Rails 3 - AJAX Response


I need help with some AJAX in rails 3.

So basically, I have a select option in my index page for my User
model. This select option is a form that modifies the user's type. The
" :remote => true " works and the type is changed when hit the submit
button. But, nothing happens in the browser. The user is updated.

I'm actually not sure where to put either my JS / RJS file ( I've
tried both, but neither do anything. )

So here's my code:

The form: