JS根据生日算年龄的方法
本文实例讲述了JS根据生日算年龄的方法。分享给大家供大家参考。具体实现方法如下：
functionparseDate(str){
if(str.match(/^\d{4}[\-\/\s+]\d{1,2}[\-\/\s+]\d{1,2}$/)){
returnnewDate(str.replace(/[\-\/\s+]/i,'/'));
}
elseif(str.match(/^\d{8}$/)){
returnnewDate(str.substring(0,4)+'/'+str.substring(4,6)+'/'+str.substring(6));
}
else{
return('时间转换发生错误！');
}
}
functionGetAgeByBrithday(birthday){
varage=-1;
vartoday=newDate();
vartodayYear=today.getFullYear();
vartodayMonth=today.getMonth()+1;
vartodayDay=today.getDate();
varbirthday=parseDate(birthday);
if(parseDate(birthday)!='时间转换发生错误！')
{
birthdayYear=birthday.getFullYear();
birthdayMonth=birthday.getMonth();
birthdayDay=birthday.getDate();
if(todayYear-birthdayYear<0)
{
alert("出生日期选择错误!");
}
else
{
if(todayMonth*1-birthdayMonth*1<0)
{
age=(todayYear*1-birthdayYear*1)-1;
}
else
{
if(todayDay-birthdayDay>=0)
{//alert(thisDay+'-'+brithd+"_ddd");
age=(todayYear*1-birthdayYear*1);
}
else
{
age=(todayYear*1-birthdayYear*1)-1;
}
}
}
returnage*1;
}
else
{
return-1;
}
}
希望本文所述对大家的javascript程序设计有所帮助。