js验证身份证

 /***********************************身份证验证*************************************************/

         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"
                };

     //检查号码是否符合规范，包括长度，类型
     //isCardNo = function(card)
     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
     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;
     };