Creating unsubscribe button for supporter

Can anybody guide me on creating a Cancel Subscription button to place on the supporter_paypal_gateway.php page. I’m wondering if the following code would work:

<form action=”https://www.paypal.com/cgi-bin/webscr&#8221; method=”post”>

<input type=”hidden” name=”cmd” value=”_subscr-find”>

<input type=”hidden” name=”business” value=”blah”>

<input type=”hidden” name=”receiver_email” value=”‘ . get_site_option( “supporter_paypal_email” ) . ‘”>

<input type=”hidden” name=”alias” value=”‘ . get_site_option( “supporter_paypal_email” ) . ‘”>

<input type=”hidden” name=”custom” value=”2″>

<input type=”hidden” name=”return” value=”‘ . $blog_url . ‘wp-admin/supporter.php?updated=canceled&updatedmsg=’ . urlencode(__(‘Subscription Canceled!’, ‘supporter’:wink:) . ‘”>>

<input type=”image” src=”https://www.paypal.com/images/cancel_subscribe_gen.gif&#8221; border=”0″ name=”submit” alt=”Make payments with PayPal – it’s fast, free and secure!”>

<input type=”hidden” name=”txn_type” value=”subscr_cancel”>

<input type=”hidden” name=”recurring” value=”1″>

<input type=”hidden” name=”reattempt” value=”1″> </form>

Would appreciate it if someone offer some guidance. I would like the button to appear above the list of subscription plans.