Hotspot Tooltip on Mouse-over? [event handlers]

[SolidModeler]

3DHOP is amazing - excellent work!
I'd like to present users with a nice tooltip when they hover over hotspots.

The 3DHOP Hotspot tutorial works great as described using the JavaScript Alert function fired by the _onEnterSpot event. So I tried substituting the _onLeaveSpot with the _onEnterSpot mouse-over event. But the Alert was no longer invoked.

The respective parts of the code are:
presenter._onEnterSpot = onEnterSpot;
and

function onEnterSpot(id) {
  switch(id) {
     case 'Spot1'   : alert("Thing 1"); break;
     case 'Spot2' : alert("Thing 2"); break;
  }
}

Is it obvious what I'm doing wrong?
I figured I'd better ask before attempting to build a handler for the tooltip itself.

[potenziani]

Dear @SolidModeler,

sorry for the huge delay in the reply! You probably already solved the problem by yourself, however, since this answer might be useful to other users, here is a tip for using the onEnterSpot feature in the right way!

Your code seems to be ok, the only thing that could be wrong is the unique ID of the hotspots raising the events (Spot1 and Spot2 in this case). As you know the correspondence between the hotspots/instances unique IDs used in the setScene definition and those used in the event handlers provided by 3DHOP is essential to get proper functioning.

Let's see an example! If you try to edit the Hotspots and Events how-to (3.2), the respective parts of the code should be:

presenter._onEnterSpot = onEnterSpot;

and

function onEnterSpot(id) {
  switch(id) {
     case 'Wing'   : alert("Thing 1"); break;
     case 'Sphere' : alert("Thing 2"); break;
  }
}

This should work (if not, let us know), giving you the possibility to build a nice tooltip without rewriting a tooltip handler!