jQuery正则验证15/18身份证

最好的jQuery正则验证身份证代码:
按照身份证的算法定制而成,精确度完美支持15和18位. 错一个数字或字母都通不过,无需通过数据处理来验证

//身份证检验
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"
};

function checkCard(card){
    //是否为空
    if(!card||!isCardNo(card)||!checkProvince(card)||!checkBirthday(card)||!checkParity(card)){
        ZlyJs.divTip("请输入正确的身份证号码");
        jQuery(".sf_list").focus();
        return false;
    }
    return true;
};


//检查号码是否符合规范，包括长度，类型
function isCardNo(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
function checkProvince(card){
    var province = card.substr(0,2);
    if(vcity[province] == undefined) {
        return false;
    }
    return true;
};

//检查生日是否正确
function checkBirthday(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
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(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
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("请输入正确的身份证号码");
    return false;
}

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