$db = "prova";
         mysql_select_db($db) or exit("Impossibile aprire il DB $db");

		$queryRis = mysql_query("SELECT * FROM login WHERE user='$username' and pass='$password'") or exit("Problemi in query");
		$riga = mysql_fetch_array($queryRis);

		if (!$riga) {
   			header("location: login.php");
			$_SESSION['connesso']=false;
		};
		if ($riga) {
			echo "Accesso effettuato";
			$_SESSION['connesso']=true;

			header('Location: index.php');

			exit;
		};


?>