This week's book giveaway is in the Java in General forum. We're giving away four copies of Think Java: How to Think Like a Computer Scientist and have Allen B. Downey & Chris Mayfield on-line! See this thread for details.
There was a method I used a few years back that was similar to "HttpSession.invalidate()". The difference was that it destroyed all sessions in the user's browser, not just for my site. Maybe clearing their cache? Anyone remember this method??