function apriFinestra(largh,alt,URL) {
   if (largh == null || largh == "0") { largh = 200 }
   if (alt == null || alt == "0") { alt = 100 }
   if (URL == null || URL == "") { URL = "#" }
   var winLargh = 0;
   var winAlt = 0;
   objFinestra = window.open(URL,"self","toolbar=no,location=no,status=no,menubar=no,scrollbars=no,resizable=no,width="+largh+",height="+alt+",top="+winAlt+",left="+winLargh);
   if (objFinestra.opener == null) objFinestra.opener = window; 
   objFinestra.creator=self
   objFinestra.focus();
}