<script>
$(document).ready(function () {
  $('#product-details').children().hide();
  $('.productBenefits').show();
  $("#buttoncollection li:nth-child(1)").addClass('selected');
  $('#buttoncollection .showHide').click(function (event) {
    $('#product-details').children().hide();
    $('#product-details .' + event.target.id).fadeIn(500);
  });
});
</script>