Roman Numeral Converter

function convertToRoman(num) {
    var roman="";
    var romanNumeral=['M', 'CM', 'D', 'CD', 'C', 'XC', 'L', 'XL', 'X', 'IX', 'V', 'IV', 'I'];
    var numbers=[1000, 900, 500, 400, 100, 90, 50, 40, 10, 9, 5, 4, 1];

    for(var i=0;i<numbers.length;i++){
        while(num>=numbers[i]){
            roman = roman + romanNumeral[i];
            num = num - numbers[i];
        }
    }

 return roman;
}

convertToRoman(36);