网络上有很多js版本的lightbox效果介绍。不过都下载一个lightbox的js小则几十K，大则上百K。如果你只是需要一个类似Lightbox的效果，这种百分之百纯CSS制造，不含js的办法倒是可以试试。原理很简单，看看就应该明白了。
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>纯CSS Lightbox效果 www.vevb.com</title>
<style>
.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>
<p>This is the main content. To display a lightbox click <a href = "javascript:void(0)" onclick = "document.getElementById('light').style.display='block';document.getElementById('fade').style.display='block'">here</a></p>
<div id="light" class="white_content">This is the lightbox content. <a href = "Javascript:void(0)" onclick = "document.getElementById('light').style.display='none';document.getElementById('fade').style.display='none'">Close</a></div>
<div id="fade" class="black_overlay"></div>
</body>
</html>
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