Show/hide login box - how did they do this?

[froglegs]

Check out the show/hide login (in orange) in upper right corner on Wall Street Journal (http://online.wsj.com/public/us) site.

How did they do this? Any scripts or tutorials come to mind?

Thanks

[bluewalrus]

its a toggle.
http://www.tjkdesign.com/articles/toggle_elements.asp