Tryit Editor v1.7

Source Code:

Result:

<!DOCTYPE html>
<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>

Edit the code above and click "Submit Code" to see the result.

W3Schools.com - Try it yourself

Source Code:	Result:
<!DOCTYPE html> <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>
Edit the code above and click "Submit Code" to see the result.	W3Schools.com - Try it yourself