Suggestion for WP Plugin to accomplish this

Goodday everyone.

I just saw a new Internet Marketing WP Theme that has a really nice feature that I'd like to emulate - either through an existing WP Plugin or using jQuery and CSS or whatever it takes.

Take a look at this page: http://rzminc.com/rock/ - and click on the MAP tab at the top. Notice how the map slides down and "pushes" the header down when it slides in.

I've searched for a WP Plugin to do that, but I can't seem to find one. I'm pretty sure I can do it with a jQuery plugin and some CSS work. But, I'm asking here to see if anyone has any other ideas or some quickie solutions. I can use this immediately on a client's website.

Thanks.

James Dunn
Athens, GA USA