Scrolling To The Bottom Of The Window...

The issue seems to be that when the buffer becomes extremely large instead of scrolling to the bottom of the window, there is a gap at the bottom instead.

Here is the test code I've been using, and it allows me to get to around 18000 pixels before the gap begins...

window.scrollTo(0, Math.max(document.documentElement.offsetHeight,
document.body.scrollHeight
) +
(window.innerHeight ||
document.body.clientHeight
) + 100);
window.scrollBy(0, Math.max(document.documentElement.offsetHeight,
document.body.scrollHeight
) +
(window.innerHeight ||
document.body.clientHeight
) + 100);
The issue is really driving me crazy, hopefully someone will be able to help me out.

Please do not suggest putting a link at the bottom of the content (IE: <a name="bottom">asdf</a>, url#name) for this is not an option.