Код:
<table><tr><td>
<form action=location1 name=formz1>
<input type=text>
<input type=text>
</form>
<form action=location2>
<input type=submit value="Назад">
</form>
<td valign=center>
<input type=button value="Далее" onClick='document.formz1.submit();'>
</table>