exam =========   this is an exam app ,version reserved by dlnu   1.下载extjs4.1.1 download url: http://www.sencha.com/products/extjs/download/ext-js-4.1.1/1683  2.解压extjs4.1.1.zip 将extjs4.1.1重命名为extjs   3.extjs放在与apps同一级目录的位置(必须是web服务器目录下，否则无法访问，建议搭建一个wamp或者tomcat环境)  4.访问app/exam/index.html 就ok