$todos=mysql_query("SELECT doc FROM documentos_fa GROUP BY doc ORDER BY id_documentos ASC ", $link);
while($doc_1=mysql_fetch_array($todos)){// while 1 ?>
echo $doc_1['doc'];?>
$reg=mysql_query("SELECT * FROM documentos_fa WHERE doc='".$doc_1['doc']."' ORDER BY id_documentos DESC", $link);
while($tit=mysql_fetch_array($reg)){ ?>
echo $tit['titulo'];?>
}}?>