function contact(part1, part2, title1, title2, span_info)
{
	// part1 + @ + part2 = email address
	// title1 + title2 = name
	// span_info (which could be empty) is the class info (etc) for
	//     a span tag surrounding the name
	
	span_info = "" + span_info + ""; // convert into a string (perhaps empty)
	
	if (part1.length == 0 && part2.length == 0) {
		if (span_info.length > 0) {
			document.write("<span " + span_info + ">" + title1 + title2 + "</span>");
		} else {
			document.write("" + title1 + title2);
		}
	} else {
		if (span_info.length > 0) {
			document.write("<a href='mailto:" + part1 + "@" + part2 + "' class=LinkDark><span " + span_info + ">" + title1 + title2 + "</span></a>");
		} else {
			document.write("<a href='mailto:" + part1 + "@" + part2 + "' class=LinkDark>" + title1 + title2 + "</a>");
		}
	}
}