title: What are some good pop-up dialog boxes for Ruby on Rails
body: <p>I want to use modal pop-up windows in our web app in Ruby on Rails.  Note that I don't want to create a new browser window, but a sub-window inside the existing webpage.  We've tried things like TinyBox, but there are issues with returning error information from inside the controller.  Any good method or tool that works well in ruby?</p>