if ((document.easyform.ghost[0].checked 
         + document.easyform.ghost[1].checked 
         + document.easyform.ghost[2].checked) > 2)
    {
         alert("Hey! You cannot be a ghost and not be a ghost!  Please answer the question again.");
   	 return false;
    } else {
   	 alert("Thanks for filling out my questionnaire, "
               + document.easyform.yourname.value
               + ".");
   	 return true;
    }