How Hard is it to Re-Create This Navigation?

Hi I really like the horizontal navigation that Piwik analytics uses, see their live demo with nav bar here: http://demo.piwik.org/index.php?module=CoreHome&action=index&idSite=7&period=day&date=yesterday#module=Dashboard&action=embeddedIndex&idSite=7&period=day&date=yesterday&idDashboard=1

I want to re-create that navigation for my own website. The problem though is that my JS is very rusty. So I was wondering…
How hard is it to re-create a menu like that, would it be pretty simple with some jquery and basic JS knowledge? My programming knowledge is good (php), just not very experienced with JS.

I was thinking of maybe hiring someone at freelancer.com, but if it’s easy I prefer to do it myself, maybe with some help, so I know for sure the code is clean and not spaghetti chaos.

Anyone can help?

I think you can actually recreate the tab navigation using nothing but CSS, Paul O’B could confirm that.

Finally found an example of what I was referring to
http://www.cssnewbie.com/example/css-dropdown-menu/horizontal.html

Thanks cp radio, will use that example as a reference when building it