This week's book giveaway is in the OO, Patterns, UML and Refactoring forum. We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma on-line! See this thread for details.
I have done the logoff application by adding the following line
but after I clicked on logoff button its is working fine and redirecting to home page, then after i click on the back button in the browser, the previous functionality is still working. what would I do to prevent the previous functionality? or else is there any chances to lock the previous page?