ended up using this....
<tr>
<td align="center"><a href="javascript
: document.orderform.submit();"
onmouseover="document.atcButton.src='skin1/images/atcButton2.gif';"
onmouseout="document.atcButton.src='skin1/images/atcButton.gif';">
<img name="atcButton" src="skin1/images/atcButton.gif" width="200px" height="37px" />
</a>
</td>
</tr>