This week's book giveaway is in the OCMJEA forum. We're giving away four copies of OCM Java EE 6 Enterprise Architect Exam Guide and have Paul Allen & Joseph Bambara on-line! See this thread for details.
How can we maintain a single session for a user. Situation: user1 login to the website.we are maintaining the session. same user logs into the website again with other browser or another machine. now we have to alert that this user is already logged in.