Does anyone know how espn.com is getting the drop shadow effects on their redesigned front page (http://espn.go.com/main.html)?

There's a drop shadow on the right side of the middle content column, as well as under the main ESPN logo at the top of the page. There is also a drop shadow under the "Top Story" headline text.

I was wondering if this is CSS or images, and if it is CSS, how it is done.

Any input is appreciated.

Thanks!