problem in browser back button with logout

[shahidrasul]

hi
in my project when i click on logout anchor it goes to logout page and my code in logout page is

 if (Session["user_id"] != null)
        {
            Session["user_id"] = null;
            Session.Abandon();
            Response.Clear();
            FormsAuthentication.SignOut();
            Response.Redirect("login.aspx");
        }

it properly logout and goes to login.aspx but problem is login.aspx when i click browser back button it goes me again on last page where i click on logout anchor.
please any body know solution of this please reply me

[Curtis Rutland]

When you click the back button the browser is loading from it's cache, not the internet.

I'm not sure what your question is...

[shahidrasul]

my question is when user click on back button after logout, he can't go again in the previous page

[yvrmurari]

<Script>
window.history.forward(1);
</Script>

Add the above code in the page where clearing the session

Ex: Add the code in page 1, click logout takes u to Page 2

Now if u click on back button in page 2, u cannot come back to Page 1

[Plater]

This question comes up at least 2 times a week it seems.
You should be doing the following on every page (or at least every page you don't want the user to be able to use the back button on):
-Set the Caching on the Response object to not cache
-Validate the Session contents