Table classes

[riskofficer]

Hello.

I have got one question: how can I separate table rows from each other by colors, for example first row white, second grey, third white ans so on?

Thank you!

--------------- Added [DATE]1272303539[/DATE] at [TIME]1272303539[/TIME] ---------------

For example I've got custom template:

<tr>
<td class="blockrow"><a href="member.php?u={vb:raw formresult.userid}">{vb:raw formresult.username}</a></td>
<td class="blockrow alt">{vb:raw date} {vb:raw time}</td>
{vb:raw formfields}
</tr>

I need to color code rows, first white, second grey, third white, forth grey, and so on