This is add-html-to-page-with-js-include.html.
Here is the text without the include yet. Any text below this paragraph came from the include.
The include is really just an external js file but it functions as an include.
Put <script language="JavaScript" src="include.js"></script> in the head section since that is where it goes.
The text below is simply the text written to the page from the include.js file using document.write().