External javascript files...

I kind of ignored my work today and learned more about Javascript and the like.

A key learning point:
Making and calling external Javascript files.
Sometimes this is useful although I don't know how wise it is.

From here, I found out how to do it:

• put the script into a separate file with the file name, example.js
• make sure the file begins with 
• <!--     
• and ends with
•   -->
• Within the html file this is how to call the script:
• <script src="example.js">
• </script>
• The location of the script is important and the src bit describes the location.