romanizer.js

function romanizer(num) {
  var result = '';
  var decimals = [1000, 900, 500, 400, 100, 90, 50, 40, 10, 9, 5, 4, 1];
  var roman = ['M', 'CM', 'D', 'CD', 'C', 'XC', 'L', 'XL', 'X', 'IX', 'V', 'IV', 'I'];
  for (var i = 0; i < decimals.length; i++) {
      while (num >= decimals[i]) {
          result += roman[i];
          num -= decimals[i];
      }
  }
  return result;
}