For example look at this website
http://www.seek.com.au/

I want to make one with 3 search bars, the first one will be a manufacturer for ink cartridge, next bar is the series and the next bar the model.

But also lets say the first bar (Manufacturer) they pick Xerox, then the second bar is only to have the series for that particular manufacturer that they have chosen...........

Thanks

Either pay a professional designer or do some work, surely? Aren't you just asking people to do your work for you instead for free, stuff you can look up on google. Surely they need to be paid for their time?

bahahaha
why? I just figured out how to do it.
Well I was thinking of doing it in javascript but it would be a lot of typing and be heavy if I have lots of products.

But I never thought about pulling info from a database, now when the products are added in wordpress backend, it will automatically will add the series and model to the search funchtion which makes it faster and simpler.