please tell me how can i perform session handling along with back button problem.If i press back button my previous page gets generated which it should not.
Abhinav, A common approach is to put a token in the session on the first request. If the token is already there, the back button should not re-render the page.
Note that any approach you take only works for those pages going to the server. If the page is cached locally (like for GET requests), it will be displayed anyway.