0]' ") or die(mysql_error());
        }
        else
        {
        mysql_query("INSERT INTO logovani (id_log, ID_uc, ID_st, Login, kontext, datum) VALUES ('NULL','NULL','$pole[0]','$Login', '$kontext', '$datum') ") or die(mysql_error());
        }
       
       
       /*   
        mysql_query ("IF EXISTS (SELECT ID_st FROM logovani WHERE Login='$Login')
        UPDATE logovani SET datum='$datum' WHERE Login='$Login'                                 //dobry napad ale nefungovalo
        ELSE
        INSERT INTO logovani (id_log, ID_uc, ID_st, Login, kontext, datum) VALUES ('NULL','NULL','$pole[0]','$Login', '$kontext', '$datum')") or die(mysql_error());
         
       */      
                
        }
        $vysl = mysql_query($dotaz);  
        $pocet_radku = mysql_num_rows($vysl);
        $pole = mysql_fetch_array($vysl);
        $_SESSION['id_host'] = $pole[0];                  //ID navstevnika
        $_SESSION['log_jmeno']=$Login;           //Login navstevnika
        $_S