function number_format (number, decimals, dec_point, thousands_sep)
{
  var exponent = "";
  var numberstr = number.toString ();
  var eindex = numberstr.indexOf ("e");
  if (eindex > -1)
  {
    exponent = numberstr.substring (eindex);
    number = parseFloat (numberstr.substring (0, eindex));
  }
  
  if (decimals != null)
  {
    var temp = Math.pow (10, decimals);
    number = Math.round (number * temp) / temp;
  }
  var sign = number < 0 ? "-" : "";
  var integer = (number > 0 ? 
      Math.floor (number) : Math.abs (Math.ceil (number))).toString ();
  
  var fractional = number.toString ().substring (integer.length + sign.length);
  dec_point = dec_point != null ? dec_point : ".";
  fractional = decimals != null && decimals > 0 || fractional.length > 1 ? 
               (dec_point + fractional.substring (1)) : "";
  if (decimals != null && decimals > 0)
  {
    for (i = fractional.length - 1, z = decimals; i < z; ++i)
      fractional += "0";
  }
  
  thousands_sep = (thousands_sep != dec_point || fractional.length == 0) ? 
                  thousands_sep : null;
  if (thousands_sep != null && thousands_sep != "")
  {
	for (i = integer.length - 3; i > 0; i -= 3)
      integer = integer.substring (0 , i) + thousands_sep + integer.substring (i);
  }
  
  return sign + integer + fractional + exponent;
}

function stringToFloat(string) {
    var PosPunkt = string.indexOf(".", 0);
    var PosKomma = string.indexOf(",", 0);
    if (PosKomma < 0) PosKomma = string.length;

    while ((0 <= PosPunkt) && (PosPunkt < PosKomma)) {
        string = string.substring(0, PosPunkt) + string.substring(PosPunkt + 1, string.length);
        PosPunkt = string.indexOf(".", 0);
        PosKomma--;
    }

    PosKomma = string.indexOf(",", 0);
    if (PosKomma >= 0) {
        string = string.substring(0, PosKomma) + "." + string.substring(PosKomma + 1, string.length);
    }

    return parseFloat(string);
}