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 changeText (node, text)
{
	while (node.hasChildNodes())
		node.removeChild(node.firstChild);

	node.appendChild(document.createTextNode(text));
}

function runScript (name, url, elem)
{
	if (!elem)
		form = document.forms[0];
	dscr = document.getElementById (name);
	if (dscr)
	{
		form.removeChild (dscr);
	}
	script = document.createElement('script');
	script.type = "text/javascript";
	script.src = url;
	script.id = name;

	form.appendChild (script);
}

function getElem (el_id)
{
	if (document.getElementById && document.getElementById(el_id))
		return document.getElementById(el_id);
	else if (document.all && document.all(el_id))
		return document.all(el_id);
  else if (document.layers && document.layers[el_id])
  	return document.layers[el_id];

	return false;
}