JS校验身份证号码

 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 CheckIDCard(card) {
            //是否为空  
            if (card === ‘‘) {
                alert(‘请输入身份证号，身份证号不能为空‘);
                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‘);
                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‘);
                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‘);
                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‘);
                return false;
            }
            alert(‘OK‘);
            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;
        }