身份证号规则及校验

// 省份编号
var aCity={11:"北京",12:"天津",13:"河北",14:"山西",15:"内蒙古",21:"辽宁",22:"吉林",23:"黑龙江 ",31:"上海",32:"江苏",33:"浙江",34:"安徽",35:"福建",36:"江西",37:"山东",41:"河南",42:"湖北 ",43:"湖南",44:"广东",45:"广西",46:"海南",50:"重庆",51:"四川",52:"贵州",53:"云南",54:"西藏 ",61:"陕西",62:"甘肃",63:"青海",64:"宁夏",65:"新疆",71:"台湾",81:"香港",82:"澳门",91:"国外 "}; 
// 验证身份证号，成功则返回省份编号+出生日期+性别
function cidInfo(sId){ 
var iSum=0;
if(!/^\d{17}(\d|x)$/i.test(sId))return -1; 
sId=sId.replace(/x$/i,"a"); 
if(aCity[parseInt(sId.substr(0,2))]==null) return -2;//return "Error:非法地区";
birthday = ""+sId.substr(6,4)+Number(sId.substr(10,2))+Number(sId.substr(12,2));
sBirthday=sId.substr(6,4)+"-"+Number(sId.substr(10,2))+"-"+Number(sId.substr(12,2)); 
var d=new Date(sBirthday.replace(/-/g,"/")); 
if(sBirthday!=(d.getFullYear()+"-"+ (d.getMonth()+1) + "-" + d.getDate())) return -3;//return "Error:非法生日"; 
for(var i = 17;i>=0;i --) iSum += (Math.pow(2,i) % 11) * parseInt(sId.charAt(17 - i),11);
if(iSum%11!=1) return -4; //return "Error:非法证号"; 
return ""+parseInt(sId.substr(0,2))+birthday+(sId.substr(16,1)%2?1:2); //"男":"女"); 
}

http://jingyan.baidu.com/article/22a299b525f9cd9e18376a58.html

http://baike.baidu.com/link?url=EfPjzVve_FHOewwpqOyF3f7D9PqYL0kX8GnS4TYMSf1rkjPkjFpfbz4ACI-WAx4PWqNrc4InaX3dJ2BiMqfP2a