You will need to install a user script manager extension to install this script.
=== ID Navigation
Depicted above are:
ID Navigation Descending
ID Navigation Ascending
Normal Mode with an ID tag in the search.
And since this site is currently removing the "src" from my images, here's a link to the above image: http://theimagehost.net/upload/73834f1a9dff28ade0044e005419acae.png