also über css kannst du es so verwirklichen,
<style>
.count tr:nth-child(odd) { background: #f00; }
.count tr:nth-child(even) { background: #0f0; }
</style>
<table class="count">
<tbody>
<tr>
<td>Hans</td>
<td>Meyer</td>
</tr>
<tr>
<td>Patrick</td>
<td>Hans</td>
</tr>
<tr>
<td>Patrick</td>
<td>Hans</td>
</tr>
<tr>
<td>Patrick</td>
<td>Hans</td>
</tr>
</tbody>