I mentioned earlier that there are two ways to use scripts in a given page. We talked about embedding the scripts into the page directly, now we'll look at using a source file instead.

Using a source file is very similar to embedding in that it starts with the <script> tags. However, rather than putting functions and scripts in between them, we'll call an external source file like this:

(note - the javascript source file does not require the <script> tags around them, as you are calling the file from within a <script> tag set.)

Let me quickly point out that I recommend using JS source files, for pretty much the same reasons as those for using a CSS file.