跳转顶部添加条件判断

@@ -31,9 +31,11 @@ exports.init = function() {
                 .addClass('hide')
                 .eq(index)
                 .removeClass('hide');
-                
-            //scroll to top
-            $(document).scrollTop(thisContainer.offset().top);
+
+            //scroll to top when container is fixed
+            if (thisContainer.find('.thumb-container').hasClass('fixed')) {
+                $(document).scrollTop(thisContainer.offset().top);
+            }
         });
 
         //默认选中第一个