Keyboard shortcut for your bookmarks bar

A great new tip I just discovered last week: using your keyboard to open a bookmarked website from your bookmark bar in Safari. You can easily open a bookmarked website that is in your bookmark bar with "Command-1", "Command-2", "Command-3"... (The number corresponding to the bookmark you want to open). This works amazingly well, except for one thing, it doesn't work with bookmarks folder.