lastScrollY = 0;
function heartBeat()
{
    var diffY;
    if (document.documentElement && document.documentElement.scrollTop)
    { diffY = document.documentElement.scrollTop; }
    else if (document.body)
    { diffY = document.body.scrollTop; }
    percent = .1 * (diffY - lastScrollY);
    if (percent > 0)
    { percent = Math.ceil(percent); }
    else
    { percent = Math.floor(percent); }
    $("floatadl").style.top = parseInt($("floatadl").style.top) + percent + "px";
    $("floatadr").style.top = parseInt($("floatadr").style.top) + percent + "px";
    lastScrollY = lastScrollY + percent;
}
window.setInterval("heartBeat()",2);