รบกวนช่วนแก้ code login จาก mysql_connect เป็นแบบ odbc_connect หน่อยค่ะ

$loginFormAction = $_SERVER['PHP_SELF'];
if (isset($_GET['accesscheck'])) {
  $_SESSION['PrevUrl'] = $_GET['accesscheck'];
}

if (isset($_POST['user'])) {
  $loginUsername=$_POST['user'];
  $password=$_POST['pw'];
  $MM_fldUserAuthorization = "";
  $MM_redirectLoginSuccess = "main_update.php";
  $MM_redirectLoginFailed = "ไม่พบข้อมูล   User name / password  !!!";
  $MM_redirecttoReferrer = false;
  mysql_select_db($database_database_stb, $database_stb);
  
  $LoginRS__query=sprintf("SELECT user, password FROM register WHERE user='%s' AND password='%s'",
    get_magic_quotes_gpc() ? $loginUsername : addslashes($loginUsername), get_magic_quotes_gpc() ? $password : addslashes($password)); 
   
  $LoginRS = mysql_query($LoginRS__query, $database_stb) or die(mysql_error());
  $loginFoundUser = mysql_num_rows($LoginRS);
  if ($loginFoundUser) {
     $loginStrGroup = "";
    
    //declare two session variables and assign them
    $_SESSION['MM_Username'] = $loginUsername;
    $_SESSION['MM_UserGroup'] = $loginStrGroup;	      

    if (isset($_SESSION['PrevUrl']) && false) {
      $MM_redirectLoginSuccess = $_SESSION['PrevUrl'];	
    }
    header("Location: " . $MM_redirectLoginSuccess );
  }
  else {
    // printf("Location: ". $MM_redirectLoginFailed );
	//echo  ( "User name  or password  Incorrect") ; 
  }
}