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代码编辑器：

<!DOCTYPE html>
<meta charset="utf-8">
<link href="/static/next/css/tryit.css?v=2017082407" rel="stylesheet"/>   
<style>
#navlist{position:relative;height: 44px;}
#navlist li{margin:0;padding:0;list-style:none;position:absolute;top:0;}
#navlist li, #navlist a{height:44px;display:block;}
#home{left:0px;width:46px;}
#home{background:url('/static/i/css/img_navsprites_hover.gif') 0 0;}
#home a:hover{background: url('/static/i/css/img_navsprites_hover.gif') 0 -45px;}
#prev{left:63px;width:43px;}
#prev{background:url('/static/i/css/img_navsprites_hover.gif') -47px 0;}
#prev a:hover{background: url('/static/i/css/img_navsprites_hover.gif') -47px -45px;}
#next{left:129px;width:43px;}
#next{background:url('/static/i/css/img_navsprites_hover.gif') -91px 0;}
#next a:hover{background: url('/static/i/css/img_navsprites_hover.gif') -91px -45px;}
</style>
<ul id="navlist">
  <li id="home"><a href="default.asp"></a></li>
  <li id="prev"><a href="css_intro.asp"></a></li>
  <li id="next"><a href="css_syntax.asp"></a></li>
</ul>
<footer>简单教程，简单编程<br/>Copyright © 简单教程 www.twle.cn</footer>

代码编辑器：

运行结果：