关键代码：
代码如下:
$(function(){
$(".tabs li").eq(0).css("background","#499AFF");
$(".tabs div").eq(0).show();
$(".tabsulli").click(function(i){
$(this).css("background","#499AFF").siblings().css("background","#ffffff");
$(".tabs div").eq($("li").index(this)).show().siblings("div").hide();
return false;
})
})

演示（请“运行代码”后，刷新一次）：
!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" html xmlns="http://www.w3.org/1999/xhtml" head meta http-equiv="Content-Type" content="text/html; charset=gb2312" / titlejquery tab/title script language="javascript" type="text/javascript" src="http://jqueryjs.googlecode.com/files/jquery-1.3.2.min.js"/script script language="javascript" type="text/javascript" $(function(){ $(".tabs li").eq(0).css("background","#499AFF"); $(".tabs div").eq(0).show(); $(".tabsulli").click(function(i){ $(this).css("background","#499AFF").siblings().css("background","#ffffff"); $(".tabs div").eq($("li").index(this)).show().siblings("div").hide(); return false; }) }) /script style type="text/css" *{ padding:0; margin:0; } body{ margin-left:100px; margin-top:100px; } .tabs{ width:250px; height:300px; } .tabs ul{ width:250px; height:28px; } .tabs ul li{ float:left; width:50px; height:28px; color:white; line-height:28px; margin-right:10px; text-align:center; } .tabs ul li a:link,.tabs ul li a:visited{ color:black; } .tabs div{ border:1px solid #499AFF; display:none; } .tabs div a{ display:block; width:250px; text-decoration:none; margin-top:5px; padding-left:10px; } a:link,a:visited{ color:blue; font-size:12px; text-decoration:none; } a:hover{ color:red; } li{ list-style:none; } /style /head body div class="tabs" ul lia href="#" target="_blank"/a/li lia href="#" target="_blank"脚本jb51/a/li /ul div a href="http://www.poluoluo.com/" target="_blank"/a a href="http://www.poluoluo.com/" target="_blank"/a a href="http://www.poluoluo.com/" target="_blank"/a a href="http://www.poluoluo.com/" target="_blank"/a a href="http://www.poluoluo.com/" target="_blank"/a a href="http://www.poluoluo.com/" target="_blank"/a a href="http://www.poluoluo.com/" target="_blank"/a a href="http://www.poluoluo.com/" target="_blank"/a /div div a href="http://www.poluoluo.com/" target="_blank"脚本poluoluo.com脚本poluoluo.com脚本poluoluo.com脚本poluoluo.com/a a href="http://www.poluoluo.com/" target="_blank"脚本poluoluo.com脚本poluoluo.com脚本poluoluo.com脚本poluoluo.com/a a href="http://www.poluoluo.com/" target="_blank"脚本poluoluo.com脚本poluoluo.com脚本poluoluo.com脚本poluoluo.com/a a href="http://www.poluoluo.com/" target="_blank"脚本poluoluo.com脚本poluoluo.com脚本poluoluo.com脚本poluoluo.com/a a href="http://www.poluoluo.com/" target="_blank"脚本poluoluo.com脚本poluoluo.com脚本poluoluo.com脚本poluoluo.com/a a href="http://www.poluoluo.com/" target="_blank"脚本poluoluo.com脚本poluoluo.com脚本poluoluo.com脚本poluoluo.com/a a href="http://www.poluoluo.com/" target="_blank"脚本poluoluo.com脚本poluoluo.com脚本poluoluo.com脚本poluoluo.com/a a href="http://www.poluoluo.com/" target="_blank"脚本poluoluo.com脚本poluoluo.com脚本poluoluo.com脚本poluoluo.com/a /div /div /body /html
    [Ctrl+A 全选 注:如需引入外部Js需刷新才能执行]