Bitrix. Page without header and footer

empty.php

<?php

define('NO_AGENT_CHECK', true);
define("STOP_STATISTICS", true);

require($_SERVER["DOCUMENT_ROOT"]."/bitrix/modules/main/include/prolog_before.php");

//ajax
/*if (!isset($_SERVER['HTTP_X_REQUESTED_WITH']) || empty($_SERVER['HTTP_X_REQUESTED_WITH']) 
      || strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) != 'xmlhttprequest') return;*/

//Code here
require($_SERVER["DOCUMENT_ROOT"]."/bitrix/modules/main/include/epilog_after.php");