The code between the start and end copy is iframe.
Iframe will allow that page to show our site but in a way that it fits the look of your site.
You can change the iframe width and height as you need to.
Video (COMING SOON)
Facebook (COMING SOON)
MySpace (COMING SOON)
Click Here [1] for an example of a CMS called Drupal using it.
Links:
[1] http://www.rivervalleytechcollective.org/node/399