资 源 简 介
其实很简单，就是利用ajax中updatepanel实现无刷新显示
然后利用timer实现重复的调用
application保存聊天信息
session保存登陆人信息-In fact very simple, it is using the ajax in the realization of a updatepanel refresh display and then use the call timer to repeat realize Save chat application information session preservation landing Information
