<!DOCTYPE html>
<html>
<head>
<style type='text/css'>
#odd tr:nth-child(odd) {
background-color: blue;
}
#even tr:nth-child(even) {
background-color: red;
}
</style>
</head>
<body>
<table id="odd">
<tr>
<td>IE</td>
<td>test</td>
</tr>
<tr>
<td>Firefox</td>
<td>test</td>
</tr>
<tr>
<td>Chrome</td>
<td>test</td>
</tr>
<tr>
<td>Safari</td>
<td>test</td>
</tr>
<tr>
<td>Opera</td>
<td>test</td>
</tr>
</table>
<table id="even">
<tr>
<td>IE</td>
<td>test</td>
</tr>
<tr>
<td>Firefox</td>
<td>test</td>
</tr>
<tr>
<td>Chrome</td>
<td>test</td>
</tr>
<tr>
<td>Safari</td>
<td>test</td>
</tr>
<tr>
<td>Opera</td>
<td>test</td>
</tr>
</table>
</body>
</html>