Do it like this -
<table id="customerIdtest">
<tbody>
<tr class="listrow">
<td></td>
<td></td>
<td class="toHide"></td>
</tr>
<tr class="listrow">
<td></td>
<td></td>
<td class="toHide"></td>
</tr>
</tbody>
</table>
and script as -
<script type="text/javascript">
$(document).ready(function(){
$('.listrow .toHide').hide();
});
</script>
Hope this will help :)
[Mark it as answer if it solves your problem]