How to know horizontal or vertical scroll bar is present or not in browser

This is work for all Browsers IE9, Chrome,Mozial, Windows Safari..

function IsScrollBarPresents() {
            window.scrollTo(1, 1);
           if (window.pageYOffset != 0) {
                alert("vertical scrollbar present");
            }
            if (window.pageXOffset != 0) {
                alert("horizontal scrollbar present");
            }
            window.scrollTo(0, 0);
        }

Thanks
Mahesh