<input type="radio" name="paymentType" value="<?php $action ='../page/sds/3'?>">
<input type="radio" name="paymentType" value="<?php $action ='../page/sds/4'?>">
<input type="radio" name="paymentType" value="<?php $action ='../page/sds/5'?>">
<form target="_blank" method="POST" action="<?php echo $action; ?>">