title: Change Value of Instance Variable in Ruby
body: <p>I have an instance variable in my controller and would like to increment it's value with Javascript.  Am I able to do this?  If so, how and where do I put this Javascript file?</p>
  
  <p>A simple counter is all that I'm looking for.  I'm not sure if I should look into calling AJAX instead.  I need this to be done on the client-side without any page refreshes.</p>