codice:
<!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">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Documento senza titolo</title>
<style type="text/css">
<!--
.bordo {
	border: 2px solid #00F;
}
-->
</style>
</head>

<body>
<table width="500" border="0" align="center" cellpadding="5" cellspacing="10">
  <tr>
    <td width="33%" class="bordo"></td>
    <td width="33%"></td>
    <td width="33%" class="bordo"></td>
  </tr>
  <tr>
    <td width="33%"></td>
    <td width="33%" class="bordo"></td>
    <td width="33%"></td>
  </tr>
  <tr>
    <td width="33%" class="bordo"></td>
    <td width="33%"></td>
    <td width="33%" class="bordo"></td>
  </tr>
</table>

</body>
</html>