firebase get data

test.html

    <script src='https://cdn.firebase.com/js/client/2.0.4/firebase.js'></script>

    <script>
  //       var fb = new Firebase("https://sizzling-heat-3015.firebaseio.com/");
  //       fb.set({ name: "Alex bob" });

  //       fb.on("value", function(data) {
  // var name = data.val() ? data.val().name : "";
  // alert("My name is " + name);


     // Get a reference to our posts
    var ref = new Firebase("https://docs-examples.firebaseio.com/web/saving-data/fireblog/posts");

    // Attach an asynchronous callback to read the data at our posts reference
    ref.on("value", function(snapshot) {
      console.log(snapshot.val());
    }, function (errorObject) {
      console.log("The read failed: " + errorObject.code);
    });

    </script>