function timestampToTime(val) {
    var val = new Date(val)
        var year = val.getFullYear();
        var month = (val.getMonth()+1 < 10 ? '0'+(val.getMonth()+1) : val.getMonth()+1);
        var date = (val.getDate() < 10 ? '0'+(val.getDate()) : val.getDate());
        var hour = (val.getHours() < 10 ? '0'+(val.getHours()) : val.getHours());
        
 
var minute = (val.getMinutes() < 10 ? '0'+(val.getMinutes()) : val.getMinutes());
        var second = (val.getSeconds() < 10 ? '0'+(val.getSeconds()) : val.getSeconds());
        return year+'-'+month+'-'+date+' '+hour+':'+minute+':'+second;
}

日期格式化函式。不夠補零。