<script type="text/javascript" src="yourfile.js"></script>
<script type="text/javascript" src="/path/to/script.js"></script>
<script src="index.js"></script>
<html> <head> <script type="text/javascript" src="/path/to/script.js"></script> ...
<script type="text/javascript" src="path-to-javascript-file.js"></script>
<script src="PathToYourFile.js"> </script>
<script src="myscripts.js"></script>
<script src="Your-JavaScript-File.js"></script> <!--If JS file is in same folder with HTML file-->
<script src="myScript.js"></script>
<script> // JS Here </script>