<input name='skaityti' type='hidden' value='".$_GET['skaityti']."'>
<input name='bla' type='button' value='atnaujinti'>
if(isset($_POST['bla'])) {
$result = dbquery("UPDATE ".$db_prefix."news (news_datestamp) VALUES ('".time()."'); WHERE news_id='".stripinput($_POST['skaityti'])."'");
}