IT工程師數位筆記本

//身份證省的編碼
var vcity = {
    11: "北京", 12: "天津", 13: "河北", 14: "山西", 15: "內蒙古",
    21: "遼寧", 22: "吉林", 23: "黑龍江", 31: "上海", 32: "江蘇",
    33: "浙江", 34: "安徽", 35: "福建", 36: "江西", 37: "山東", 41: "河南",
    42: "湖北", 43: "湖南", 44: "廣東", 45: "廣西", 46: "海南", 50: "重慶",
    51: "四川", 52: "貴州", 53: "云南", 54: "西藏", 61: "陜西", 62: "甘肅",
    63: "青海", 64: "寧夏", 65: "新疆", 71: "臺灣", 81: "香港", 82: "澳門", 91: "國外"
};
//檢查號碼是否符合規范，包括長度，類型
function isCardNo(card) {
    //身份證號碼為15位或者18位，15位時全為數字，18位前17位為數字，最后一位是校驗位，可能為數字或字符X
    var reg = /(^\d{15}$)|(^\d{17}(\d|X)$)/;
    if (reg.test(card) === false) {
        //alert("demo");
        return false;
    }
    return true;
}

//取身份證前兩位,校驗省份
function checkProvince(card) {
    var province = card.substr(0, 2);
    if (vcity[province] == undefined) {
        return false;
    }
    return true;
}

//檢查生日是否正確
function checkBirthday(card) {
    var len = card.length;
    //身份證15位時，次序為省（3位）市（3位）年（2位）月（2位）日（2位）校驗位（3位），皆為數字
    if (len == '15') {
        var re_fifteen = /^(\d{6})(\d{2})(\d{2})(\d{2})(\d{3})$/;
        var arr_data = card.match(re_fifteen);
        var year = arr_data[2];
        var month = arr_data[3];
        var day = arr_data[4];
        var birthday = new Date('19' + year + '/' + month + '/' + day);
        return verifyBirthday('19' + year, month, day, birthday);
    }
    //身份證18位時，次序為省（3位）市（3位）年（4位）月（2位）日（2位）校驗位（4位），校驗位末尾可能為X
    if (len == '18') {
        var re_eighteen = /^(\d{6})(\d{4})(\d{2})(\d{2})(\d{3})([0-9]|X)$/;
        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;
}

//校驗日期
function verifyBirthday(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) {
        //判斷年份的范圍（3歲到100歲之間)
        var time = now_year - year;
        if (time >= 3 && time <= 100) {
            return true;
        }
        return false;
    }
    return false;
}

//校驗位的檢測
function checkParity(card) {
    //15位轉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位轉18位身份證號
function changeFivteenToEighteen(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;
}
function getBirthDay(card) {
    var len = card.length;
    //身份證15位時，次序為省（3位）市（3位）年（2位）月（2位）日（2位）校驗位（3位），皆為數字
    if (len == '15') {
        var re_fifteen = /^(\d{6})(\d{2})(\d{2})(\d{2})(\d{3})$/;
        var arr_data = card.match(re_fifteen);
        var year = arr_data[2];
        var month = arr_data[3];
        var day = arr_data[4];
        var birthday = '19' + year + '-' + month + '-' + day;
        return birthday;
    }
    //身份證18位時，次序為省（3位）市（3位）年（4位）月（2位）日（2位）校驗位（4位），校驗位末尾可能為X
    if (len == '18') {
        var re_eighteen = /^(\d{6})(\d{4})(\d{2})(\d{2})(\d{3})([0-9]|X)$/;
        var arr_data = card.match(re_eighteen);
        var year = arr_data[2];
        var month = arr_data[3];
        var day = arr_data[4];
        var birthday = year + '-' + month + '-' + day;
        return birthday;
    }
    return "";
}
//是否是身份證號碼
function IsIdcard(value) {
    var b = isCardNo(value) && checkProvince(value) && checkBirthday(value) && checkParity(value);
    return b;
}