how to add javascript to hmtl code example
Example 1: include script in html
<script type="text/javascript" src="/path/to/script.js"></script>
Example 2: insert js in html
<script src=¨script.js¨></script>
<script type="text/javascript" src="/path/to/script.js"></script>
<script src=¨script.js¨></script>