sounds to me like it's best done in JavaScript, like:

<form name="f1" action="subscribe.pl">
<input type="radio" onClick="document.f1.action='subscribe.pl'"> Subscribe to the newsletter
<input type="radio" onClick="document.f1.action='unsubscribe.pl'"> Unsubscribe
(...)
</form>

In reply to Re: changing Form Action before submit click by fraktalisman
in thread changing Form Action before submit click by ralijani

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