Reset Child menu
as you can see at this url (Registrazione.php), i have a parent 'Regione' and a child 'Provincia'. The menues are dynamic with only one static option (value 0). When i choose the region, everything is ok. But when i come back to the static option '0' (in the 'Regione' menu), the child becomes empty. I can correct this behaviour by adding in the recordset all the child element with the PARENT_ID = 0. Is there a way to do it automatically? Finally, i would appreciate that when i select the parent id = 0 ('Seleziona una regione'), i can see all the items in the child menu.