They are all set to and. I'm guessing since the url thats returned has & in between each of the criteria. see below.
revtivity.com/002jfood_Results.php?S_CategoryID=9&S_BrandID=7&S_Description=&Search.x=68&Search.y=6&Search=Search
Your friends over here at WebAssist! These Dreamweaver extensions will assist you in building unlimited, custom websites.
These out-of-the-box solutions provide you proven, tested applications that can be up and running now. Build a store, a gallery, or a web-based email solution.