[jQuery] paint columns in alternating colour

[kevind]

i have this table structure - a database feeds rows into it with
Class=Row or AltRow
I want to paint the columns in alternating colours for both Row and
AltRow for readability

I tried:
$(document).ready(function(){
$(".Grid>.Row>td:even").css("background","silver");
});

and other variations - i'm having difficulty selecting the TD's in the
TR of Class 'Row' which is in the table of class 'Grid' - at one point
i got a checkerboard effect  :)   I can give the table an ID if that's
better to pick things out

Any help appreciated
=============================================================

 <table class="Grid" cellspacing="0" cellpadding="0">
        <caption class="Row">Total Records:&nbsp;5&nbsp;</caption>
         <tr class="Caption">
          <th></th>
          <th></th>
          <th></th>
          <th></th>
          <th></th>
          <th>Manager</th>
          <th>Status</th>
         </tr>
         <tr class="GroupCaption">
          <th style="TEXT-ALIGN: right">&nbsp; </th>
           <th style="TEXT-ALIGN: right">&nbsp; </th>
           <th style="TEXT-ALIGN: right">&nbsp; </th>
           <th style="TEXT-ALIGN: right">&nbsp; </th>
           <th style="TEXT-ALIGN: right">&nbsp; </th>
           <th style="TEXT-ALIGN: right">&nbsp; </th>
           <th style="TEXT-ALIGN: right">&nbsp; </th>
         </tr>
         <tr class="Row">
          <td style="TEXT-ALIGN: right">&nbsp; </td>
          <td style="TEXT-ALIGN: right">150 </td>
          <td>ExamOne Hamilton </td>
          <td>printer </td>
          <td>&nbsp; </td>
          <td>Laura Felker </td>
          <td>Un-Assigned </td>
        </tr>
         <tr class="Row">
          <td style="TEXT-ALIGN: right">&nbsp; </td>
          <td style="TEXT-ALIGN: right">150 </td>
          <td>&nbsp;  </td>
          <td>monitors </td>
          <td>&nbsp; </td>
          <td>&nbsp;  </td>
          <td>Un-Assigned </td>
        </tr>
  <tr class="Footer">
          <td colspan="7">
        <!-- ..nav buttons appear here -->
 </tr>
</table>