: auto;
}
</style>
</head>
<body>
<!--把下面代码加到<body> 与</body>之间-->
<input type="radio" οnclick="document.getElementById('light').style.display='block'; document.getElementById('fade').style.display='block'">
<div id="light" class="white_content">
<input type="button" value="关闭" οnclick="document.getElementById('light').style.display='none';document.getElementById('fade').style.display='none'"></a>
</div>
<div id="fade" class="black_overlay">
</div>
</body>
</html>
