jQuery正則驗證15/18身份證

最好的jQuery正則驗證身份證程式碼:
按照身份證的演算法定製而成,精確度完美支援15和18位. 錯一個數字或字母都通不過,無需通過資料處理來驗證

//身份證檢驗
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:"雲南",54:"西藏",61:"陝西",62:"甘肅",
    63:"青海",64:"寧夏",65:"新疆",71:"臺灣",81:"香港",82:"澳門",91:"國外"
};

function checkCard(card){
    //是否為空
    if(!card||!isCardNo(card)||!checkProvince(card)||!checkBirthday(card)||!checkParity(card)){
        ZlyJs.divTip("請輸入正確的身份證號碼");
        jQuery(".sf_list").focus();
        return false;
    }
    return true;
};


//檢查號碼是否符合規範，包括長度，型別
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，最後一位是校驗位，可能為數字或字元X
    var reg = /(^\d{15}$)|(^\d{17}(\d|X)$)/;
    if(reg.test(card) === false){
        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){
        //判斷年份的範圍（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;
};

if (!checkCard(code)) {
    alert("請輸入正確的身份證號碼");
    return false;
}

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