"Hover Bar"

I need some examples of a "hovering navigation bar." Sort of hard to explain but I would like to split up my site into three different categories, each with its own unique design. I need a nonobtrusive bar running along the top of the page that can redirect the user back to the main "splash" type page where he or she can choose a different category. Anyone know of any examples or websites that use them? Thanks

 

you mean just a navigation bar at the top of the page? i think tons of sites use that :|

 

Not necessarily. Sort of like a "floating navigation bar" think blogspot blogs top thing.