if (isset($_POST['userpassword']))
        {
            include('db.php'); //I am using passwordu instead of password.
            $query = "SELECT * FROM users WHERE username = '".$_REQUEST['username']."' AND passwordu = '".md5($_REQUEST['userpassword'])."'";
            $result = mysql_query($query);
            $num_rows = mysql_num_rows($result);
            if ($num_rows == 1)
            {
                echo "Congratulations. You are now Logged in. You will be logged out when the Browser is closed.";
                $_SESSION['logval'] = TRUE;
            }
            else
            {
                            echo "You Have Entered Wrong Information. <b>Please Try AGAIN."; }
?>

if ($num_rows >= 1)
{
   //Correct info
}
else
{
   //Incorrect info
}