function timestampToTime(timestamp) {
    var date = new Date(timestamp);//時間戳為10位需*1000，時間戳為13位的話不需乘1000
    var Y = date.getFullYear() + '/';
    var M = (date.getMonth()+1 < 10 ? '0'+(date.getMonth()+1) : date.getMonth()+1) + '/';
    var D = date.getDate() + ' ';
    var h = date.getHours() + ':';
    var m = date.getMinutes() + ':';
    var s = date.getSeconds();
    return Y+M+D+" "+h+m+s;
}