JS实现根据出生年月计算年龄

复制代码代码如下:

<script language=javascript>

function ages(str)

{

var r = str.match(/^(/d{1,4})(-|//)(/d{1,2})/2(/d{1,2})$/);

if(r==null)return false;

var d= new Date(r[1], r[3]-1, r[4]);

if (d.getFullYear()==r[1]&&(d.getMonth()+1)==r[3]&&d.getDate()==r[4])

{

var Y = new Date().getFullYear();

return("年龄 = "+ (Y-r[1]) +" 周岁");

}

return("输入的日期格式错误！");

}

alert(ages("1980-03-22"));

alert(ages("2002-01-31"));

alert(ages("2002-01-41"));

</script>