function datetimecut (UTCDateString){
    if(!UTCDateString){
        return '-';
    }
    function formatFunc(str) {
        return str > 9 ? str : '0' + str
    }
    var date2 = new Date(UTCDateString);
    var year = date2.getFullYear();
    var mon = formatFunc(date2.getMonth() + 1);
    var day = formatFunc(date2.getDate());
    var hour = date2.getHours();
    
    var min = formatFunc(date2.getMinutes());
    var sec=formatFunc(date2.getSeconds());
    var dateStr = year+'-'+mon+'-'+day+' '+hour+':'+min+':'+sec;
    return dateStr;
};