add js from html code example

Example 1: include script in html

<script type="text/javascript" src="/path/to/script.js"></script>

Example 2: call js script in html

<script src="file1.js" type="text/javascript"></script> 
<script src="file2.js" type="text/javascript"></script>

Example 3: include javascript in html

<script>
	// JS Here  
</script>