根据身份证号码获取生日和性别

身份证号码里面的信息大有乾坤，以18位的身份证来说，前面六位代表了你户籍所在地，第七位到第十四位代表了你的出生年月，第十五位到第十七为代表了你的性别（偶数为女，奇数为男），根据这一信息，我在系统开发的录入员工的身份证后控件焦点转移时根据身份证号码获得生日和性别。
用C#写的代码如下：

Code
function checkId(pId){
//检查身份证号码
var arrVerifyCode = [1,0,"x",9,8,7,6,5,4,3,2];
var Wi = [7,9,10,5,8,4,2,1,6,3,7,9,10,5,8,4,2];
var Checker = [1,9,8,7,6,5,4,3,2,1,1];

if(pId.length != 15 && pId.length != 18) return "身份证号共有 15 码或18位";

var Ai=pId.length==18 ? pId.substring(0,17) : pId.slice(0,6)+"19"+pId.slice(6,16);

if (!/^\d+$/.test(Ai)) return "身份证除最后一位外，必须为数字！";

var yyyy=Ai.slice(6,10) , mm=Ai.slice(10,12)-1 , dd=Ai.slice(12,14);

var d=new Date(yyyy,mm,dd) , now=new Date();
var year=d.getFullYear() , mon=d.getMonth() , day=d.getDate();

if (year!=yyyy || mon!=mm || day!=dd || d>now || year<1940) return "身份证输入错误！";

for(var i=0,ret=0;i<17;i++) ret+=Ai.charAt(i)*Wi[i];
Ai+=arrVerifyCode[ret %=11];

return pId.length ==18 && pId != Ai?"身份证输入错误！":Ai;
};

<script language="javascript">
var id="342201570202003"

//根据身份证取 省份,生日，性别
function getInfo(id){
var arr=[null,null,null,null,null,null,null,null,null,null,null,"北京","天津","河北","山西","内蒙古"
,null,null,null,null,null,"辽宁","吉林","黑龙江",null,null,null,null,null,null,null,"上海"
,"江苏","浙江","安微","福建","江西","山东",null,null,null,"河南","湖北","湖南","广东","广西","海南"
,null,null,null,"重庆","四川","贵州","云南","西藏",null,null,null,null,null,null,"陕西","甘肃"
,"青海","宁夏","XJ",null,null,null,null,null,"台湾",null,null,null,null,null,null,null,null
,null,"香港","澳门",null,null,null,null,null,null,null,null,"国外"]
id=checkId(id)
if (isNaN(id)) return "错误的身份证号码"
var id=String(id), prov=arr[id.slice(0,2)] , sex=id.slice(14,17)%2? "男" : "女"
var birthday=(new Date(id.slice(6,10) , id.slice(10,12)-1 , id.slice(12,14))).toLocaleDateString()
return [prov,birthday,sex]
}

alert(getInfo(id))
</script>