$hra=mysql_query("SELECT * FROM `system` WHERE `id` LIKE 'vtip' LIMIT 0,1 ");
$kontrola =mysql_fetch_array($hra); $pocet=$kontrola["data"];
$vtip=rand (0, $pocet);
$vtipsql=mysql_query(" SELECT * FROM `vtipy` WHERE id like '$vtip' LIMIT 0,1 ");
$vtipy=MySQL_Fetch_Array($vtipsql);
echo $vtipy["vtip"] ;
?>