function validate() {
  if (document.SendMail.user_email.value.length < 1) {
    alert("Please enter your e-mail address.");
    document.SendMail.user_email.focus();
    return false;
  }
  if (document.SendMail.message.value.length < 1) {
    alert("Please enter a message.");
    document.SendMail.message.focus();
    return false;
  }
  return true;
}