想把当前的时间向前推三个月，日期格式的，要求有时分秒，用JavaScript实现，怎么实现？谢谢！

Question

想把当前的时间向前推三个月，日期格式的，要求有时分秒，用JavaScript实现，怎么实现？谢谢！

Answer 1

[code="java"]
function get3MonthBefor(){

var resultDate,year,month,date,hms;
var currDate = new Date();
year = currDate.getFullYear();
month = currDate.getMonth()+1;
date = currDate.getDate();
hms = currDate.getHours() + ':' + currDate.getMinutes() + ':' + (currDate.getSeconds() < 10 ? '0'+currDate.getSeconds() : currDate.getSeconds());
switch(month)
{
case 1:
case 2:
case 3:
month += 9;
year--;
break;
default:
month -= 3;
break;
}
month = (month < 10) ? ('0' + month) : month;

   resultDate = year + '-'+month+'-'+date+' ' + hms;
return resultDate;

}
[/code]