jQuery使用正则方法验证15/18身份证详解

//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.pTip("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 == &#39;18&#39;){
    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(&#39;1&#39;, &#39;0&#39;, &#39;X&#39;, &#39;9&#39;, &#39;8&#39;, &#39;7&#39;, &#39;6&#39;, &#39;5&#39;, &#39;4&#39;, &#39;3&#39;, &#39;2&#39;);
    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 == &#39;15&#39;){
    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(&#39;1&#39;, &#39;0&#39;, &#39;X&#39;, &#39;9&#39;, &#39;8&#39;, &#39;7&#39;, &#39;6&#39;, &#39;5&#39;, &#39;4&#39;, &#39;3&#39;, &#39;2&#39;);
    var cardTemp = 0, i;
    card = card.substr(0, 6) + &#39;19&#39; + 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;
}