function checkForm() {

        if (document.getElementById("contacts").nome.value == "") {
           document.getElementById("nomeError").style.display = "inline";
           document.contacts.nome.focus();
           return false;
        }
		else if (document.getElementById("contacts").tel.value == "") {
          	document.getElementById("telError").style.display = "inline";
            document.contacts.messaggio.focus();
       		return false;
        }
        else if ((document.getElementById("contacts").mail.value == "") || (document.getElementById("contacts").mail.value.indexOf("@") == -1) || (document.getElementById("contacts").mail.value.indexOf(".") == -1)) {
          document.getElementById("mailError").style.display = "inline";
          document.contacts.mail.focus();
          return false;
        }

        else if (document.getElementById("contacts").messaggio.value == "") {
          	document.getElementById("messError").style.display = "inline";
            document.contacts.messaggio.focus();
       		return false;
        }
        else if (document.getElementById("contacts").captcha.value != "4") {
          	document.getElementById("captchaError").style.display = "inline";
            document.contacts.messaggio.focus();
       		return false;
        }
	else {
           document.getElementById("contacts").action = "send.php";
           document.getElementById("contacts").submit();
	}
  }