$mode=$_POST["submit"];
switch($mode)
{
case "submit":
	$error="";
	$error=validationform($_POST);
	if(empty($error))
		{	 $tablename = "contactus";
			insertform($tablename, $_POST);
			thanku();

		}
		else {
				displayform($_POST, $error);
				}

	break;
	 default:
              displayform($post, "");
  	 break;
}

include("template/footer.php");
function displayform($post, $error="")