jQuery UI dialog submit form to another page for PHP

Hi,
I want to allow non-registered guests to register their details by
when they click the "register" link, the jQuery UI dialog pops up and
asks them for their name, email and password.
I then wish to submit these details to another page where I can pick
them up using php $_POST[''].
Is this possible? as I've been looking around the jQuery site and
google for days!
Many Thanks