I am looking for some ideas on how to do this and pointers to books or web resources here. I have two lists "A" and "B", where for every value of A there is a value of "B". I want to set up a small search facility on my website. Just a little thing where for every value of "A" chosen, the corresponding value of "B" should be displayed. How do I do this? Set up a database or flat file ? Either way, what tools are recommended and how to set this up? Do help!