<html>
<body>
<p><b>Note:</b> The dialog tag is only supported in Chrome and Safari 6.</p>
<table border="1">
<tr>
<th>January <dialog open>This is an open dialog window</dialog></th>
<th>February</th>
<th>March</th>
</tr>
<tr>
<td>31</td>
<td>28</td>
<td>31</td>
</tr>
</table>
</body>
</html>