i put an if statement around each comparison so it would only be added if the corresponding form element where set and not equal to a blank string:
if(isset($_GET['dt_berths']) && $_GET['dt_berths'] != "") {
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.