No problem.
I was able to reduce the jumping by moving the ContextMenu declarations... as you told me.
It's better now ... not a \"show stopper\" any more.
But one more question:
The nodes in this sample are not automatically selected when they're right-clicked. Is this a normal behaviour? I compared with some demo samples, i don't find any option where to activate this.
Finally i called the node.select() manually by javascript.
It works, but is it normal?