var openAnswerID = false;
function toggleAnswer (answerID) {
if (openAnswerID) {
  Element.removeClassName("question" + openAnswerID, "faqExpanded");
  Element.removeClassName("answer" + openAnswerID, "faqExpanded");
}
Element.addClassName("question" + answerID, "faqExpanded");
Element.addClassName("answer" + answerID, "faqExpanded");
openAnswerID = answerID;
}