how to include javascript file code example

Example 1: include script in html

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

Example 2: how to link javascript to html

<script src="PathToYourFile.js"> </script>

Example 3: include other js files in a js file

document.writeln("<script type='text/javascript' src='Script1.js'></script>");
document.writeln("<script type='text/javascript' src='Script2.js'></script>");