怎样解决不同页面来回切换后，原来数据又不丢失的问题

1.客户端 cookie

2.服务器端session

3.两者子间 cache。

4.javascript。

     Javascript  is a very strong tool to meet the demand of customers which are very difficult and complex questions.Maybe it is the main reason to create the Ajax.

my process

1.page onload ,onblur

2.windows.open

3.window.link.herf

4.document . 

in the window.link.href=http://www.sohu.com; ,should recember the http

window.link.href=www.sohu.com;

the two method is different