function ValFloat(ObjectValue,AllowComma)
{
	// Used Internally by ValidateInt, ValidateFloat

	//Returns true if value is a number or is NULL
	//otherwise returns false	
	
	if (ObjectValue.length == 0) return true;
	
	//Returns true if value is a number defined as
	//   having an optional leading + or -.
	//   having at most 1 decimal point.
	//   otherwise containing only the characters 0-9.
	var start_format = " .+-0123456789";
	var number_format = " .0123456789";
	if (AllowComma == 1) number_format=number_format + ',';
	var check_char;
	var decimal = false;
	var trailing_blank = false;
	var digits = false;
	
	//The first character can be + - .  blank or a digit.
	check_char = start_format.indexOf(ObjectValue.charAt(0))
	//Was it a decimal?
	if (check_char == 1)
		decimal = true;
	else if (check_char < 1)
		return false;
	
	//Remaining characters can be only . or a digit, but only one decimal.
	for (var i = 1; i < ObjectValue.length; i++)
	{
		check_char = number_format.indexOf(ObjectValue.charAt(i))
		if (check_char < 0)
			return false;
		else if (check_char == 1)
		{
			if (decimal)		// Second decimal.
				return false;
			else
				decimal = true;
		}
		else if (check_char == 0)
		{
			if (decimal || digits) trailing_blank = true;
			// ignore leading blanks
		}
		else if (trailing_blank)
			return false;
		else
			digits = true;
	}	
	//All tests passed, so...
	return true
}