jquery div swap

How can I make it so when you click the 2nd time it will go back? I guess I gotta somehow find the active one but not sure.

$("#test").click(function(){
    $("#dsa").fadeOut()
    $("#asd").fadeIn()
  });

You looking for something like toggle() ?

Just use .toggle():

$("#test").click(function(){
    $("#dsa, #asd").toggle(400);
});