javascript怎么隐藏li

<div class="favorite_list">
    <div class="list_type" id="list_type">
      <ul class="all">
       <li> <a href="javascript:void(0);" onclick="showli(1);">全部(<span class="nums">{$count}</span>)</a></li>
       <li> <a href="javascript:void(0);" onclick="showli(60);">钢琴谱(<span class="nums">{$count_pu}</span>)</a></li>
       <li> <a href="javascript:void(0);" onclick="showli(525);">钢琴曲(<span class="nums">{$count_qu}</span>)</a></li>
       <li> <a href="javascript:void(0);" onclick="showli(531);">钢琴专辑(<span class="nums">{$count_zhuanji}</span>)</a></li>
       <li> <a href="javascript:void(0);" onclick="showli(541);">钢琴全集(<span class="nums">{$count_quanji}</span>)</a></li>
       <li> <a href="javascript:void(0);" onclick="showli(14);">钢琴视频(<span class="nums">{$count_shipin}</span>)</a></li>
      </ul>
    </div>
 
    <div class="list_content">
      <ul class="navigation" id="navigation">
        {loop $info $r}
        <li id="t1" class="sl{$r[parentid]}">
 
 
         <!-- 此处的class复制了一个变量，该变量的值可能是[60,525,531,542,14]-->
 
 
         <a href="{$r[url]}" target="blank"><h3>{$r[title]}</h3></a>
         <span class="date">{date("Y-m-d",$r[adddate])}</span>
         <a class="delete" href="javascript:void(0)" onclick="ConfirmDel({$r[id]});"><img src="http://www.hqgq.com/statics/www_images/favorite/delete.jpg"/></a>
         </li>
        {/loop}
      </ul>
    </div>
  </div>

function showli(pid){
  var arrnav = ["1", "525", "531","541","60","14"];
  if(pid=='1'){ // 如果是1就显示全部的li标签
    $("ul.navigation li").show();
    return false;
  }
 
  // 否则就显示对应的class="s1"+pid的li标签
 
 
  $.each(arrnav, function(i, item){
    if(item==pid){
      $("ul.navigation li.sl"+pid).show();
    }else{
      $("ul.navigation li.sl"+item).hide();
    }
　　});
}