Very simple, slick, and usable autocomplete. This plugin return an array from the controller and the values will propagate.
Some caching is enabled, so if you have already typed a word and undo then retype it won't make more ajax calls.
This plugin requires you to retrive the data that you want display (like from database), the data provided is
for demonstration purposes only.
Please note that this is a stand alone plugin for Cjax, so you have to download the plugin to be able to use it.