XF 1.5 Achieving a Hover Header Effect

Hello! I'm interested in achieving an effect much like the one this site has here:

When you mouse over the header, it has multiple tabs appear, though I suggest you click the link to get a better idea of what I'm talking about. I've been playing around with codes which have no effect, so I'm here to ask: is this even possible? How would I go about implementing this, and is there a specific code that could use? Which template should I put it in? Thank you!

Here is a link to my site: www.aeriverse.com. However, I won't be using the hover header on our current skin.
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