function getCopyrightDate(iStartYear, iRangeSize, separatorString) {
	var date = new Date();

	// if no start year is passed in, then use the current year
	if (iStartYear == null || iStartYear == 0 || iStartYear == "") {
		iStartYear = date.getFullYear();
	}

	// default end year to current year
	var iEndYear = date.getFullYear();
	if (iRangeSize != null && iRangeSize != "") {
		iEndYear = iStartYear + iRangeSize;
	}

	if (iStartYear == iEndYear) {
		return iStartYear.toString();
	}
	else {
		var separator = "-";
		if (separatorString != null && separatorString != "")
			separator = separatorString;
		return iStartYear + separator + iEndYear;
	}
}