Quick function to detect if an RWK item is ash or not

isash.js

function isAsh (itemNumber) {
  var itype = parseInt(itemNumber / 1000, 10) % 100;
  var inum = parseInt(itemNumber, 10) % 1000;
  var iench = parseInt(itemNumber / 100000, 10) % 100 - 1;

  if (iench > 34) {
    return false;
  }
  if (iench < 0) {
    return false;
  }
  if (itype === 27) {
    return false;
  }
  if (inum > 70) {
    return false;
  }

  return true;
}