var rom_hlp = ['','I','II','III','IV','V','VI','VII','VIII','IX','X'];
function convertToRoman(number) {
  if (number >= 400)  {
      if (number >= 900) {
        if (number >= 1000) return "M" + convertToRoman(number - 1000);
        else return "CM" + convertToRoman(number - 900);
        } else {
        if (number >= 500) return "D" +  convertToRoman(number - 500);
        else  return "CD" + convertToRoman(number - 400);
        }
   } else {
       if (number >=90)  {
         if (number >=100) return "C" +   convertToRoman(number - 100);
         else  return "XC" +   convertToRoman(number - 90);
       } else {
         if (number <= 10) return rom_hlp[number];
         if (number >= 40) {
             if (number >=50) return "L" +   convertToRoman(number - 50);
             else return "XL" +   convertToRoman(number - 40);
             }
         return "X" +  convertToRoman(number - 10);
       }
   }
 }

var rom_hlp = ['','I','II','III','IV','V','VI','VII','VIII','IX','X'];


    function convertToRoman(number) {
      var r = "";
      while (number > 0 ) {

      if (number >= 400)  {
          if (number >= 900) {
            if (number >= 1000) { r+= "M"; number -= 1000; continue; }
            else {r += "CM"; number -= 900; continue;}
            } else {
            if (number >= 500) {r += "D";  number -= 500;continue;}
            else { r += "CD" ; number -=400;continue;}
            }


       } else {
           if (number >=90)  {
             if (number >=100) {r += "C" ;   number -=100;continue;}
             else { r += "XC" ;   number -=90;continue;}
           } else {

             if (number >= 40) {
                 if (number >=50) {r += "L" ;   number -=50;continue;}
                 else {r += "XL" ;   number -=40;continue;}
                 }
            if (number >10) { r+= "X"; number -= 10; continue;};
             return r+rom_hlp[number];

           }
       }
        }
     return r;
   }

function romanize (num) {
    if (!+num)
        return NaN;
    var digits = String(+num).split(""),
        key = ["","C","CC","CCC","CD","D","DC","DCC","DCCC","CM",
               "","X","XX","XXX","XL","L","LX","LXX","LXXX","XC",
               "","I","II","III","IV","V","VI","VII","VIII","IX"],
        roman = "",
        i = 3;
    while (i--)
        roman = (key[+digits.pop() + (i * 10)] || "") + roman;
    return Array(+digits.join("") + 1).join("M") + roman;
}