Could some edit this code to function for vertical scrolling?

Hello,

I am a know nothing.

Read this discussion ... http://forums.adobe.com/message/5501696.

Ume YOSHIOKA provided code to control animation playback direction by scroll direction.

It is for horizontal scroll only.

His example of it in action ... http://ciruelo.jp/js/edge/ws/windowScroll.html

Very clever.

Could some edit this code to function for vertical scrolling?

I am a know nothing and do not know if I am asking too much.

My attempts were failures.

Code is

var totalFrame = 6250;
var stageWidth = 10000;
var maxScrollLeft = stageWidth - $(window).width();
var baseFrame = 250;  //for adjustment



//control the main timeline pos by $(window).scrollLeft() pos.
$(window).scroll(function (e) {
  var scrollLeft = $(window).scrollLeft();              // get scroll pos
  var n = totalFrame*scrollLeft/maxScrollLeft|0;        // calc frame index
  sym.stop(n+baseFrame*(1-scrollLeft/maxScrollLeft)|0); // adjustment & move frame
});

thank you