auto session gem / auto session warning gem?

Has anyone used these two gems in their web app? I added them to my gem file, and did a bundle install.

I was trying to find out where it stuck the javascript files. Anyways, I set it to expire within 10 minutes, no luck yet.

I have the following in my application.js file…

//= require jquery
//= require jquery_ujs

I guess I need to add the following too... jquery-ui or is jquery_ujs the same?