，基本掌握了Ext的语法和运行原理，可以作出一些简单的应用。本节我们一起来完成复杂点的对话框操作，因为在实际项目中经常要用到确认对话框等多种操作-, Ext mastered the syntax and operation principles, can make some simple applications. In this section we point a dialog box up and operation of complex, as is usually used in p