统一社会信用代码校验

function CheckSocialCreditCode(Code) {
 var patrn = /^[0-9A-Z]+$/;
 //18位校验及大写校验
 if ((Code.length != 18) || (patrn.test(Code) == false)) {
   console.info("不是有效的统一社会信用编码！");
   return false;
 }
 else {
   var Ancode;//统一社会信用代码的每一个值
   var Ancodevalue;//统一社会信用代码每一个值的权重 
   var total = 0;
   var weightedfactors = [1, 3, 9, 27, 19, 26, 16, 17, 20, 29, 25, 13, 8, 24, 10, 30, 28];//加权因子 
   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];
     //权重与加权因子相乘之和 
   }
   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];


   var checkcode = Code.substring(17, 18);
   if (logiccheckcode != checkcode) {
     console.info("不是有效的统一社会信用编码！");
     return false;
   }else{
     console.info("yes");
   }
   return true;
 }
　}