function guest_book_validate(info){
  if (info.name.value == null || info.name.value == "")
  {
	  alert("Your name is required.");
  	info.name.focus();
	  return false;
  }

  if (info.comments.value.length <= 0)
  {
	  alert("Comments field cannot be left blank.");
	  info.comments.focus();
	  return false;
  }
}