Would it be possible to have my add a link ask for a paid link or a free link before the user enters the link information (url, title, etc.)..?

I tried entering something like...

<input type="radio" name="payment_term" value="free">

before the link is accepted, but it did not seem to pass (or it still asked twice rather it was a free or paid link).

Any ideas or suggestions?

---trying not to edit any pm files or create any new cgi files unless they are rudimentary---

Thanks,

- Jonathan