oh. the results has the if isset get:
<?php
$searchWADAcac_prod_subcategory_leveltwo_NEW_WADbSearch1 = new WA_MySQLi_Search("WADAcac_prod_subcategory_leveltwo_NEW","");
if (isset($_GET["Search"]) || isset($_GET["Search_x"])) {
$searchWADAcac_prod_subcategory_leveltwo_NEW_WADbSearch1->clearSearch();
$searchWADAcac_prod_subcategory_leveltwo_NEW_WADbSearch1->setSearch(array("type"=>"Key", "comparison"=>"includes", "join"=>"AND", "and"=>", ", "or"=>" ", "start_encap"=>"\"", "end_encap"=>"\""), array("prod_name", "prod_name2", "part_no"), "s", "".(isset($_GET["prod_name"])?$_GET["prod_name"]:"") ."");
}
?>
So...it has to be GET method. But then it doesn't pass values.