锘縧astScrollY = 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*/ }
    percent = 0.1 * (diffY - lastScrollY);
    if (percent > 0) percent = Math.ceil(percent);
    else percent = Math.floor(percent);

    $(".floatDrapes").each(function () {
        var oldtop = parseInt($(this).css("bottom"));
        $(this).css("bottom", (oldtop - percent) + "px");
    });
    lastScrollY = lastScrollY + percent;
    if (lastScrollY != 0)
        window.setTimeout("heartBeat()", 10);
}
//鍏抽棴鎸夐挳
function close_drapes(obj) {
    $(obj).parent().parent().hide();
}