// 时间戳转化
function formatDate(now) {
    var year=now.getFullYear();
    var month=now.getMonth()+1;
    var date=now.getDate();
    var hour=now.getHours();
    var minute=now.getMinutes();
    var second=now.getSeconds();

    return year+"-"+month+"-"+date+" "+hour+":"+minute+":"+second;
}