var gFriendCurrentlyVisible = "Intro";
	
// Usage: showFriend('name');  Gee... why use 10 lines when you can use 100?

function showFriend (who) {
	if (gFriendCurrentlyVisible != null) {
		friendToHide = document.getElementById(gFriendCurrentlyVisible);
		friendToHide.style.visibility = "hidden";
	}
	
	batman = document.getElementById(who);
	batman.style.visibility = "visible";
	gFriendCurrentlyVisible = who;
}