For our external files they reside in my public folder and contain the standard Lorem Ipsum text for this demo. Here is the 'live' example of how this would work. Click on the links below to see the demo.
Link One | Link Two | Link Three
Clicking on the links will summon the different content without having to refresh the page. This saves on load time and at the same time allows you to designate a specific area for as much content as you'd like to cycle through instead of having a new page for each one.