How to get and set the current web page scroll position?

Question

How can I get and set the current web page scroll position?

I have a long form which needs to be refreshed based on user actions/input. When this happens, the page

Answer 1

There are some inconsistencies in how browsers expose the current window scrolling coordinates. Google Chrome on Mac and iOS seems to always return 0 when using document.documentElement.scrollTop or jQuery's $(window).scrollTop().

However, it works consistently with:

// horizontal scrolling amount
window.pageXOffset

// vertical scrolling amount
window.pageYOffset