使用Javascript可以从HTML页面中的servlet设置的会话属性中获取值

I have a servlet that forwards to a HTML page, using redirect. Because I am using ajax and php on the html page to do other functions. Can turn into a jsp. Is there a way I can get the name -"poNumber" I get in servlet in the session attributes. I was to get it and display it's value.I have a servlet that forwards to a HTML page,