This gem provides the jquery scrollTo project found at http://archive.plugins.jquery.com/project/ScrollTo for the Rails asset pipeline (available since Rails 3.1).
To make use of this project add ONE of the following lines to 'app/assets/javascripts/application.js':
//= require jquery.scrollTo-min
//= require jquery.scrollTo
In your Gemfile, add this line:
gem "jquery-scrollto-rails"
Then, run bundle install.
That's it!