$(document).ready(function() {
  $('div.demo-show2> div').hide();
  $('div.demo-show2> h3').click(function() {
 var $nextDiv = $(this).next();
 var $visibleSiblings = $nextDiv.siblings('div:visible');
 if ($visibleSiblings.length ) {
   $visibleSiblings.slideUp('fast', function() {
  $nextDiv.slideToggle('fast');
   });
 } else {
    $nextDiv.slideToggle('fast');
 }
  });
});