SQL 2.0.3

Is it possible to have drop down select fields on the home page for the Categories and subcats that visitors can choose from? I have about 10 major categories and 30 subcats under each. I would like to have a selct box for the Category and a select box for the subcats so that the vistor could choose the "Region" and the "Specialty" on the home page. They would then go directly to the link.

Thanks,
Tommy