I have found that when things pop to the top of the screen, it means I have lopsided tr/td tags. Example:
<table width="255" border="1" cellspacing="0" cellpadding="0" align="right">
<tr>
<td>A</td>
<td>B</td>
</tr>
<tr>
<td>1</td>
<td>2</td>
</tr>
</td></tr>
3 - This td should pop to the top of the screen
</table>
Probably has nothing to do with your script; but the placement of it.