Well, I of course knew what the e
is, but I don't see why he needs it for that code.
Why does he need to reference the triggering event when the code just does (now, as simplified):
var scrollPosition = document.body.scrollTop; // initial value
scrollPosition = document.body.scrollTop;
That's what *I* meant by "why is e
there?" I don't see it being used, at all.