Multiple DataAssist Search / Results function

I'm building a website for a client that want to be able to search multiple categories i.e. Clothing Lines, or description, or Rep etc. I've built a simple drop down that will open a new link i.e. "Search Line" etc. From the "Search Line" page I would like to create a search function that searches only the "Clothing lines" data portion of my database. I would like to duplicate this feature on each of the other corresponding pages as well i.e. a separate search on the "Description" page and or the Rep's page.

This is a link to the sample page: searchlineSEARCH.php
the results page is: searchlineRESULTS.php

the results are at the bottom of the page, I haven't placed them in the body yet