Build a Javascript Timeline

I need someone to create a javascript timeline which contains various input fields. The script also needs to change the bullets of the timeline (example in attached file). The timeline should be REALLY EASY to implement. Ideally, I would only need to create a wrapper around the 5 input fields which then creates the timeline using javascript code. The code will run in a Ruby on Rails application and needs to be reused in different contexts. Multiple timelines per page should also be possible. I am not sure what the best framework is etc. The example was created by me using some basic jQuery code.