JS计算两日期之间相差的月份

function getMonthNumber(date1, date2) {
            //默认格式为"20030303",根据自己需要改格式和方法
            var year1 = date1.substr(0, 4);
            var year2 = date2.substr(0, 4);
            var month1 = date1.substr(4, 2);
            var month2 = date2.substr(4, 2);
            var len = (year2 - year1) * 12 + (month2 - month1);

            var day = date2.substr(6, 2) - date1.substr(6, 2);
            if (day > 0) {
                len += 1;
            }
            else if (day < 0)
            {
                len -= 1;
            }
            return len;
        }




获取当前的日期时间 格式“yyyy-MM-dd HH:MM:SS”

function getNowFormatDate() {
    var date = new Date();
    var seperator1 = "-";
    var seperator2 = ":";
    var month = date.getMonth() + 1;
    var strDate = date.getDate();
    if (month >= 1 && month <= 9) {
        month = "0" + month;
    }
    if (strDate >= 0 && strDate <= 9) {
        strDate = "0" + strDate;
    }
    var currentdate = date.getFullYear() + seperator1 + month + seperator1 + strDate
            + " " + date.getHours() + seperator2 + date.getMinutes()
            + seperator2 + date.getSeconds();
    return currentdate;
}