How to query terrain height / altitude information from a map in Javascript

[YeeenYeeen]

If I do the following I will only get the x and y coordinates. How do I get the z coordinates? Btw I have the dted layer cached already.

connect.connect(this.map.root, "onClick", function(evt) {
    console.log(evt.mapPoint.x + ", " + evt.mapPoint.y);
});

[JeffPace]

There is no z data unless you add your own layer with elevation, the javascript API is 2D