这篇文章主要介绍了js根据生日算年龄的方法,涉及javascript操作时间的相关技巧,非常简单实用,需要的朋友可以参考下
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：
function parsedate(str){
if(str.match(/^\d{4}[\-\/\s+]\d{1,2}[\-\/\s+]\d{1,2}$/)){
return new date(str.replace(/[\-\/\s+]/i,'/'));
}
else if(str.match(/^\d{8}$/)){
return new date(str.substring(0,4)+'/'+str.substring(4,6)+'/'+str.substring(6));
}
else{
return ('时间转换发生错误！');
}
}
function getagebybrithday(birthday){
var age=-1;
var today=new date();
var todayyear=today.getfullyear();
var todaymonth=today.getmonth()+1;
var todayday=today.getdate();
var birthday=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;
}
}
}
return age*1;
}
else
{
return -1;
}
}
以上就是js怎么根据生日算年龄实例详解的详细内容。