ShowHide

<script language="javascript">
function showHide(id){
if (document.getElementById('Layer'+id).style.display=="block")
   {document.getElementById('Layer'+id).style.display="none";}
else
   {document.getElementById('Layer'+id).style.display="block";}
   return true;
}
</script>

<a href="javascript:void(1)" onclick="showHide(1)">查看</a>
<div id="Layer1" style="display:none">
<a href="javascript:void(1)" onclick="showHide(1)">隐藏</a>
</div>

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function menuShow(id)
{
 for(i=1;i<=5;i++){  
     document.getElementById("cata"+i).className="cata_l";
     document.getElementById("cata_lst"+i).style.display="none";
      }
  document.getElementById("cata"+id).className="cata_a";
  document.getElementById("cata_lst"+id).style.display="block";  
}

<div class="cata_l" id="cata1" onclick="amenuShow(5)">我的相册</div>
  <div id="cata_lst1"  style="display:none">
 </div>