js驗證營業執照號碼是否合規

需求：最近要做實名驗證的功能，但是驗證我們要驗證嚴謹一點，參考了網上關於營業執照號碼規則和一些大俠的代碼的代碼，總結一下.

營業執照號碼規則：規則

代碼：

//方法一：
function checkLicense(code){
    var tip = "OK";
    var pass= true;

    if(code.length != 18){
        tip = "社會信用代碼長度錯誤！";
        pass = false;
    }
    var reg = /^([159Y]{1})([1239]{1})([0-9]{6})([0-9ABCDEFGHJKLMNPQRTUWXY]{9})([0-9ABCDEFGHJKLMNPQRTUWXY]{1})$/;
    if(!reg.test(code)){
        tip = "社會信用代碼校驗錯誤！";
        pass = false;
    }
    //不用I、O、S、V、Z
    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();
    var sum = 0;
    codes[0] = code.substr(0,code.length-1);
    codes[1] = code.substr(code.length-1,code.length);

    for(var i=0;i<codes[0].length;i++){
        var Ancode = codes[0].charAt(i);
        var Ancodevalue = str.indexOf(Ancode);
        sum += Ancodevalue * ws[i];
    }
    var indexOfc18 = 31 - (sum % 31);
    var c18 = str.charAt(indexOfc18);
    if(c18 != codes[1]){
        tip = "社會信用代碼有誤！";
        pass = false;
    }

    return {'errCode':pass, 'errMsg':tip};
}

//方法二

function checkLicense(code){
    var tip = "OK";
    var pass= true;

　　var patrn = /^[0-9A-Z]+$/;
    //18位校驗及大寫校驗
    if ((code.length != 18) || (patrn.test(code) == false))
    {
        alert("不是有效的統一社會信用編碼！");
    }
    else
    {
        var Ancode;//統一社會信用代碼的每一個值
        var Ancodevalue;//統一社會信用代碼每一個值的權重
        var total = 0;
        var weightedfactors = [1, 3, 9, 27, 19, 26, 16, 17, 20, 29, 25, 13, 8, 24, 10, 30, 28];//加權因子
        var str = '0123456789ABCDEFGHJKLMNPQRTUWXY';
        //不用I、O、S、V、Z
        for (var i = 0; i < code.length - 1; i++)
        {
            Ancode = code.substring(i, i + 1);
            Ancodevalue = str.indexOf(Ancode);
            total = total + Ancodevalue * weightedfactors[i];
            //權重與加權因子相乘之和
        }
        alert(total);
        var logiccheckcode = 31 - total % 31;
        if (logiccheckcode == 31)
        {
            logiccheckcode = 0;
        }
        var Str = "0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F,G,H,J,K,L,M,N,P,Q,R,T,U,W,X,Y";
        var Array_Str = Str.split(',');
        logiccheckcode = Array_Str[logiccheckcode];
        alert(logiccheckcode);


        var checkcode = code.substring(17, 18);
        if (logiccheckcode != checkcode)
        {
            pass = false;
            tip = "不是有效的統一社會信用編碼！";
            alert("不是有效的統一社會信用編碼！");
        }
    }



    return {'errCode':pass, 'errMsg':tip};
}