CSS仿淘寶首頁導航條布局效果

css|淘寶      以下是CSS內容部分：

以下是引用片段：
<style> 
/* www.zishu.cn 子鼠*/ 
body{ font-size:12px; text-align:center;  margin-top:30px; font-family:Verdana;} 
div,img{margin:0; padding:0; border:0;} 
ul,li{list-style-type: none; margin:0; padding:0; float:left; } 
#info{ margin-left:auto; margin-right:auto;width:760px; text-align:left;} 
#new{ margin-top:-12px;position: absolute;margin-left:-12px;} 
#nav{ height:30px; width:610px; margin-left:auto; margin-right:auto;} 
#nav li{margin-left:1px; height:30px;} 
#nav li a{ display:block;float:left; text-decoration:none; background-image: url(/UploadPic/2007-4/200741141917889.gif);background-repeat: no-repeat; display:block; background-position:left top;} 
#nav a span{cursor:hand; color:#000;background-image: url(/UploadPic/2007-4/200741141927920.gif);background-repeat: no-repeat; display:block;background-position: right top; padding:7px 10px 6px 10px; float:left; } 
#nav li a:active,#nav li a:hover {margin-top:0px; } 
#nav li  a:active span,#nav li a:hover span {padding:10px 10px 6px 10px; margin-top:0px; display:block; color:#FFF;} 
#zishu01 a:link,#zishu01 a:visited {background-position: 0px -27px;} 
#zishu01 a:link span,#zishu01 a:visited span{background-position:right -27px;padding:10px 10px 6px 10px; margin-top:0; color:#FFF; font-weight:bold;} 
#zishu02 a,#zishu03 a,#zishu04 a,#zishu05 a,#zishu06 a,#zishu07 a,#zishu08 a,#zishu09 a,#zishu10 a,#zishu11 a{margin-top:3px;} 
#zishu02 a:active,#zishu02 a:hover {background-position: 0px -57px;} 
#zishu02 a:active span,#zishu02 a:hover span{background-position:right -57px;} 
#zishu03 a:active,#zishu03 a:hover {background-position: 0px -87px;} 
#zishu03 a:active span,#zishu03 a:hover span{background-position:right -87px;} 
#zishu04 a:active,#zishu04 a:hover {background-position: 0px -117px;} 
#zishu04 a:active span,#zishu04 a:hover span{background-position:right -117px;} 
#zishu05 a:active,#zishu05 a:hover {background-position: 0px -147px;} 
#zishu05 a:active span,#zishu05 a:hover span{background-position:right -147px;} 
#zishu06 a:active,#zishu06 a:hover {background-position: 0px -177px;} 
#zishu06 a:active span,#zishu06 a:hover span{background-position:right -177px;} 
#zishu07 a:active,#zishu07 a:hover {background-position: 0px -207px;} 
#zishu07 a:active span,#zishu07 a:hover span{background-position:right -207px;} 
#zishu08 a:active,#zishu08 a:hover {background-position: 0px -237px;} 
#zishu08 a:active span,#zishu08 a:hover span{background-position:right -237px;} 
#zishu09 a:active,#zishu09 a:hover {background-position: 0px -267px;} 
#zishu09 a:active span,#zishu09 a:hover span{background-position:right -267px;} 
#zishu10 a:active,#zishu10 a:hover {background-position: 0px -297px;} 
#zishu10 a:active span,#zishu10 a:hover span{background-position:right -297px;} 
#zishu11 a:link span,#zishu11 a:visited span{color:#FF6600;} 
#zishu11 a:active,#zishu11 a:hover {background-position: 0px -327px;} 
#zishu11 a:active span,#zishu11 a:hover span{background-position:right -327px;} 
#menu{ width:760px; height:26px; background:#FF9900;} 
#r1{border-top: 0px;border-bottom: 0px; border-left:3px solid #fff;border-right:3px solid #fff; height:1px; overflow:hidden;} 
#r2{border-top: 0px;border-bottom: 0px; border-left:2px solid #fff;border-right:2px solid #fff; height:1px; overflow:hidden;} 
#r3{border-top: 0px;border-bottom: 0px;    border-left:1px solid #fff;border-right:1px solid #fff; height:1px; overflow:hidden;} 
</style>

     以下是內容部分：

以下是引用片段：
<div id="info"> 
    <div id="nav"> 
        <ul> 
            <li id="zishu01"><a href="http://www.zishu.cn"><span>首頁</span></a></li> 
            <li id="zishu02"><a href="http://www.zishu.cn"><span>數位通訊</span></a></li> 
            <li id="zishu03"><a href="http://www.zishu.cn"><span>女人</span></a></li> 
            <li id="zishu04"><a href="http://www.zishu.cn"><span>男人</span></a></li> 
            <li id="zishu05"><a href="http://www.zishu.cn"><span>家居</span></a></li> 
            <li id="zishu06"><a href="http://www.zishu.cn"><span>書籍音像</span></a></li> 
            <li id="zishu07"><a href="http://www.zishu.cn"><span>運動</span></a></li> 
            <li id="zishu08"><a href="http://www.zishu.cn"><span>遊戲</span></a></li> 
            <li id="zishu09"><a href="http://www.zishu.cn"><span>寵物</span></a></li> 
            <li id="zishu10"><a href="http://www.zishu.cn"><span>香港街</span></a></li> 
            <li id="zishu11"><a href="http://www.zishu.cn"><span>淘寶商城</span></a></li> 
            <li><div id="new"><img src="/UploadPic/2007-4/200741141927609.gif" alt="新加欄目" /></div></li> 
        </ul> 
    </div>     
    <div id="menu"> 
        <div id="r1"></div> 
        <div id="r2"></div> 
        <div id="r3"></div> 
        <div></div> 
    </div> 
</div> 
<p>仿淘寶網首頁導航條效果 轉載請註明出處 子鼠 www.zishu.cn 2006-05-21 淩晨03:05分</p>

