无论你是Ext库的新手，抑或是想了解Ext的人，本篇文章的内容都适合你。本文将简单地介绍Ext的几个基本概念，和如何快速地做出一个动态的页面并运行起来，假设读者已具备了一些Javascr ipt经验和初级了解HTML Dom。-Whether you are new to Ext library, or people who want to learn Ext, the contents of this article are suitable for you. This article will briefly introduce a few Ext basic concepts, and how to quickly make a dynamic page and run them, assume that the reader already has some experience and initial understanding of Javascr ipt HTML Dom.