jQuery if statement go outside(continue)

I have a little problem that i cannot handler. I have 3-4 if statement and one if in another, but i want to go outside(continue).

Here is my code: jsfiddle

    var a = "2";
    var b = "A";

    if(a == "1") {
      alert("1");
    } else if (a == "2") {
      if(b == "X") {
        alert("GOAL!");
      }
    } else if(a == "3") {
      alert("3");
    } else {
      alert("NOTHING!");
    }