if (isset($_POST['dt_enter_insert'])  ||  isset($_POST['dt_enter_ready'])) {
        if ((isset($_POST['dt_config_more'])  &&  $s_cust['enter']['another_row'] == false)  ||
            (!isset($_POST['dt_config_more'])  &&  $s_cust['enter']['another_row'] == true)) {

            // 'insert another row'-setting is changed