jQuery根据出生年月日得到年龄实现代码

本文主要和大家分享jquery 根据出生年月日得到年龄，希望能帮助到大家。

jquery 根据出生年月日得到年龄

function byage(strBirthday ){

    var returnAge;
    var strBirthdayArr=strBirthday.split("-");
    var birthYear = strBirthdayArr[0];
    var birthMonth = strBirthdayArr[1];
    var birthDay = strBirthdayArr[2];

    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
}

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