non conosco asp ma ad occhio
codice:
ob_start();
header("Expires: Mon, 26 Jul 1997 05:00:00 GMT"); // Data passata
header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
// sempre modificato
header("Cache-Control: no-store, no-cache, must-revalidate"); // HTTP/1.1
header("Cache-Control: post-check=0, pre-check=0", false);
header("Pragma: no-cache"); // HTTP/1.0
if($_COOKIE['mysite']['referer'] == ''){
$_COOKIE['mysite']['referer'] = $_SERVER['HTTP_REFERRER'];
$destination = "destination.asp";
}else{
$_COOKIE['mysite']['referer'] = '';
}