I'm currently setting up a new website which uses facebook authentication to log in users. I'm wondering how I would go about showing a landing page for unauthenticated users using codeigniter. I'm using the javascript api. I already have the authentication set up, but I don't think a redirect is the way to go. Currently it's just a single page which asks for a log in if you're not logged in. I want a facebook.com style authentication method where the users is prompted with an unauthenticated landing page (without redirect) and another page when a user IS authenticated. Any ideas?

I'm using the facebook javascript API

Someone proposed using the jquery load function to get a landing page, but I'm not sure if that is the correct way to go. How would you guys do it?