不使用es6

js/index.js

   var loadHtmlArr = [
     // "cover",
     // "preface",
-    // "section_1",
+    "section_1",
     "section_2",
     // "section_3",
     // "section_4",

js/section_1.js

       barMinHeight: $.UnitUtil.mm2px(2),
       barGap: 0,
       data: [60, 70],
-      itemStyle
+      itemStyle: itemStyle
     },
     {
       name: "最高分",
       barMinHeight: $.UnitUtil.mm2px(2),
       barGap: 0,
       data: [50, 60],
-      itemStyle
+      itemStyle: itemStyle
     },
     {
       name: "最低分",
       barMinHeight: $.UnitUtil.mm2px(2),
       barGap: 0,
       data: [30, 40],
-      itemStyle
+      itemStyle: itemStyle
     },
     {
       name: "平均分",
       barMinHeight: $.UnitUtil.mm2px(2),
       barGap: 0,
       data: [40, 50],
-      itemStyle
+      itemStyle: itemStyle
     }
   ];
-  let option = {
+  var option = {
     animation: false,
     color: ["#5C99FF", "#FF5F56", "#5EC5C8", "#f1982b"],
     title: {
       barMinHeight: $.UnitUtil.mm2px(2),
       barGap: 0,
       data: [60, 70],
-      itemStyle
+      itemStyle: itemStyle
     },
     {
       name: "良好率",
       barMinHeight: $.UnitUtil.mm2px(2),
       barGap: 0,
       data: [50, 60],
-      itemStyle
+      itemStyle: itemStyle
     },
     {
       name: "及格率",
       barMinHeight: $.UnitUtil.mm2px(2),
       barGap: 0,
       data: [30, 40],
-      itemStyle
+      itemStyle: itemStyle
     },
     {
       name: "低分率",
       barMinHeight: $.UnitUtil.mm2px(2),
       barGap: 0,
       data: [40, 50],
-      itemStyle
+      itemStyle: itemStyle
     }
   ];
-  let option = {
+  var option = {
     animation: false,
     color: ["#5C99FF", "#FF5F56", "#5EC5C8", "#f1982b"],
     title: {
       barMinHeight: $.UnitUtil.mm2px(2),
       barGap: 0,
       data: [60, 70],
-      itemStyle
+      itemStyle: itemStyle
     },
     {
       name: "缺考人数",
       barMinHeight: $.UnitUtil.mm2px(2),
       barGap: 0,
       data: [50, 60],
-      itemStyle
+      itemStyle: itemStyle
     }
   ];
-  let option = {
+  var option = {
     animation: false,
     color: ["#5C99FF", "#FF5F56", "#5EC5C8", "#f1982b"],
     title: {
     barMinHeight: $.UnitUtil.mm2px(2),
     barGap: 0,
     data: [60, 70],
-    itemStyle
+    itemStyle: itemStyle
   }];
-  let option = {
+  var option = {
     animation: false,
     color: ["#5C99FF", "#FF5F56", "#5EC5C8", "#f1982b"],
     title: {