ringmaster

If a surfer wants to leave/exit my freesite, what's the most productive way to keep him in my grasp?. By leaving the freesite, I mean using the backbutton, closing the window, or using an exit text link. Should all 3 of those exits go to the same thing, or should each exit method have it's own function. Yes, I'm a newbie and obvously i need help on this. Any help would be greatly appreciated