Considering migrate YUI 2 to version 3

Compared with YUI2, YUI3 is robust and feature-rich. It exceeds the functional level of YUI2. Also, there is a YUI 2-in-3 project, which allows developers to include and use YUI2 from within YUI 3 projects. This is fairly easy and safe. Full details available here: http://bit.ly/A5qztD