本文实例介绍了javascript简单实现对身份证的校验的关键性代码，分享给大家供大家参考，具体内容如下

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" }; checkCard = function(card) { //是否为空 if(card === '') { return "请输入身份证号，身份证号不能为空"; } //校验长度，类型 if(isCardNo(card) === false) { return "您输入的身份证号码不正确，请重新输入"; } //检查省份 if(checkProvince(card) === false) { return "您输入的身份证号码不正确,请重新输入"; } //校验生日 if(checkBirthday(card) === false) { return "您输入的身份证号码生日不正确,请重新输入"; } //检验位的检测 if(checkParity(card) === false) { return "您的身份证校验位不正确,请重新输入"; } return "ok"; }; //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