Problem with browser caching

[veerapureddy]

Hi All,
I have some problem with browser caching I cleared the cache and also invalidated the session and redirected to the login page if the session has expired, in IE there is no problem if I go back and refresh it is redirecting to the login page, but in mozilla when I click the back button in the browser even its redirecting to the login page but when I refresh the page its showing me the recent page of that particular user loggid in, please suggest me where the problem is!!

i did the following thing in logoff.jsp

session.removeAttribute("user");
     if (session.getAttribute("user") == null) 
        response.sendRedirect("sessionExpiry.do");
     }
   %>

In session expiry I just redirected to login page and invalidated the session

And also I validated the session

if (session.getAttribute("user") == null) {
                 response.sendRedirect("logon.do");
             }

this is what i have done to clear the cache

response.setHeader("Expires", "0");
            response.setHeader("Cache-Control" ,"no-cache, must-revalidate");
            response.setHeader("Pragma", "no-cache");
            response.setHeader("Cache-Control","no-store");