// variable 'copyright' in function is defined in the global script for each site and is set to the first year the site was created.

function getCopyrightYear(y) {
	var year = "2010";
	if (y)
		copyright = y;
	document.writeln(typeof copyright == "undefined" || !copyright || copyright == year?year:copyright + "-" + year);
}

getCopyrightYear();