Vertical Drop Down Nav Bar

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I was wondering if there is a way to change the navigation setup when having it as a vertical nav bar on the left sidebar. I want to show sub pages when someone scrolls over the top of one of the page names if it has sub pages? so if there is HOME, ABOUT, PRODUCTS or something when they scroll over HOME it wont change but when they scroll over ABOUT it will expand and show CONTACT US, LOCATION or something like that. Is this possible to do within concrete and has anyone done this before?

 
c5studio replied on at Permalink Reply
c5studio
I believe that the Superfish Dropdown Menu add-on lets you make a vertical nav bar.