Convert Arabic Numbers to Roman Numerals

roman_numerals.js

var romanNumbers = [['','I','II','III','IV','V','VI','VII','VIII','IX'],
                    ['','X','XX','XXX','XL','L','LX','LXX','LXXX','XC'],
                    ['','C','CC','CCC','CD','D','DC','DCC','DCCC','CM']];

function convert(number) {
  var romanNumeral = '';
  var reversedNumber = number.toString().split('').reverse();
  for (var i=0; i < digits.length; i++){
   romanNumeral  = romanNumbers[i][parseInt(reversedNumber[i])] + romanNumeral;
  }
  return romanNumeral;  
}