//身份证省的编码
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"
};

//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){
//alert("demo");
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,birthday);
}
return false;
}

//校验日期
function verifyBirthday(year,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 == '18'){
var arrInt = new Array(7,9,10,5,8,4,2,1,6,3,7,2);
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
function changeFivteenToEighteen(card){
if(card.length == '15')
{
var arrInt = new Array(7,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;
}