Hi guys i need to build, a menu that is similar to the porsche website menu. here is the link. http://imp.porsche.com/belgium/fr/

its a vertical, tree menu, but at the end of last menu item a page descriptions opens. If someone can point out to me how its done, it will be very helpful, thanks guys

That's just a fly-out menu. You can do it with CSS, lots of methods here:
http://www.cssplay.co.uk/menus/