ExtJS是一种主要用于创建前端用户界面，是一个基本与后台技术无关的前端ajax框架，学习文档。-ExtJS is mainly used to create a front-end user interface, which is a base-independent front-end and back-end technology the ajax framework of learning document.

关于EXT的学习，主要是用来增加页面的特效，增加用户的体验-About EXT study, is mainly used to increase the effects of the page, to increase the user experience