two submit buttons redirecting to two scripts

Hello, I am very new to this group. I have a very simple question. Please look at this form, http://antriksh.com/resources/2_submit_button_form.shtml here I want to change the echo statement in the script "action.php" to redirect it to another script. ie, I want to change the form action dynamically. How can I modify this form to do so? I tried few PHP tricks that did not work for me. So I am asking this questions to anyone who may be able to help. Thank you , Sonal