Banking Time

Hi, I am trying to figure out how can i support two sets of users on same DB (radius/MySQL), where one set of users are able to bank the time, and others not. For example. User A buys a plan that is good for 2 hour.... he/she logs in and after 1 hour logs out. One day after User A is again able to log in and use the remaining 1 hour. User B buys a plan that is also good for 2 hours.... he/she logs in and after 1 hour logs out. But One day after User B is not able to log in as the time was calculated from the time, when user first logged in. Thanks. With Regards, Prabh -- Get your news at www.DailyHeadlines.NET