Display a Value in Currency Format by Stephen Bucaro

<script>
function formatTo(value, precision)
{
   // calculate multiplier required to get required number
   // of digits to the right of the decimal point
   var multiplier = Math.pow(10, precision);

   // round value to required number of digits
   var amount = Math.round(value * multiplier) / multiplier;

   // convert to string
   var strAmt = amount.toString();

   // determine if you need to add zeros to decimal part
   var decimalIndex = strAmt.indexOf(".");
   if(precision > 0 && decimalIndex < 0)
   {
      decimalIndex = strAmt.length;
      strAmt += '.';
   }

   // add any required zeros to decimal part
   while(decimalIndex + precision + 1 > strAmt.length)
   {
      strAmt += '0';
   }
   return strAmt;
}

document.write(formatTo(4.003, 2));
</script>