简单教程
提交运行
代码编辑器：
<!DOCTYPE html> <meta charset="utf-8"><link href="/static/next/css/tryit.css?v=2017082407" rel="stylesheet"/> <style> 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> <p><b>注意:</b> 仅当 !DOCTYPE已经定义 IE8支持 这个属性.</p> <h1>HTML tutorials</h1> <h2>HTML Tutorial</h2> <h2>XHTML Tutorial</h2> <h2>CSS Tutorial</h2> <h1>Scripting tutorials</h1> <h2>JavaScript</h2> <h2>VBScript</h2> <h1>XML tutorials</h1> <h2>XML</h2> <h2>XSL</h2> <footer>简单教程，简单编程<br/>Copyright © 简单教程 www.twle.cn</footer>
运行结果：