If you are new to extjs then for you ExtJS is a cross-browser Javascript framework for building RIA (Rich Internet Application) based web application. It allows to use any server based technologies for building your application. In my application, I am using ExtJS 3.0 as client side technology, Java (JSP+Hibernate) as server side technology and MySQL 5.x as database. Here I will tell you how to setup the above tools and technologies. ExtJS Setup Download latest version of ExtJS from http://extjs.com/products/extjs/download.php . I am using ExtJS 3.0 in my application. If you are using 3.0 version then you can view the API Documentation online at http://extjs.com/deploy/ext-3.0-rc2/docs/ and you can download the API documentation from download page if you are using any older version than 3.0 Extract the contents to any local folders in your disk. ExtJS IDE Setup It is difficult to remember all ExtJS components and its functions, so we need an IDE for development. Although there are few...