add js support for carousel indicators

docs/javascript.html

@@ -1422,6 +1422,11 @@ $('#myCollapsible').on('hidden', function () {
             <p>The slideshow below shows a generic plugin and component for cycling through elements like a carousel.</p>
             <div class="bs-docs-example">
               <div id="myCarousel" class="carousel slide">
+                <ol class="carousel-indicators">
+                  <li class="active"></li>
+                  <li></li>
+                  <li></li>
+                </ol>
                 <div class="carousel-inner">
                   <div class="item active">
                     <img src="assets/img/bootstrap-mdo-sfmoma-01.jpg" alt="">