timestamp转2000-02-23 09:58:00 时间戳

function format(timestamp) {                var time = new Date(timestamp);                var year = time.getFullYear();                var month = (time.getMonth() + 1) > 9 && (time.getMonth() + 1) || ('0' + (time.getMonth() + 1))                var date = time.getDate() > 9 && time.getDate() || ('0' + time.getDate())                var hour = time.getHours() > 9 && time.getHours() || ('0' + time.getHours())                var minute = time.getMinutes() > 9 && time.getMinutes() || ('0' + time.getMinutes())                var second = time.getSeconds() > 9 && time.getSeconds() || ('0' + time.getSeconds())                var YmdHis = year + '-' + month + '-' + date +                    ' ' + hour + ':' + minute + ':' + second;                return YmdHis;            }