js验证统一社会信用代码

js验证统一社会信用代码

//验证信用代码
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)) {
      return '不是有效的统一社会信用编码';
      /*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) {
         return false;
      }else{
         return true;
      }
      return true;
   }
}