js-获取滚动条位置

function ScollPostion() {
    var t, l, w, h;
    if (document.documentElement && document.documentElement.scrollTop) {
        t = document.documentElement.scrollTop;
        l = document.documentElement.scrollLeft;
        w = document.documentElement.scrollWidth;
        h = document.documentElement.scrollHeight;
    } else if (document.body) {
        t = document.body.scrollTop;
        l = document.body.scrollLeft;
        w = document.body.scrollWidth;
        h = document.body.scrollHeight;
    }
    return {
        top: t,
        left: l,
        width: w,
        height: h
    };
}

js-获取滚动条位置

原文：http://www.cnblogs.com/ban-s/p/js-scroll-coordinate.html