Validate TC ID

validate-tc-id.js

//=======================================
//              CHECK TC ID             =
//=======================================
var checkTcNum = function(value) {
  value = value.toString();
  var isEleven = /^[0-9]{11}$/.test(value);
  var totalX = 0;
  for (var i = 0; i < 10; i++) {
    totalX += Number(value.substr(i, 1));
  }
  var isRuleX = totalX % 10 == value.substr(10,1);
  var totalY1 = 0;
  var totalY2 = 0;
  for (var i = 0; i < 10; i+=2) {
    totalY1 += Number(value.substr(i, 1));
  }
  for (var i = 1; i < 10; i+=2) {
    totalY2 += Number(value.substr(i, 1));
  }
  var isRuleY = ((totalY1 * 7) - totalY2) % 10 == value.substr(9,0);
  return isEleven && isRuleX && isRuleY;
};
window.checkTcNum = checkTcNum;
//--------  End of check tc id  ---------//