This is a minibrowser/scroll bar.

Try scrolling by using the buttons.

This article has been encased in a minibrowser for educational use.

Minibrowsers are div style windows for browsing.

How to make one Edit

First, add <div style="width:(percent here); height:(xxx pixels); padding:10px; overflow:scroll; border:1px solid #000;">, then add your content, then close it with a </div>, and you're done!

See also Edit