Milonic JavaScript Menu

That worked as far as positioning relative to the right-hand-side of my window, but it now it acts as if the "followscroll" has been set to "followscroll=1;". No matter what I set this value to, it acts the same. Any suggestions?

Is it possible to position a menu relative to the right-hand-side of the window? I want to be able to specify an offset from the right edge. The example of the right-opening menu isn't quite what I need - that one uses a large offset from the left edge of the window.