if($_POST['Login']) {

        $user = stripslashes($_POST['user']);
        $pass = stripslashes($_POST['pass']);
        $user = mysql_real_escape_string($user);
        $pass = mysql_real_escape_string($pass);

        $pass = md5($pass);


        if($user == "" || $pass == "")
        {
            echo "<center><b>Moras upisati Ime i Lozinku!</b></center>";
            echo "<br>";
        }
        else
        {
            $query = mysql_query("SELECT * FROM users WHERE username='$user' AND password='$pass'");
            $row = mysql_fetch_array($query);

            if($user == $row['username'] && $pass == $row['password'] && $row['admin'] =="1")
            {
                session_register("userid");
                    $_SESSION['userid'] = $row['id'];
                session_register("username");
                    $_SESSION['username'] = $row['username'];
                session_register("admin");
                    $_SESSION['admin'] = $row['admin'];

                echo "<meta http-equiv=\"refresh\" content=\"0;url=index.php\">";
            }
            elseif($user == $row['username'] && $pass == $row['password'] && $row['admin'] !="1")
            {
                session_register("userid");
                    $_SESSION['userid'] = $row['id'];
                session_register("username");
                    $_SESSION['username'] = $row['username'];
            }

            else
            {
                echo "<center><b>Pogresno Ime ili Lozinka!</b></center>";
                echo "<br>";
            }
        }
    }