How to show popup window instead redirect to facebook?

I use this tutorial to authenticate users via facebook. But I need to need to show popup window instead redirecting to facebook site.

How can I do that?

I think, it not possible to do, After facebook login, it will redirect to the redirect url which we given at the time of app creation.

I've managed to put together a project that uses Node.js, PassportJS with Facebook, MongoDB, REquireJS and Backbone.js

Check it out. I hope that's what you are looking for.