IE8 alternative to window.scrollY?

Question

I\'m trying to determine how many pixels down I\'ve scrolled using window.scrollY. But this isn\'t supported in IE8. What is the safe, cross-browser alternative

Answer 1

Based on Niels' answer, I come up with a slightly more compact solution when just the Y coord is needed:

function get_scroll_y() {
    return window.pageYOffset || document.body.scrollTop || document.html.scrollTop;
}