function validate(fullname, contact_details) {

      if (document.form1.fullname.value.length < 8) {

      alert("Please enter your Full Name ");

      return false;

    }

      if ((document.form1.phone.value.length < 8) &&  (document.form1.mobile.value.length < 10) && (document.form1.email.value.length < 10)) {

      alert("Please enter a valid phone number or eMail address, so we can get back to you.");

      return false;

   	}

    return true;

  }