Generally the look to the line above the one that you are given. You are probably giving an option for cboPrice and cboPrice does not exist as part of $_GET like $_GET['cboRegion'] the best way to check is not string comparing them with nulll, but doing a double check.. I provide this function for you: function DoYouExist($variable) { return (isset($variable) && !empty($variable)); } pass your check to this to see if it it exists and is not empty.. (string comparing to null is an empty check..) Kittypaws