function invia(form){
//Nome_Azienda,Riferimento,Telefono,E_mail
	if ( (form.Nome_Azienda.value == "") || (form.Nome_Azienda.value.replace(/ /gi,"")=="") ) {
		alert("The form field Company name is mandatory");
		form.Nome_Azienda.focus();
		return false;
	}
	if ( (form.Riferimento.value == "") || (form.Riferimento.value.replace(/ /gi,"")=="") ) {
		alert("The form field Contact is mandatory");
		form.Riferimento.focus();
		return false;
	}
	if ( (form.Citta.value == "") || (form.Citta.value.replace(/ /gi,"")=="") ) {
		alert("The form field City is mandatory");
		form.Citta.focus();
		return false;
	}
	if ( (form.Provincia.value == "") || (form.Provincia.value.replace(/ /gi,"")=="") ) {
		alert("The form field Country is mandatory");
		form.Provincia.focus();
		return false;
	}
	if ( (form.Telefono.value == "") || (form.Telefono.value.replace(/ /gi,"")=="") ) {
		alert("The form field Telephone is mandatory");
		form.Telefono.focus();
		return false;
	}
	if ( (form.E_mail.value == "") || (form.E_mail.value.replace(/ /gi,"")=="") ) {
		alert("The form field E-mail is mandatory");
		form.E_mail.focus();
		return false;
	}
	return true;
}