Use valign attribute of td tag.
..
<td valign="top">
</td>
EDIT:
Try this,
<table>
<tr>
<td><input type="text" /></td>
<td><iframe scrolling="no" height="21px"
frameborder="0" width="62px" marginheight="0" marginwidth="0"
src="http://maishudi.com/Server/SecCode.php">
</iframe>
</td>
</tr>
</table>
adatapost
2009-08-26 05:11:52