查看效果：
<!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=utf-8" /><title>TAO BAO TEST 2</title><style>/* www.zishu.cn 子鼠*/body{ font-size:12px; text-align:center;  margin-top:30px; font-family:Verdana;}div,img{margin:0; padding:0; border:0;}ul,li{list-style-type: none; margin:0; padding:0; float:left; }#info{ margin-left:auto; margin-right:auto;width:760px; text-align:left;}#new{ margin-top:-12px;position: absolute;margin-left:-12px;}#nav{ height:30px; width:610px; margin-left:auto; margin-right:auto;}#nav li{margin-left:1px; height:30px;}#nav li a{ display:block;float:left; text-decoration:none; background-image: url(/UploadPic/2007-4/200741141917889.gif);background-repeat: no-repeat; display:block; background-position:left top;}#nav a span{cursor:hand; color:#000;background-image: url(/UploadPic/2007-4/200741141927920.gif);background-repeat: no-repeat; display:block;background-position: right top; padding:7px 10px 6px 10px; float:left; }#nav li a:active,#nav li a:hover {margin-top:0px; }#nav li  a:active span,#nav li a:hover span {padding:10px 10px 6px 10px; margin-top:0px; display:block; color:#FFF;}#zishu01 a:link,#zishu01 a:visited {background-position: 0px -27px;}#zishu01 a:link span,#zishu01 a:visited span{background-position:right -27px;padding:10px 10px 6px 10px; margin-top:0; color:#FFF; font-weight:bold;}#zishu02 a,#zishu03 a,#zishu04 a,#zishu05 a,#zishu06 a,#zishu07 a,#zishu08 a,#zishu09 a,#zishu10 a,#zishu11 a{margin-top:3px;}#zishu02 a:active,#zishu02 a:hover {background-position: 0px -57px;}#zishu02 a:active span,#zishu02 a:hover span{background-position:right -57px;}#zishu03 a:active,#zishu03 a:hover {background-position: 0px -87px;}#zishu03 a:active span,#zishu03 a:hover span{background-position:right -87px;}#zishu04 a:active,#zishu04 a:hover {background-position: 0px -117px;}#zishu04 a:active span,#zishu04 a:hover span{background-position:right -117px;}#zishu05 a:active,#zishu05 a:hover {background-position: 0px -147px;}#zishu05 a:active span,#zishu05 a:hover span{background-position:right -147px;}#zishu06 a:active,#zishu06 a:hover {background-position: 0px -177px;}#zishu06 a:active span,#zishu06 a:hover span{background-position:right -177px;}#zishu07 a:active,#zishu07 a:hover {background-position: 0px -207px;}#zishu07 a:active span,#zishu07 a:hover span{background-position:right -207px;}#zishu08 a:active,#zishu08 a:hover {background-position: 0px -237px;}#zishu08 a:active span,#zishu08 a:hover span{background-position:right -237px;}#zishu09 a:active,#zishu09 a:hover {background-position: 0px -267px;}#zishu09 a:active span,#zishu09 a:hover span{background-position:right -267px;}#zishu10 a:active,#zishu10 a:hover {background-position: 0px -297px;}#zishu10 a:active span,#zishu10 a:hover span{background-position:right -297px;}#zishu11 a:link span,#zishu11 a:visited span{color:#FF6600;}#zishu11 a:active,#zishu11 a:hover {background-position: 0px -327px;}#zishu11 a:active span,#zishu11 a:hover span{background-position:right -327px;}#menu{ width:760px; height:26px; background:#FF9900;}#r1{border-top: 0px;border-bottom: 0px; border-left:3px solid #fff;border-right:3px solid #fff; height:1px; overflow:hidden;}#r2{border-top: 0px;border-bottom: 0px; border-left:2px solid #fff;border-right:2px solid #fff; height:1px; overflow:hidden;}#r3{border-top: 0px;border-bottom: 0px; border-left:1px solid #fff;border-right:1px solid #fff; height:1px; overflow:hidden;}</style></head><body><div id="info"> <div id="nav">  <ul>   <li id="zishu01"><a href="http://www.zishu.cn"><span>首頁</span></a></li>   <li id="zishu02"><a href="http://www.zishu.cn"><span>數位通訊</span></a></li>   <li id="zishu03"><a href="http://www.zishu.cn"><span>女人</span></a></li>   <li id="zishu04"><a href="http://www.zishu.cn"><span>男人</span></a></li>   <li id="zishu05"><a href="http://www.zishu.cn"><span>家居</span></a></li>   <li id="zishu06"><a href="http://www.zishu.cn"><span>書籍音像</span></a></li>   <li id="zishu07"><a href="http://www.zishu.cn"><span>運動</span></a></li>   <li id="zishu08"><a href="http://www.zishu.cn"><span>遊戲</span></a></li>   <li id="zishu09"><a href="http://www.zishu.cn"><span>寵物</span></a></li>   <li id="zishu10"><a href="http://www.zishu.cn"><span>香港街</span></a></li>   <li id="zishu11"><a href="http://www.zishu.cn"><span>淘寶商城</span></a></li>   <li><div id="new"><img src="/UploadPic/2007-4/200741141927609.gif" alt="新加欄目" /></div></li>  </ul> </div>  <div id="menu">  <div id="r1"></div>  <div id="r2"></div>  <div id="r3"></div>  <div></div> </div></div><p>仿淘寶網首頁導航條效果 轉載請註明出處 子鼠 www.zishu.cn 2006-05-21 淩晨03:05分</p></body></html><script language="Javascript"> var now = new Date(); 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