panel bar
The Panel Bar, sometimes called the accordion can be configured horizontally or vertically, to dyanmically load data and very importantly to asynchronously load - to load when you expand the panel. This decreases the time on the initial load and increases the responsiveness of the web page. In this sample, I load pictures asynchrounously into the panels.
Telerik's extensions use consistent API so once you have learned one, the balance is easy.
