如何用帝国标签实现当前栏目高亮

//取得顶级栏目ID函数 
function user_GetTopBclassid($classid){ 
global $class_r; 
$fr=explode('|',$class_r[$classid][featherclass]); 
$topbclassid=$fr[1]?$fr[1]:$classid;//取得第一级栏目id 
return $topbclassid; 
}

<ul class="menu"> 
<li id="current"><a href="/">首页</a></li> 
<!--灵动标签开始--> 
[e:loop={'select classid,classname,classpath,bclassid,bname from [!db.pre!]enewsclass where bclassid=0 order by classid',0,24,0}] 
<li id="current<?=$bqr[classid]?>"><a href="<?=$public_r[newsurl]?><?=$bqr[classpath]?>" title="<?=$bqr[bname]?>" target="_self" ><?=$bqr[classname]?></a></li> 
[/e:loop] 
<style type="text/css"><!--加入动态css样式--> 
<!-- 
#menu #current<?=user_GetTopBclassid($GLOBALS[navclassid])?> /*---动态获取当前栏目id -*/ 
{background:url(/images/2008a/bg_menu_on_left.gif) no-repeat; font-weight:bold;} 
#menu #current<?=user_GetTopBclassid($GLOBALS[navclassid])?> a,#menu #current<?=user_GetTopBclassid($GLOBALS[navclassid])?> a:hover{color:#000; background:url(/images/2008a/bg_menu_on_right.gif) no-repeat right;} 
--> 
</style> 
<!--灵动标签结束-->