function check() {
   error=0;
   if (document.FORM.VNAME.value=='') { 
      window.alert('Manca il nome/cognome; Name/surname is missing');
      error=1;
      }
   if (document.FORM.EMAIL.value=='') {
      window.alert('Manca l\'indirizzo E-mail; E-mail address is missing');
      error=1;
      }
   if (error==0) {document.FORM.submit();}
   return false;
   }