Generate random, valid, RSA ID Number

      var dob=800101;
      var gen=6;
      var nin = ''+dob + gen +
Math.floor(Math.random()*10) +
Math.floor(Math.random()*10) +
Math.floor(Math.random()*10) +
Math.floor(Math.random()*2) +
Math.floor(Math.random()*10);    
      var sumEven = 0;
      var sumOdd = 0;
      var even = false;
      for(i=0; i<12; i++) {
        if(!even) {
          sumOdd += parseInt(nin.charAt(i));
        } else {
          var doubleEven = 2*parseInt(nin.charAt(i));
          sumEven += Math.floor(doubleEven/10)+(doubleEven % 10);
        }
        even = !even
      }
      var total = sumOdd + sumEven;
      var check = (10 - (total % 10)) % 10;
      fullnin = nin+check;
console.log(fullnin);

//      this.page().replaceText(element, fullnin);