How to stop window jumping when typing in autoresizing textarea

Question

I am using the accepted answer to this question to build a textarea that expands vertically as text overflows:

Answer 1

Save the scrollLeft, scrollTop values, and then restore them after resizing the textarea:

function resize () {
   var scrollLeft = window.pageXOffset ||
   (document.documentElement || document.body.parentNode || document.body).scrollLeft;

   var scrollTop  = window.pageYOffset ||
   (document.documentElement || document.body.parentNode || document.body).scrollTop;

   text.style.height = "auto";
   text.style.height = text.scrollHeight + 'px';

   window.scrollTo(scrollLeft, scrollTop);
}

JSFiddle: http://jsfiddle.net/losnir/nnkeH/1