<table id="idTab" runat="server" class="table table-bordered table-striped">
  <thead>
  <tr>
  <td>Campo 1</td>
  <td>Campo 2</td>
  </tr>
  </thead>
  <tbody>
  </tbody>
  <tfoot>
  <tr>
  <td>Campo 1</td>
  <td>Campo 2</td>
  </tr>
  </tfoot>
</table>