身份证号码校验

function validIDCardNo(val) {// 检查身份证号码格式（15位或18位）var isCardNo = function (val) {return /(^\d{15}$)|(^\d{17}(\d|X)$)/.test(val);};// 将15位身份证号码转换为18位var changeFifteenToEighteen = function (card) {if (card.length === 15) {var arrInt = [7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2];var arrCh = ['1', '0', 'X', '9', '8', '7', '6', '5', '4', '3', '2'];var cardTemp = 0;card = card.substr(0, 6) + '19' + card.substr(6);for (var i = 0; i < 17; i++) {cardTemp += card[i] * arrInt[i];}card += arrCh[cardTemp % 11];return card;}return card;};// 校验出生日期码是否合法var checkDate = function (val) {var pattern = /^(18|19|20)\d{2}((0[1-9])|(1[0-2]))(([0-2][1-9])|10|20|30|31)$/;if (pattern.test(val)) {var year = val.substring(0, 4);var month = val.substring(4, 6);var date = val.substring(6, 8);var date2 = new Date(year + '-' + month + '-' + date);return date2 && date2.getMonth() === parseInt(month, 10) - 1;}return false;};// 校验校验码是否合法var checkCode = function (val) {var pattern = /^[1-9]\d{5}(18|19|20)\d{2}((0[1-9])|(1[0-2]))(([0-2][1-9])|10|20|30|31)\d{3}[0-9Xx]$/;var factor = [7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2];var parity = ['1', '0', 'X', '9', '8', '7', '6', '5', '4', '3', '2'];var code = val[17];if (pattern.test(val)) {var sum = 0;for (var i = 0; i < 17; i++) {sum += val[i] * factor[i];}return parity[sum % 11] === code.toUpperCase();}return false;};// 校验省份代码是否合法var checkProv = function (val) {var pattern = /^[1-9][0-9]/;var provs = {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'};return pattern.test(val) && provs[val] !== undefined;};// 验证流程if (!isCardNo(val)) {return false;}if (val.length === 15) {return validIDCardNo(changeFifteenToEighteen(val));}if (checkCode(val)) {var date = val.substring(6, 14);return checkDate(date) && checkProv(val.substring(0, 2));}return false;
}

是否为身份证身份证号码为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