js實現對身份證校驗

var vcity={ 11:"北京",12:"天津",13:"河北",14:"山西",15:"內蒙古",
21:"遼寧",22:"吉林",23:"黑龍江",31:"上海",32:"江蘇",
33:"浙江",34:"安徽",35:"福建",36:"江西",37:"山東",41:"河南",
42:"湖北",43:"湖南",44:"廣東",45:"廣西",46:"海南",50:"重慶",
51:"四川",52:"貴州",53:"雲南",54:"西藏",61:"陝西",62:"甘肅",
63:"青海",64:"寧夏",65:"新疆",71:"臺灣",81:"香港",82:"澳門",91:"國外"
};

checkCard = function(card)
{

//是否為空
if(card === '')
{

return "請輸入身份證號，身份證號不能為空";
}
//校驗長度，類型
if(isCardNo(card) === false)
{

return "您輸入的身份證號碼不正確，請重新輸入";
}
//檢查省份
if(checkProvince(card) === false)
{
return "您輸入的身份證號碼不正確,請重新輸入";
}
//校驗生日
if(checkBirthday(card) === false)
{
return "您輸入的身份證號碼生日不正確,請重新輸入";
}
//檢驗位的檢測
if(checkParity(card) === false)
{
return "您的身份證校驗位不正確,請重新輸入";
}

return "ok";
};


//檢查號碼是否符合規範，包括長度，類型
isCardNo = function(card)
{
//身份證號碼為15位或者18位，15位時全為數字，18位前17位為數字，最後一位是校驗位，可能為數字或字元X
var reg = /(^\d{15}$)|(^\d{17}(\d|X)$)/;
if(reg.test(card) === false)
{
return false;
}

return true;
};

//取身份證前兩位,校驗省份
checkProvince = function(card)
{
var province = card.substr(0,2);
if(vcity[province] == undefined)
{
return false;
}
return true;
};

//檢查生日是否正確
checkBirthday = function(card)
{
var len = card.length;
//身份證15位時，次序為省（3位）市（3位）年（2位）月（2位）日（2位）校驗位（3位），皆為數字
if(len == '15')
{
var re_fifteen = /^(\d{6})(\d{2})(\d{2})(\d{2})(\d{3})$/;
var arr_data = card.match(re_fifteen);
var year = arr_data[2];
var month = arr_data[3];
var day = arr_data[4];
var birthday = new Date('19'+year+'/'+month+'/'+day);
return verifyBirthday('19'+year,month,day,birthday);
}
//身份證18位時，次序為省（3位）市（3位）年（4位）月（2位）日（2位）校驗位（4位），校驗位末尾可能為X
if(len == '18')
{
var re_eighteen = /^(\d{6})(\d{4})(\d{2})(\d{2})(\d{3})([0-9]|X)$/;
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;
};

//校驗日期
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)
{
//判斷年份的範圍（3歲到100歲之間)
var time = now_year - year;
if(time >= 3 && time <= 100)
{
return true;
}
return false;
}
return false;
};

//校驗位的檢測
checkParity = function(card)
{
//15位轉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位轉18位身份證號
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;
};