Hmmm peanut butter

Ajax is a technology that allows a more desktop-like, interactive user experience to
happen in the web browser. Basically, Ajax allows the browser to make remote re-
quests in the background. These requests update the current page without reloading.
Ruby on Rails has excellent support for Ajax baked right into the framework. Remote
JavaScript (RJS) templates build upon the Ajax support offered by Rails 1.0, but go
one step further, by allowing you to easily update multiple page elements.
RJS templates are a powerful new addition to Rails 1.1. Unlike other Rails templates,
which are rendered and sent to the browser, RJS templates are used to update pages
that have already been rendered.