Getting started with Ext JS

Ext JS is a client-side, JavaScript framework for building web applications.

1. Download most current Ext JS release
   - http://www.sencha.com/products/js/download.php
2. Set the URL of s.gif
   

   Ext.BLANK_IMAGE_URL = '/images/ext/resources/images/default/s.gif';

Reference:
http://www.sencha.com/learn/Learn_About_the_Ext_JavaScript_Library