$(document).ready(function(){
    var olympicbegin = new date(2022, 1, 5, 0, 0, 0, 0);
    var today = new date();
    var dis = olympicbegin.gettime() - today.gettime();
    var count = (today.gettime() >= olympicbegin.gettime()) ? 0 : math.floor(dis / (1000 * 3600 * 24));
    $(".fixed .image span").text("倒计时" + count + "天");
});