Dede实现文章列表隔行换背景色让显示内容有所区别

{dede:list pagesize='50'} 
<LI><a href="[field:arcurl /]" title="[field:title function='htmlspecialchars(@me)'/]" 
target=_blank>[field:title function="cn_substr(@me,48)"/]</a>[field:pubdate runphp='yes'] 
$a="<font color=red>".strftime('%m-%d',@me)."</font>"; 
$b=strftime('%m-%d',@me); 
$ntime = time(); 
$day3 = 3600 * 24; 
if(($ntime - @me) < $day3) @me = $a; 
else @me =$b; 
[/field:pubdate]
[field:global name=autoindex runphp="yes"] 
if(@me%5==0)@me="<hr />"; 
else @me=""; 
[/field:global] 
{/dede:list} 
<DIV></DIV></LI>