scusatemi....
Codice PHP:
if($_POST['go'])
{ $q=mysql_query("UPDATE insclienti SET datains='".date('Y-m-d', strtotime($_POST['datains']))."', .....
}else{ .....
<input type="text" name="datains" size ="12" value="<?php echo date('d-m-Y',strtotime($r['datains']));?>"> ......