javascript - Alternatives to window.scrollMaxY?

Question

I' trying to use window.pageYOffset & window.scrollMaxY to calculate the current page progress. This approach works under FF3.5 but under webkit window.scrollMaxY is undefined.

Answer 1

Alternative to window.scrollMaxY:

document.documentElement.scrollHeight - document.documentElement.clientHeight

gives same result as window.scrollMaxY with ie7, ie8, ff3.5, Safari 4, Opera 10, Google Chrome 3 under DOCTYPE XHTML 1.0 Transitional.