CSS question

This works for me...

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
        "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">
<head>
	<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
	<meta http-equiv="Content-Language" content="en-uk" />
	<title></title>
	<style type="text/css">
    <!--
    table {
		border: none;
		margin: 0;
		padding: 0;
		border-collapse: collapse;
	}
	table tr {
		margin: 0;
		padding: 0;
	}
	table tr td {
		margin: 0;
		padding: 0;
		background-color: #ff0000;
	}
    -->
    </style>
</head>

<body>
<table>
<tr>
	<td>test</td>
	<td>test</td>
</tr>
<tr>
	<td>test</td>
	<td>test</td>
</tr>
</table>


</body>
</html>