Does not scroll overflow parent other than body

[jsgoupil]

setScrollTop(this.body);
setScrollTop(this.document.documentElement);
setScrollTop(this.document.body.parentNode);

This is clever, however, it does not work if my container is not the body.
My app is basically "left menu"/"content page"... the content page will scroll, the body will never scroll.

It is quite complicated to find out which container(s) should scroll, so there should be a parameter to be set.