ช่วยดูหน่อยครับคือว่ามันลิ้งไม่ไปน่ะครับ.............................................

<table  border=0 cellSpacing=2 cellPadding=2 width="100%">
          <tr>
            <td class=VertMenuItems><a href="?nav=product-type"><img src="images/tree_subdir_plus.gif" width="9" height="9" /> ประเภทสินค้า</a></td>
          </tr>
          <tr>
            <td class=VertMenuItems><a href="?nav=product-details"><img src="images/tree_subdir_plus.gif" width="9" height="9" /> รายละเอียดสินค้า</a></td>
          </tr>
          <tr>
            <td class=VertMenuItems><a href="?nav=forum"><img src="images/tree_subdir_plus.gif" width="9" height="9" /> จัดการกระทู้</a></td>
          </tr>
                    <tr>
            <td class=VertMenuItems><a href="?nav=news"><img src="images/tree_subdir_plus.gif" width="9" height="9" /> ประกาศข่าว</a></td>
          </tr>
                    <tr>
            <td class=VertMenuItems><a href="?nav=ads"><img src="images/tree_subdir_plus.gif" width="9" height="9" /> โฆษณา</a></td>
          </tr>
                    <tr>
            <td class=VertMenuItems><a href="?nav=user"><img src="images/tree_subdir_plus.gif" width="9" height="9" /> บัญชีผู้ใช้</a></td>
          </tr>
          <tr>
            <td class=VertMenuItems><a href="?nav=edit-profile"><img src="images/tree_subdir_plus.gif" width="9" height="9" /> แก้ไขข้อมูลส่วนตัว</a></td>
          </tr>
          <tr>
            <td class=VertMenuItems><a href="?nav=logout"><img src="images/tree_subdir_plus.gif" width="9" height="9" /> <strong>ออกจากระบบ</strong></a></td>
          </tr>
        </table>
  <? 
    if($nav=="product-type"){
		require("insertType.php");
	}else if($nav=="product-details"){
		require("insertSpeck.php");
	}else if($nav=="edit-profile"){
		require("editProfile.php");//EditAdminProfile
	}else if($nav=="forum"){
		require("mainwebboardAdmin.php");
	}else if($nav=="news"){
		require("editAdminNews.php");
	}else if($nav=="user"){
		require("editUser.php");
	}else if($nav=="ads"){
		require("editUserPromotion.php");
	}else if($nav=="logout"){
		require("logout.php");
	}
	
	?>
  </div>
</div>
  <? include("../footer.php");?>
</body>
</html>