I would like to make a page viewable only once, per visitor. It will be a one-time offer that suscribers to my list receive when they sign up. I want to be able to say that if they choose to decline the offer and exit the page, they will never see that offer again. Naturally, I need it so that even a bookmark won't let them back to the page. Thanks for any help, if anyone wants a free Adsense website, just go to my profile and visit my homepage.
You would have to use cookies and IP address logging I believe, along with session authentication sort of stuff. I began reading up on it a while ago, but never got anywhere.
You wouldn't use cookies, because there would be a thousand ways of seeing the offer again. You would use PHP/MySQL along with your subscription system to do a once-per-email-address system. You set a variable in MySQL once they see the offer. You'd have to setup your subscription script to create an account for them too, otherwise you lose your tracking capability. I don't have time to write any code for you though, sorry.