function pageTop() {
    var sc1 = sc2 = sc3 = 0;
    if (document.documentElement) {
    sc1 = document.documentElement.scrollTop || 0;
    }
    if (document.body) {
    sc2 = document.body.scrollTop || 0;
    }
    sc3 = window.scrollY || 0;
    var sc = Math.max(sc1, Math.max(sc2, sc3));
    window.scrollTo(0, Math.floor(sc / 2.1));
    if (sc > 0) {
    window.setTimeout("pageTop()", 10);
    }
}