fix sessionStorage activeTab for ios

app/index.html

@@ -212,20 +212,26 @@
 <script>
 <script>
     $(document).ready(function() {
     $(document).ready(function() {
         $("#footer").load("main-footer.html", function() {
         $("#footer").load("main-footer.html", function() {
-            if (!sessionStorage.activeTab) {
-                CHK.loadDashboardSetting(function() {
-                    if (CHK.dashboardSetting.dashboardHome) {
+            let activeTab;
+            if (typeof sessionStorage != 'undefined' && sessionStorage.activeTab != 'undefined') {
+                activeTab = sessionStorage.activeTab;
+            }
+            if (typeof activeTab != 'undefined') {
+                if (activeTab == 'dashboard') {
                     CHK_Footer.goDashboard();
                     CHK_Footer.goDashboard();
                 } else {
                 } else {
                     CHK_Footer.goOperationList();
                     CHK_Footer.goOperationList();
                 }
                 }
-                });
-            } else if (sessionStorage.activeTab === 'dashboard') {
+                return;
+            }
+            CHK.loadDashboardSetting(function() {
+                if (CHK.dashboardSetting.dashboardHome) {
                     CHK_Footer.goDashboard();
                     CHK_Footer.goDashboard();
-            } else if (sessionStorage.activeTab === 'operationList') {
+                } else {
                     CHK_Footer.goOperationList();
                     CHK_Footer.goOperationList();
                 }
                 }
             });
             });
         });
         });
+    });
 </script>
 </script>
 </html>
 </html>
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