function myFormatDate(timeStr, length) {
var newDate = new Date(timeStr * 1000);
var year = newDate.getFullYear();
var month = newDate.getMonth()+1;
var day = newDate.getDate();
var hour = newDate.getHours();
var minute = newDate.getMinutes();
var second = newDate.getSeconds();
if(month<10){
month = '0'+month;
}
if(day<10){
day = '0'+day;
}
if(hour<10){
hour = '0'+hour;
}
if(length==6){
return year+"-"+month;
}
else if(length == 10){
return year+"-"+month+"-"+day;
}
else if(length == 16){
return year+"-"+month+"-"+day+" "+hour+":"+minute+":"+second;
}
}