This week's book giveaway is in the General Computing forum. We're giving away four copies of Arduino in Action and have Martin Evans, Joshua Noble, and Jordan Hochenbaum on-line! See this thread for details.
Like James said, there isn't really any complete and safe way to implement it, but I've seen it it done with moderate success using JSPs and Servlets, implementing a Model-View-Controller (MVC) pattern with a global controller and allowing the controller to dictate the page displayed. (with the additional functionality to prevent the client from caching pages) If you can find a solution that doesn't require disabling the back button, you'll be a lot happier. Dave.
"sshekar", The Java Ranch has thousands of visitors every week, many with surprisingly similar names. To avoid confusion we have a naming convention, described at http://www.javaranch.com/name.jsp . We require names to have at least two words, separated by a space, and strongly recommend that you use your full real name. Please log in again with a new name which meets the requirements. Thanks. Dave