Форматирование числа на js

numberFormat.js

/*
  num               number
  thSeparator       thousands separator
  floatSeparator    decimal separator
  floatFixed        fixed number of digits after the decimal point
*/
function numberFormat(num, thSeparator, floatSeparator, floatFixed)
{
	  var n;
	  if (!thSeparator) { thSeparator = ''; }
	  if (floatFixed) { n = num.toFixed(floatFixed); } else { n = num.toString(); }
	  if (floatSeparator) { n = n.replace(".", floatSeparator); }
	  return n.replace(/(\d{1,3}(?=(?:\d\d\d)+(?!\d)))/g, "$1" + thSeparator);
}