function noCache()
{
header('Expires: ".gmdate("D, d M Y H:i:s")." GMT');
header('Last-Modified: ".gmdate("D, d M Y H:i:s")." GMT');
header('Cache-Control: no-cache');
header('Cache-Control: post-check=0, pre-check=0', FALSE);
header('Pragma: no-cache');
}