fergusKe

function isScrolledIntoView(elem) {
    var docViewTop = $(window).scrollTop();
    var docViewBottom = docViewTop + $(window).height();

    var elemTop = $(elem).offset().top;
    var elemBottom = elemTop + $(elem).height();

    return (elemTop <= docViewBottom) && (elemBottom >= docViewTop);
}

fergusKe

(function($) {
  var dataLayer =  window.dataLayer || [];
  var eventString = 'cusevent';
  var eventCategoryString = '張曼娟活動頁';
  
  var areaIndex = 0;
  var areaIndexArr = [];

  $(window).scroll(function() {
    var windowHeight = $(window).height();