组织机构代码和社会信用码验证

function checkCode() {//社会统一验证码

    var code = document.getElementById("userName").value;

    if(code.length != 18&&code.length != 9){

        alert("社会信用代码或者组织机构代码长度错误！");

        return false;

    }

    if(code.length == 9){

        var ws = [3, 7, 9, 10, 5, 8, 4, 2];

        var str = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ';

        var reg = /^([0-9A-Z]){9}$/;

        if (!reg.test(code)) {

            alert("组织机构代码错误");

            return false;

        }

        var sum = 0;

        for (var i = 0; i < 8; i++) {

            sum += str.indexOf(code.charAt(i)) * ws[i];

        }

        alert(code.substring(8,9));

        var C9 = 11 - (sum % 11);

        if (C9 == 11) {

            C9='0';

        } else if (C9 == 10) {

            C9='X';

        }

        alert(C9);

        if(C9!=code.substring(8,9)){

            alert("组织机构代码错误");

            return false;

        }

 

    }

    if(code.length == 18){

        var reg = /^([0-9ABCDEFGHJKLMNPQRTUWXY]{2})([0-9]{6})([0-9ABCDEFGHJKLMNPQRTUWXY]{9})([0-9Y])$/;

        if(!reg.test(code)){

            alert("社会信用代码校验错误！");

            return false;

        }

        var str = '0123456789ABCDEFGHJKLMNPQRTUWXY';

        var ws =[1,3,9,27,19,26,16,17,20,29,25,13,8,24,10,30,28];

        var codes  = new Array();

        codes[0] = code.substr(0,code.length-1);

        codes[1] = code.substr(code.length-1,code.length);

 

        var sum = 0;

        for(var i=0;i<17;i++){

            sum += str.indexOf(codes[0].charAt(i)) * ws[i];

        }

 

        var c18 = 31 - (sum % 31);

        if(c18 == 31){

            alert("第18位 == 31");

            c18 = 'Y';

        }else if(c18 == 30){

            alert("第18位 == 30");

            c18 = '0';

        }

 

        if(c18 != codes[1]){

            alert("社会信用代码有误！"+c18);

            return false;

        }

    }

 

 

}