I am using rails v3.2.2 and jquery-rails v2.0.2 ruby-gems. I would like to display some more information when I move the mouse pointer over a button like, for example, Facebook, Google and other companies makes in their applications.
The following is a screenshot from Google Gmail that shows what I would like to implement in my application:

How and what can I do?
Check out the Qtip jQuery tooltip plugin.