CSS3 案例 - W3xue在线HTML/CSS/JS运行工具

​x
 
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html>
<head>
<style type="text/css">
body {counter-reset:section;}
h1 {counter-reset:subsection;}
h1:before
{
counter-increment:section;
content:"Section " counter(section) ". ";
}
h2:before 
{
counter-increment:subsection;
content:counter(section) "." counter(subsection) " ";
}
</style>
</head>
​
<body>
​
<p><b>注释：</b>如果已规定 !DOCTYPE，那么 Internet Explorer 8 （以及更高版本）支持 counter-increment 属性。</p>
​
<h1>HTML tutorials</h1>