I plan to have two accordions on my site; one for an FAQ (possibly 1, 2 or 3 pages) and one for general navigation (available on every page).
For the FAQ I've found a Vertical slide-effect Mootools accordion which seems to suit that purpose really well.
For the navigation I figured I needed something based on the same Mootools version as the above (which is 1.1) so I searched and found the Moo.FX2 accordion.
I figured after some work on the CSS code I could get it to work in a similar way as my first accordion idea (which I'm abandoning as sharing the Mootools code for both seems like a better resource-efficient idea).
Finally I would like the navigation accordion to stay in the same place regardless of having scrolled down the page or not. Though not an accordion, here's a navigation menu which does just that (scroll down the page and see the navigation menu "bounce" back in place). I just don't want it to bounce quite as far and as much. A little "wiggling" up or down will do