<style type="text/css">
<!--
#top2 LI.self A {
    BACKGROUND: url(img/nav_bg_current.gif) no-repeat left -40px; COLOR: #fff
}
-->
</style>
<BODY onload='onloadcss()'>
<SCRIPT language=javascript>
var url=location.pathname;//获得url/后的值
var arrdir=url.split("/");//分割url得到数组
dirname=arrdir[1].toString();//取数组的第二个数
function cssstyle(objName,selfname){
    if(dirname=="" || dirname=="index.php"){//当前目录是首页时
        if (selfname=="index.php")
            document.getElementById(objName).className='self';
        else
            return("");
    }
    else//不是首页时
    {
        if (selfname=="")
            return("");
        else if(dirname==selfname)
            document.getElementById(objName).className='self'
    }
}
function onloadcss(){
cssstyle("p1","index.php");
cssstyle("p2","search.php");
cssstyle("p3","member.php");
cssstyle("p4","group.php")
cssstyle("p5","brand.php")
cssstyle("p6","cart.php")
cssstyle("p7","goods.php")
cssstyle("p8","page.php")
cssstyle("p9","bbs")
}
</SCRIPT>

  <LI class=mouseout id=p1><A title="首 页" 
  href="http://o.99081.com/tianshixiaoyi/index.php">Home首页</A> < /li>
  <LI class=mouseout id=p2><A title=商品搜索 
  href="http://o.99081.com/tianshixiaoyi/search.php?action=search">Search商品搜索</A> </li >
  <LI class=mouseout id=p3><A title=订单查询 
  href="http://o.99081.com/tianshixiaoyi/member.php?action=order">Order订单查询</A> </li >


这样写的不知道还少了什么  哪个 class=mouseout  变化的代码