ASP: Dynamic form Lists and dependant text boxes?

I am working on a site at the moment:

http://www.colourstonecards.com/ordering.asp

and I am having trouble with the ordering page. I would like a dynamic form list to look at a database and when the user selects a product code, the text boxes containing description and price change too to reflect the product code.

The user will be entering in their contact details, so I dont want the page to reload too because I will lose that info.

Please does anyone have any suggestions?

It is an attempt at a cheaper alternative to a shopping cart, the order is emailed to the admin once the form has been submited.

Thank You

Grant

you could refresh through a the post variables, and set the value of each field to the variable so it will re-enter the values