页面过期或会话过期如何处理刷新或后退按钮？

Can anyone please explain how can we make a page expire when click on back button? If we put response header as noCache does this work? I have seen many online banking sites where session gets expired when trying to refresh a page or when trying to perform another action before getting the response for previous action or use back button. How this can be achieved in easiest way?Can anyone please explain how can we make a pag