// JavaScript Document
var activeBeer = "beer1";
function flipBeers (beerID) { 
	new Effect.Opacity(activeBeer, {duration:1.0, from:1.0, to:0.0});
	new Effect.Opacity(beerID, {duration:1.0, from:0.0, to:1.0});
	activeBeer = beerID;
}