[JavaScript]YYYY-MM-DD格式字符串计算年龄

function getAge(birth){    birth = birth.replace(/-/g,"/"); //把格式中的"-"替换为"/"    birth = new Date(birth ); //替换后转为Date类型    var now = new Date(); //获取当前日期    var nowYear=now.getFullYear(); //当前日期的年份    var nowMonth=now.getMonth();    var nowDay=now.getDay();    var birthYear=birth.getFullYear();    var birthMonth=birth.getMonth();    var birthDay=birth.getDay(); //出生日期的日数    var age;        if(birth>now){        return false;    }    else if(nowYear==birthYear||(nowYear>birthYear&&nowMonth>=birthMonth&&nowDay>=birthDay)){        age=nowYear-birthYear;        }else {            age=nowYear-birthYear-1; //简而言之，没过生日岁数不能+1        }    return age;    }

另一种实现方式比较简单：

function getAge(tmpStr){        var nowdate = new Date();//今天        var birth = new Date(tmpStr.replace(/-/g,"/"));//默认格式出生日期        var age = ((nowdate-tmpStr)/1000/60/60/24/365);//计算年龄;        return age;}