This copies the navigation buttons from beneath Penny Arcade webcomics, and places a duplicate set to the left side of the screen, which scrolls as you move [previously shown above the adverts].
It helps when jumping from comic to comic, as the images can have variable sizes.

Geeky info:
There is also a commented out line for adverts to be removed from the site... commented because I'm too guilty to use it, as people do earn money from this... but some people may not mind as much, and I wouldn't want to restrict your choice.
Advert element chosen to insert before, because it was the first element on the page that I noticed directly before the webcomic, although 'comic' could also be used.