function maj_geo(str_Geo)
{
	switch(str_Geo)
	{
		case "REG":
			if (document.formu.db_Commune)
				document.formu.db_Commune.options[0].selected = true;
			document.formu.db_Departement.options[0].selected = true;	
			break;
		case "DPT":		
			if (document.formu.db_Commune)
				document.formu.db_Commune.options[0].selected = true;
			break;	
	}
	document.formu.submit();
}