Since you have the TD available on server, by setting
runat="server"
and do not want to use Javascript, on the
Page_Load
event access the td by its ID and set it
visible = false
i.e.,
tdDOR.visible = false
or
You can set its style as well in HTML itself
<td align="right" id="tdDOR" runat="server" style="display:none">
DOR
</td>
or
You can set this style in code behind as well on Page_Load event
tdDOR.attributes.add("style","display:none")
Or
You can use another style,
tdDOR.attributes.add("style","visibility:hidden")