function addTarget()
{
	$$('a').each(function(link) {
		if (link.href && link.href.substr(0,7) == "http://")
		{
			if (link.href.substr(0,16) != "http://localhost" && link.href.substr(0,13) != "http://townof")
			{
				link.target = "_new";
			}
		}
	});
}

Event.observe(window, 'load', addTarget);