Automan_Empire - 8:04 am on Feb 22, 2005 (gmt 0)
Tread carefully, this is the type of thing that could backfire bigtime. Speaking for my own webshopping taste, I wouldn't want the digital equivalent of a shopkeeper grabbing my sleeve at the door and asking why I didn't buy anything! It sounds less annoying than disabling the back button, but not by a whole lot.
Perhaps if there is a way to see where the visitors went... typed URL, back button, window closed etc... you could content yourself with trying to "reverse engineer" the reason they left. If you can discover what percentage do or don't come back to make a purchase... that too is useful data. This won't give you the direct info you seek, but stands little chance of alienating shoppers who were going to come back anyway.