text: /** initialize global variables */
  (function () {
      if (window._global && window._global.lessons) return;
  
      window._global = {};
      window._global.lessons = [
          {
              seq: 1,
              title: "大標題敘述1",
              subTitle: "簡述內容區簡述內容區1",
              url:{
                  video:"https://www.youtube.com/embed/wnCDhf6Ahw8",
                  detail:`/detail.html?seq=1`
              },
              imgList: [],
              content: ""
          },
          {
              seq: 2,
              title: "大標題敘述2",
              subTitle: "簡述內容區簡述內容區2",
              url:{
                  video:"https://www.youtube.com/embed/18DhaHf5fIE",
                  detail:`/detail.html?seq=2`
              },
              imgList: [],
              content: ""
          },
          {
              seq: 3,
              title: "大標題敘述3",
              subTitle: "簡述內容區簡述內容區3",
              url:{
                  video:"https://www.youtube.com/embed/5Fl711QMBuI",
                  detail:`/detail.html?seq=3`
              },
              imgList: [],
              content: ""
          }
      ];
  })();
  