js時間戳轉換日期格式

formatDate:function(secs){ //123456789 --> 年-月-日 時：分：秒
     var t = new Date(secs)
     var year = t.getFullYear()
     var month = t.getMonth() + 1
     if(month < 10){month = '0' + month}
     var date = t.getDate()
     if(date < 10){date = '0' + date}
     var hour = t.getHours()
     if(hour < 10){hour = '0' + hour}
     var minute = t.getMinutes()
     if(minute < 10){minute = '0' + minute}
     var second = t.getSeconds()
     if(second < 10){second = '0' + second}
     return year+'-'+month+'-'+date+' '+hour+':'+minute+':'+second
},