How does this site slide its newsletter+ from the top?

[orang3]

Trying to figure out how this site makes their newsletter+ button makes the page slide down:http://thestoryoftelling.com/ (click on "newsletter+")It looks like the #wrap element has the page offset by 57px and it's background url effectively becomes the background for the signup link after "sliding" in. Clicking on "newsletter+" calls a "_gaq" function, but that seems to be more for tracking.I'm thinking it's activated via superfish, but I don't understand how or where this gets called from:\[code\]jQuery(document).ready(function($) { $('#header .menu, .superfish').superfish({ delay: 100, // 0.1 second delay on mouseout animation: {opacity:'show',height:'show'}, // fade-in and slide-down animation dropShadows: false // disable drop shadows });});\[/code\]Any ideas out there? Probably a jquery thing.