Amount or figures convert in to words

Dear Sir,

I have found the answer but i can not figure out where to place which script.

i found this:

aTens = [ "Twenty", "Thirty", "Forty", "Fifty", "Sixty", "Seventy", "Eighty", "Ninety"];

aOnes = [ "Zero", "One", "Two", "Three", "Four", "Five", "Six", "Seven", "Eight", "Nine",

  "Ten", "Eleven", "Twelve", "Thirteen", "Fourteen", "Fifteen", "Sixteen", "Seventeen", "Eighteen",

  "Nineteen" ];

function ConvertToHundreds(num)

{

   var cNum, nNum;

   var cWords = "";

   num %= 1000;

   if (num > 99) {

      /* Hundreds. */

      cNum = String(num);

      nNum = Number(cNum.charAt(0));

      cWords += aOnes[nNum] + " Hundred";

      num %= 100;

      if (num > 0)

         cWords += " and "

   }

   if (num > 19) {

      /* Tens. */

      cNum = String(num);

      nNum = Number(cNum.charAt(0));

      cWords += aTens[nNum - 2];

      num %= 10;

      if (num > 0)

         cWords += "-";

   }

   if (num > 0) {

      /* Ones and teens. */

      nNum = Math.floor(num);

      cWords += aOnes[nNum];

   }

   return cWords;

}

function ConvertToWords(num)

{

   var aUnits = [ "Thousand", "Million", "Billion", "Trillion", "Quadrillion" ];

   var cWords = (num >= 1 && num < 2) ? "Dollar and " : "Dollars and ";

   var nLeft = Math.floor(num);

   for (var i = 0; nLeft > 0; i++) {

       if (nLeft % 1000 > 0) {

          if (i != 0)

             cWords = ConvertToHundreds(nLeft) + " " + aUnits[i - 1] + " " + cWords;

          else

             cWords = ConvertToHundreds(nLeft) + " " + cWords;

       }

       nLeft = Math.floor(nLeft / 1000);

   }

   num = Math.round(num * 100) % 100;

   if (num > 0)

      cWords += ConvertToHundreds(num) + " Cents";

   else

      cWords += "Zero Cents";

   return cWords;

}

and this:

event.value = "";

var f = this.getField("Initial Amount Deposit");

if(f.valueAsString != "") {

event.value = ConvertToWords(f.value);

}

I am typing amount in Initial Amount Deposit field and want words in Initial Amount Txt.

Please help.