function verifyForm() {
  if (document.contactform.name.value.length < 1) {
   alert("Please fill in your name.");
   document.contactform.name.focus();
   return false;
  }
  if (document.contactform.email.value.length < 1) {
   alert("Please fill in your e-mail address.");
   document.contactform.email.focus();
   return false;
  }
  if (document.contactform.message.value.length < 1) {
   alert("Please give details of your inquiry.");
   document.contactform.message.focus();
   return false;
  }
 
  return true;
 }