//漂浮客服开始
lastScrollY = 0;
function customer_support() {
    var diffY;
    if (document.documentElement && document.documentElement.scrollTop)
        diffY = document.documentElement.scrollTop;
    else if (document.body)
        diffY = document.body.scrollTop
    else { }
    percent = .1 * (diffY - lastScrollY);
    if (percent > 0)
        percent = Math.ceil(percent);
    else
        percent = Math.floor(percent);
    document.getElementById("customer_support").style.top = parseInt(document.getElementById("customer_support").style.top) + percent + "px";
    lastScrollY = lastScrollY + percent;
}
window.setInterval("customer_support()", 1);
function close_customer_support() {
    document.getElementById("customer_support").style.visibility = 'hidden';
}

//漂浮客服结束