lastScrollY = 0;
function heartBeat() {
    var diffY;
    if (document.documentElement && document.documentElement.scrollTop)
        diffY = document.documentElement.scrollTop;
    else if (document.body)
        diffY = document.body.scrollTop
    else
    { /*Netscape stuff*/ }

    //alert(diffY);
    percent = .1 * (diffY - lastScrollY);
    if (percent > 0) percent = Math.ceil(percent);
    else percent = Math.floor(percent);
    document.getElementById("lovexin12").style.top = parseInt(document.getElementById("lovexin12").style.top) + percent + "px";

    lastScrollY = lastScrollY + percent;
    //alert(lastScrollY);
}

window.setInterval("heartBeat()", 1);

function far_close() {
    document.getElementById("lovexin12").innerHTML = "";
}