身份证验证

var num="320324199202106666";

function checkCardId(num){
    num = num.toUpperCase();
    //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。
    if (!(/(^\d{15}$)|(^\d{17}([0-9]|X)$)/.test(num)))
    {
        //alert('输入的身份证号长度不对，或者号码不符合规定！\n15位号码应全为数字，18位号码末位可以为数字或X。');
        return false;
    }
    //校验位按照ISO 7064:1983.MOD 11-2的规定生成，X可以认为是数字10。
    //下面分别分析出生日期和校验位
    var len, re;
    len = num.length;
    if (len == 15)
    {
        re = new RegExp(/^(\d{6})(\d{2})(\d{2})(\d{2})(\d{3})$/);
        var arrSplit = num.match(re);
 
        //检查生日日期是否正确
        var dtmBirth = new Date('19' + arrSplit[2] + '/' + arrSplit[3] + '/' + arrSplit[4]);
        var bGoodDay;
        bGoodDay = (dtmBirth.getYear() == Number(arrSplit[2])) && ((dtmBirth.getMonth() + 1) == Number(arrSplit[3])) && (dtmBirth.getDate() == Number(arrSplit[4]));
        if (!bGoodDay)
        {
            //alert('输入的身份证号里出生日期不对！');
            return false;
        }
        else
        {
                //将15位身份证转成18位
                //校验位按照ISO 7064:1983.MOD 11-2的规定生成，X可以认为是数字10。
                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 nTemp = 0, i;
                num = num.substr(0, 6) + '19' + num.substr(6, num.length - 6);
                for(i = 0; i < 17; i ++)
                {
                    nTemp += num.substr(i, 1) * arrInt[i];
                }
                num += arrCh[nTemp % 11];
                return true;
        }
    }
    if (len == 18)
    {
        re = new RegExp(/^(\d{6})(\d{4})(\d{2})(\d{2})(\d{3})([0-9]|X)$/);
        var arrSplit = num.match(re);
 
        //检查生日日期是否正确
        var dtmBirth = new Date(arrSplit[2] + "/" + arrSplit[3] + "/" + arrSplit[4]);
        var bGoodDay;
        bGoodDay = (dtmBirth.getFullYear() == Number(arrSplit[2])) && ((dtmBirth.getMonth() + 1) == Number(arrSplit[3])) && (dtmBirth.getDate() == Number(arrSplit[4]));
        if (!bGoodDay)
        {
            //alert('输入的身份证号里出生日期不对！');
            return false;
        }
    else
    {
        //检验18位身份证的校验码是否正确。
        //校验位按照ISO 7064:1983.MOD 11-2的规定生成，X可以认为是数字10。
        var valnum;
        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 nTemp = 0, i;
        for(i = 0; i < 17; i ++)
        {
            nTemp += num.substr(i, 1) * arrInt[i];
        }
        valnum = arrCh[nTemp % 11];
        if (valnum != num.substr(17, 1))
        {
            //alert('18位身份证的校验码不正确！应该为：' + valnum);
            return false;
        }
        return true;
    }
    }
    return false;
}

 

//判断

if(!checkCardId(num)){

　　alert("身份证不正确");

}