function checkCode(code) {
            if (code.length != 18) {
                alert("社会信用代码长度错误！");
                return false;
            }
            var reg = /^([0-9ABCDEFGHJKLMNPQRTUWXY]{2})([0-9]{6})([0-9ABCDEFGHJKLMNPQRTUWXY]{9})([0-9XY])$/;
            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;
            }
        }

    
    请问大神有没有18位组织机构代码校验规则，网上很多有误。包括上面这个也是有问题。举例：‘91350000MA2Y31FH5’