控制菜单显示内容

<table><tr><td id="Menu1" onclick="javascript:ShowMenuList(this);" >栏目1</td><td id="Menu2" onclick="javascript:ShowMenuList(this);">栏目2</td><td id="Menu3" onclick="javascript:ShowMenuList(this);">栏目3</td></tr>
<tr>
<td colspan="3">
<div id="List_Menu1" style="display:;">内容1</div>
<div id="List_Menu2" style="display:none;">内容2</div>
<div id="List_Menu3" style="display:none;">内容3</div>
</td>
</tr>
</table>

 

 

            <script language="javascript" type="text/javascript">
var tdnn;
tdnn = 1;

function ShowMenuList(e) {

  List_Menu1.style.display = "none";
  List_Menu2.style.display = "none";
  List_Menu3.style.display = "none";
  eval("List_" + e.id).style.display = "";
}

</script>