asp.net cookie

I have an asp.net product site made with the use of Dreamweaver MXs' asp.net features. First I must tell you that the site has two main product categories which are "hifi" and "profesyonel" in the product detail page(which are "[login to view URL]" and "[login to view URL]") there is a price requsting feature in an iframe(which are "[login to view URL]" and "[login to view URL]"). The viewer must enter his e-mail adrees in order to view the price information of the related product. My problem is; the customer has to leave his e-mail address again and again when he wants to view a diffrent product. To solve this issue, I need a cookie placement which will include the information that the viewer has left his e-mail address before and prevent asking it again and again. Leaving the e-mail address once should be enough, and if the customer has left his e-mail address before, the iframe must display the product price directly without asking for e-mail address again. Thats all... Also I've attached the site files for your review... ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Deliverables must be in ready-to-run condition, as follows (depending on the nature of the deliverables): a) For web sites or other server-side deliverables intended to only ever exist in one place in the Buyer's environment--Deliverables must be installed by the Seller in ready-to-run condition in the Buyer's environment. b) For all others including desktop software or software the buyer intends to distribute: A software installation package that will install the software in ready-to-run condition on the platform(s) specified in this bid request. 3) All deliverables will be considered "work made for hire" under U.S. Copyright law. Buyer will receive exclusive and complete copyrights to all work purchased. (No GPL, GNU, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site per the coder's Seller Legal Agreement). ## Platform windows asp.net