if(isset($_POST['btn-save'])) {

        $hostname = "localhost";
        $username = "";
        $password = "";
        $databasename = "";

            $connect = mysqli_connect($hostname, $username, $password, $databasename);

            $ID = $_GET['id'];
            $TrainerName = $_POST['TrainerName'];
            $TrainerUrl = $_POST['TrainerLoadUrl'];
            $TrainerUrlDescription = $_POST['TrainerLoadDescription'];
            $TrainerUrlButtonFilename = $_POST['TrainerFileShortName'];

            $ID = mysql_real_escape_string($connect, $_GET['id']);
            $TrainerName = mysql_real_escape_string($connect, $_POST['TrainerName']);
            $TrainerUrl = mysql_real_escape_string($connect, $_POST['TrainerLoadUrl']);
            $TrainerUrlDescription = mysql_real_escape_string($connect, $_POST['TrainerLoadDescription']);
            $TrainerUrlButtonFilename = mysql_real_escape_string($connect, $_POST['TrainerFileShortName']);


            mysqli_query($connect, "UPDATE `Trainers` SET `Trainer_name`='.$TrainerName.',`Trainer_url`='.$TrainerUrl.',`Trainer_url_description`='.$TrainerUrlDescription.',`Trainer_url_button_filename`= '.$TrainerUrlButtonFilename.' WHERE `trainer_id` = $ID");

            mysqli_error($connect);
            mysqli_close($connect);

        }