javascript 验证身份证

 /*身份证号码检索*/
 function cardCheck(cartNo) {
     if (cartNo.val() === "") {
         return false;
     }
     else if (cartNo.val().substring(0, 1) === " " || cartNo.val().substring(cartNo.val().length - 1, cartNo.val().length) === " ") {
         return false;
     }
     else if (/\w+\s+\w+/g.test(cartNo.val())) {
         return false;
     }
     else if (isCardNo(cartNo.val()) === false) {
         return false;
     }
     else if (checkProvince(cartNo.val()) === false) {
         return false;
     }
     else if (checkBirthday(cartNo.val()) === false) {
         return false;
     }
     else if (checkParity(cartNo.val()) === false) {
         return false;
     }
     return true;
 }

 /*身份证号码区号*/
 var vcity = {
     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"
 }

 /*检查号码是否符合规范，包括长度，类型*/
 function isCardNo(cartNo) {
     //身份证号码为15位或者18位，15位时全为数字，18位前17位为数字，最后一位是校验位，可能为数字或字符X
     var reg = /(^\d{15}$)|(^\d{17}(\d|X)$)|(^\d{15}$)|(^\d{17}(\d|x)$)/;
     if (reg.test(cartNo) === false) {
         return false;
     }
     return true;
 }

 /*取身份证前两位,校验省份*/
 function checkProvince(cartNo) {
     var province = cartNo.substr(0, 2);
     if (vcity[province] == undefined) {
         return false;
     }
     return true;
 }

 //检查生日是否正确*/
 function checkBirthday(cartNo) {
     var len = cartNo.length;
     /*身份证15位时，次序为省（3位）市（3位）年（2位）月（2位）日（2位）校验位（3位），皆为数字*/
     if (len === 15) {
         var re_fifteen = /^(\d{6})(\d{2})(\d{2})(\d{2})(\d{3})$/;
         var arr_data = cartNo.match(re_fifteen);
         var year = arr_data[2];
         var month = arr_data[3];
         var day = arr_data[4];
         var birthday = new Date('19' + year + '/' + month + '/' + day);
         return verifyBirthday('19' + year, month, day, birthday);
     }
     //身份证18位时，次序为省（3位）市（3位）年（4位）月（2位）日（2位）校验位（4位），校验位末尾可能为X*/
     if (len === 18) {
         var re_eighteen = null;
         if (cartNo.substring(17, 18) == "x") {
             re_eighteen = /^(\d{6})(\d{4})(\d{2})(\d{2})(\d{3})([0-9]|x)$/;
         }
         if (cartNo.substring(17, 18) == "X") {
             re_eighteen = /^(\d{6})(\d{4})(\d{2})(\d{2})(\d{3})([0-9]|X)$/;
         }
         if (cartNo.substring(17, 18) != "X" && cartNo.substring(17, 18) != "x") {
             re_eighteen = /^(\d{6})(\d{4})(\d{2})(\d{2})(\d{3})([0-9])$/;
         }
         var arr_data = cartNo.match(re_eighteen);
         var year = arr_data[2];
         var month = arr_data[3];
         var day = arr_data[4];
         var birthday = new Date(year + '/' + month + '/' + day);
         return verifyBirthday(year, month, day, birthday);
     }
     return false;
 }

 /*校验日期*/
 verifyBirthday = function (year, month, day, birthday) {
     var now = new Date();
     var now_year = now.getFullYear();
     //年月日是否合理*/
     if (birthday.getFullYear() == year && (birthday.getMonth() + 1) == month && birthday.getDate() == day) {
         //判断年份的范围（3岁到100岁之间)*/
         var time = now_year - year;
         if (time >= 3 && time <= 100) {
             return true;
         }
         return false;
     }
     return false;
 }

 /*校验位的检测*/
 function checkParity(cartNo) {
     //15位转18位*/
     cartNo = changeFivteenToEighteen(cartNo);
     if (cartNo.length === 18) {
         if (cartNo.substring(17, 18) === "x") {
             cartNo = cartNo.substring(0, 17) + "X";
         }
         var arrInt = new Array(7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2);
         var arrCh = new Array('1', '0', 'X', '9', '8', '7', '6', '5', '4', '3', '2');
         var cardTemp = 0, i, valnum;
         for (i = 0; i < 17; i++) {
             cardTemp += cartNo.substr(i, 1) * arrInt[i];
         }
         valnum = arrCh[cardTemp % 11];
         if (valnum === cartNo.substr(17, 1)) {
             return true;
         }
         return false;
     }
     return false;
 }

 /*15位转18位身份证号*/
 function changeFivteenToEighteen(cartNo) {
     if (cartNo.length === 15) {
         var arrInt = new Array(7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2);
         var arrCh = new Array('1', '0', 'X', 'x', '9', '8', '7', '6', '5', '4', '3', '2');
         var cardTemp = 0, i;
         cartNo = cartNo.substr(0, 6) + '19' + cartNo.substr(6, cartNo.length - 6);
         for (i = 0; i < 17; i++) {
             cardTemp += cartNo.substr(i, 1) * arrInt[i];
         }
         cartNo += arrCh[cardTemp % 11];
         return cartNo;
     }
     return cartNo;
 }