$con=mysql_connect(DB_HOST,DB_USER,DB_PASSWORD) or die("Failed to connect to MySQL: " . mysql_error());
$db=mysql_select_db(DB_NAME,$con) or die("Failed to connect to MySQL: " . mysql_error());
/*
$ID = $_POST['username'];
$Password = $_POST['password'];
*/
function SignIn()
{
    session_start();   //starting the session for user profile page
    if(!empty($_POST['username']))   //checking the 'user' name which is from Sign-In.html, is it empty or have some text
    {
        $query = mysql_query("SELECT *  FROM UserName where userName = '$_POST[username]' AND pass = '$_POST[password]'"); #or die(mysql_error());
        $row = mysql_fetch_array($query) or die(mysql_error());
        if(!empty($row['userName']) AND !empty($row['pass']))
        {
            $_SESSION['userName'] = $row['pass'];
            echo "Successful Login";
            header('Location: control.html');
            die();
        }
        else
        {
			$_SESSION['userName'] != $row['pass'];
            echo "Incorrect Password";
            header('Location: index2.html');
            die();
        }
    }
}
if(isset($_POST['login']))
{
    SignIn();
}