function isSecurer()
{
$tmp1 = $_SERVER["HTTP_REFERER"];
$tmp2 = $_SERVER["SERVER_NAME"];
$pattern = "/http:\/\/([^\/:]+)(\d*)\/.*/i";
preg_match($pattern,$tmp1,$referer);
return(($referer[1]==$_SERVER["SERVER_NAME"]) || ($_SERVER["HTTP_REFERER"]==""));
}