Weigting a random selection

I have an internal project I'm working on where I would like to randomly send visitors to different pages, but, I want to be able to give some pages a better chance of getting shown. So, my thought was that I would have a database table that had records for each URL and it's weight. Then, the program could randomly choose a record, but, taking into account the weighting. My question is, how in the heck do I make it read the weighting for each record and then properly figure out how to make a random selection basted on the weights? Does that make sense? Any help is greatly appreciated! John Hawkins __________________________________________________ Do You Yahoo!? Send your FREE holiday greetings online! http://greetings.yahoo.com