How to? HTML name/email optin that passes that data onto signup.php?

I think people would be more likely to join with a simple name & email optin box on my main page.

Here's what I'm trying to do:
On submit, I want the name/email data to be passed to the signup.php form.
The user is also redirected to the signup.php form, with a message that only a little more info is required to activate their membership.
(The name/email would not be passed to any autoresponders, just the signup.php page)

How do I make an html form that passes the name & email data to the signup.php form?

I figured it out.

Code:

<form name="input" action="http://yoursite.com/amember/signup.php" method="post">
First Name: <input type="text" name="name_f" />
Email: <input type="text" name="email" />
<input type="submit" value="Submit" />
</form>