Multiple search options...

I am creating a search form for an application we're building and I'm curious how it should be handled. Some search options: Category: Any Computer Programmer Computer Operator etc. Experience can choose between 1 and 2: Any 1 2 3 etc Location: Cities listed Skills: added by resume holder Now I can do one or two of these seperate but can anyone suggest a logic to take to allow someone to say: I'd like to search for Computer Programmers between 1 and 3 years experience in Kitchener and that have these keywords. But the next person may come and say I want Computer Programmers with 2 years experience in any city and any keywords... Jeff