【JavaScript】js验证身份证号码

以下为验证身份证号码的js代码，调用方式为：

checktheform（cardid）调用返回布尔类型结果。

//TODO
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"
};

checktheform = function(cardid) {

    //var card = document.getElementById(cardid).value;
    var card = cardid;
    //是否为空
    if (card === '') {
        //alert('请输入身份证号，身份证号不能为空');
        //document.getElementById(cardid).focus;
        return false;
    }
    //校验长度，类型
    if (isCardNo(card) === false) {
        //alert('您输入的身份证号码不正确，请重新输入');
        //document.getElementById(cardid).focus;
        return false;
    }
    //检查省份
    if (checkProvince(card) === false) {
        //alert('您输入的身份证号码不正确,请重新输入');
        //document.getElementById(cardid).focus;
        return false;
    }
    //校验生日
    if (checkBirthday(card) === false) {
        //alert('您输入的身份证号码生日不正确,请重新输入');
        //document.getElementById(cardid).focus();
        return false;
    }
    //检验位的检测
    if (checkParity(card) === false) {
        //alert('您的身份证校验位不正确,请重新输入');
        //document.getElementById(cardid).focus();
        return false;
    }
    return true;
};

//检查号码是否符合规范，包括长度，类型
isCardNo = function(card) {
    //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}$)|(^\d{17}(\d|X)$)/;
    if (reg.test(card) === false) {
        return false;
    }

    return true;
};

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

//检查生日是否正确
checkBirthday = function(card) {
    var len = card.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})$/;
        var arr_data = card.match(re_fifteen);
        var year = arr_data[2];
        var month = arr_data[3];
        var day = arr_data[4];
        var birthday = new Date('19' + year + '/' + month + '/' + day);
        return verifyBirthday('19' + year, month, day, birthday);
    }
    //身份证18位时，次序为省（3位）市（3位）年（4位）月（2位）日（2位）校验位（4位），校验位末尾可能为X
    if (len == '18') {
        var re_eighteen = /^(\d{6})(\d{4})(\d{2})(\d{2})(\d{3})([0-9]|X)$/;
        var arr_data = card.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
checkParity = function(card) {
    //15位转18位
    card = changeFivteenToEighteen(card);
    var len = card.length;
    if (len == '18') {
        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 += card.substr(i, 1) * arrInt[i];
        }
        valnum = arrCh[cardTemp % 11];
        if (valnum == card.substr(17, 1)) {
            return true;
        }
        return false;
    }
    return false;
};

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