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;
}