Load javascript

I basically want to know if a greasemonkey script will do what I am wanting, if it's even possible. On McGraw-Hills site, Homework Manager, there are different options that the instructor can setup: 1) during your assignment you can click on a button, you can click on "how's it going" and it will show how you are doing on the assesment. Does not show what the correct answers, if you missed them, but it gives you your current grade. 2) after the assignment you can see what the students selection was and what the correct answer is. Not all of these assignments have these links. What I was wondering: is it possible to run the javascript on pages that don't have the link, either show all answers, or "how's it going" - can you add that functionality via greasemonkey?