Untitled

How do I access a JSON object using a javascript variable
[{"ADAM":{"TEST":1}, "BOBBY":{"TEST":2}}]

var x = "ADAM";
alert(data.x.TEST);

var data = [{"ADAM":{"TEST":1}, "BOBBY":{"TEST":2}}],
    x = "ADAM";

alert(data[0][x].TEST);

var data = [{"ADAM":{"TEST":1}, "BOBBY":{"TEST":2}}]
alert(data[0].ADAM.TEST);
alert(data[0]['ADAM'].TEST)

var data = {"ADAM":{"TEST":1}, "BOBBY":{"TEST":2}};

alert(data[0]["ADAM"].TEST);