Merge branch 'release/5.0.0'

@@ -18,7 +18,7 @@ function getQueryString(name) {
     var reg = new RegExp('(^|&)' + name + '=([^&]*)(&|$)', 'i');
     var r = window.location.search.substr(1).match(reg);
 
-    if (r != null) {
+    if (r !== null) {
         return window.unescape(r[2]);
     }
     return null;
@@ -40,7 +40,7 @@ function downLoadApp() {
     }, 500);
 }
 
-$('#float-layer-close').on('touchend', function(e) {
+$('#float-layer-close').on('touchend', function() {
     $('#float-layer-app').hide();
     window.setCookie('_float-layer-app', 'id490655927',
         {
@@ -61,9 +61,9 @@ if ($('#float-layer-btn') && $('#float-layer-btn')[0]) {
         e.srcEvent.stopPropagation();
     });
 
-    // if (typeof window.cookie === 'function' && !window.cookie('_float-layer-app')) {
-    //     $('#float-layer-app').show();
-    // } else {
-    //     $('#float-layer-app').hide();
-    // }
+    if (typeof window.cookie === 'function' && !window.cookie('_float-layer-app')) {
+        $('#float-layer-app').show();
+    } else {
+        $('#float-layer-app').hide();
+    }
 }