获取时间 和本地时间对比

// 计算年龄 获取时间 和本地时间对比
function jsGetAge(strBirthday){
var returnAge;
var strBirthdayArr=strBirthday.split("-");
var birthYear = strBirthdayArr[0];
var birthMonth = strBirthdayArr[1];
var birthDay = strBirthdayArr[2];

var d = new Date();
var nowYear = d.getFullYear();
var nowMonth = d.getMonth() + 1;
var nowDay = d.getDate();

if(nowYear == birthYear){
returnAge = 0;//同年 则为0岁
}
else{
var ageDiff = nowYear - birthYear ; //年之差
if(ageDiff > 0){
if(nowMonth == birthMonth){
var dayDiff = nowDay - birthDay;//日之差
if(dayDiff < 0){ returnAge = ageDiff - 1; }
else{ returnAge = ageDiff ; }
}
else{
var monthDiff = nowMonth - birthMonth;//月之差
if(monthDiff < 0){ returnAge = ageDiff - 1; }
else{ returnAge = ageDiff ; }
}
}
else{
returnAge = -1;//返回-1 表示出生日期输入错误 晚于今天
}
}
return returnAge;//返回周岁年龄
}