link to js head converter code example
Example 1: include script in html
<script type="text/javascript" src="/path/to/script.js"></script>
Example 2: link javascript html
<script type="text/javascript" src="monscript.js"></script>
<script type="text/javascript" src="/path/to/script.js"></script>
<script type="text/javascript" src="monscript.js"></script>