use cdn in html code example

Example 1: add cdn html

<!--In-between you head tags put:-->
 <script src="SOURCE URL HERE"></script>
<!--For easy copy/paste:-->
 <script src=""></script>

Example 2: css cdn

<script src="//ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>
<script src="//netdna.bootstrapcdn.com/bootstrap/3.1.1/js/bootstrap.min.js"></script>
<link rel="stylesheet" type="text/css" href="//netdna.bootstrapcdn.com/bootstrap/3.1.1/css/bootstrap.min.css">