Removing mesh from 3d annotation

I would like to know how to remove a mesh from a 3d annotation

have tried the following with a scene containing 2 meshes:

console.println(scene.meshes.count ); // echo's 2 to console
scene.meshes.removeByIndex(0);
scene.update;
console.println(scene.meshes.count ); // echo's 1 to console

however, both meshes are stil visible on screen

Any help would be much appreciated!
Thanks in advance,

W.,
    There is a solution for your request. Yes, the current API does confuse
people on this issue. When you 'remove' a mesh from the scene, you are actually
only removing the mesh from the 'list' of scene items. You are not setting it's
visibility.

To set the mesh visibility, get the mesh object and set it's 'visible' property.
Here's a simple piece of code that uses the spacebar to toggle visibility on the
first mesh in the scene:

//====================================
//get target mesh
currMesh = scene.meshes.getByIndex(0);
currMesh.visible = false;

//toggle visibility with the spacebar
myKeyHandler = new KeyEventHandler();
myKeyHandler.onEvent = function(event)
{
    if (event.characterCode == 32) //spacebar
    {
        currMesh.visible = !currMesh.visible;
    }
}
runtime.addEventHandler(myKeyHandler);

Gary,

Thanks for the reply.
Toggeling visibility is helpful, but I want to remove the mesh from the
annotation. My end user will be able to ad and remove meshes from the
scene/annotation. So instead of making the meshes invisible, I want to remove
them, otherwise the meshes will stay in memory and are not used.

Thanks again.