Jquery Filter

<script type="text/javascript" src="scripts/jquery-1.2.1.js"></script>

<script type="text/javascript">

$(function(){

$("td").filter(function(){

return this.innerHTML.match(/^/d+$/);

}).css({"background-color":"blue"});

});

</script>

************************************************************************************

<table width="200" border="1" cellspacing="0" cellpadding="0">

  <tr>

    <th scope="col">&nbsp;</th>

    <th scope="col">&nbsp;</th>

    <th scope="col">45</th>

    <th scope="col">&nbsp;</th>

  </tr>

  <tr>

    <td>df</td>

    <td>df</td>

    <td>&nbsp;</td>

    <td>45</td>

  </tr>

  <tr>

    <td>&nbsp;</td>

    <td>45</td>

    <td>34</td>

    <td>45</td>

  </tr>

  <tr>

    <td>2</td>

    <td>45</td>

    <td>&nbsp;</td>

    <td>&nbsp;</td>

  </tr>

</table>