身份證號碼驗證

以下爲驗證身份證號碼的js代碼，調用方式爲：

checktheform（cardid）調用返回布爾類型結果。

//TODO
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"
};

checktheform = 
function(cardid)
{

    //var card = document.getElementById(cardid).value;
    var card = cardid;
    //是否爲空
    if (card
===
'') 
{
        //alert('請輸入身份證號，身份證號不能爲空');
        //document.getElementById(cardid).focus;
        return 
false;
    }
    //校驗長度，類型
    if (isCardNo(card)
===
false) 
{
        //alert('您輸入的身份證號碼不正確，請重新輸入');
        //document.getElementById(cardid).focus;
        return 
false;
    }
    //檢查省份
    if (checkProvince(card)
===
false) 
{
        //alert('您輸入的身份證號碼不正確,請重新輸入');
        //document.getElementById(cardid).focus;
        return 
false;
    }
    //校驗生日
    if (checkBirthday(card)
===
false) 
{
        //alert('您輸入的身份證號碼生日不正確,請重新輸入');
        //document.getElementById(cardid).focus();
        return 
false;
    }
    //檢驗位的檢測
    if (checkParity(card)
===
false) 
{
        //alert('您的身份證校驗位不正確,請重新輸入');
        //document.getElementById(cardid).focus();
        return 
false;
    }
    return true;
};

//檢查號碼是否符合規範，包括長度，類型
isCardNo = function(card)
{
    //身份證號碼爲15位或者18位，15位時全爲數字，18位前17位爲數字，最後一位是校驗位，可能爲數字或字符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，次序爲省（3位）市（3位）年（2位）月（2位）日（2位）校驗位（3位），皆爲數字
    if (len
== 
'15') {
        var re_fifteen 
= /^(\d{6})(\d{2})(\d{2})(\d{2})(\d{3})$/;
        var arr_data 
= card.match(re_fifteen);
        var year 
= arr_data[2];
        var month 
= arr_data[3];
        var day 
= arr_data[4];
        var birthday 
= new Date('19'
+ year + 
'/' + month 
+ '/' + day);
        return verifyBirthday('19'
+ year, month, day, birthday);
    }
    //身份證18位時，次序爲省（3位）市（3位）年（4位）月（2位）日（2位）校驗位（4位），校驗位末尾可能爲X
    if (len
== 
'18') {
        var re_eighteen 
= /^(\d{6})(\d{4})(\d{2})(\d{2})(\d{3})([0-9]|X)$/;
        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;
};

轉載地址：

http://blog.chinaunix.net/uid-29140694-id-3940475.html