var currentPopup;
function showPopup(id)
{
	if (currentPopup && ! (currentPopup == id)) {
		hidePopup(currentPopup);
	}
	Effect.Appear(id, {duration: 0.2});
	currentPopup = id;
}
function hidePopup(id)
{
	Effect.Fade(id, {duration: 0.2});
}