Hi Please help me to define a sub for td of Datalist in VB.Net

Here is my Design Code:

Code:
<asp:DataList ID="subMenu" runat="server">
  <ItemTemplate>
    <table border="0" runat="server" cellpadding="0" cellspacing="0" width="170px">
      <tr runat="server">
        <td runat="server"
...