1 files changed, 21 insertions, 0 deletions
diff --git a/docs/js/main.js b/docs/js/main.js
index 5905546711..f1a90e47e8 100755
--- a/docs/js/main.js
+++ b/docs/js/main.js
@@ -1,3 +1,23 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/* Custom JavaScript code in the MarkDown docs */
+
+// Enable language-specific code tabs
 function codeTabs() {
   var counter = 0;
   var langImages = {
@@ -62,6 +82,7 @@ function makeCollapsable(elt, accordionClass, accordionBodyId, title) {
   );
 }
 
+// Enable "view solution" sections (for exercises)
 function viewSolution() {
   var counter = 0
   $("div.solution").each(function() {