so there's another problem.. Actually I have a login page in my application. When user login with the appropriate credentials, different screens open up for different purpose. Each screen has a link called SignOut on the top of the page. Whan user logs out, he jumps to the login screen but when he clicks on "Back" button, he is able to see previous pages. I want back button disabled or any other solution so that after logging out user will not be able to see those pages. Please guide me accordingly.