"Share" Popup window on Amazon.com

How is the Share Window Done?

[RandallK]

Go to any product on Amazon.com. On the right side of the page there is a share button. Click it.

How do you think this is being done?

I love how clean it looks, I love that it isn't really a 'popup'. I love the beautiful translucent dropshadow.

Anyone know how it is done? Can anyone point me to some code that accomplishes a similar effect?

[LifeinAsia]

If you look at the source code for the page, you can see that it loads a number of external CSS files. If you want to see the "code" you can actually open up the CSS files directly from your browser.