hiding the mouse cursor onover [half-solved]

hi,

first this post was a question, but as i found the solution i will share it here:

i have a popup text following the mouse, and the mouse pointer sometimes covers the text.
so i wanted to hide the mouse pointer "onover" while the text popup is shown,
and show it again "onout" when the mouse moves away.

the solution was :

<layer name="popup"
        handcursor="false"
	onover="set(cursors.standard,'none');"
	onout="set(cursors.standard,'default');" />

just note: in case you are tweening the alpha (fading in/out the layer),
you just you must do the cursor reset after the tween is finished,
so that onover cant occur anymore!

best,
index

UPDATE:
sadly this doesnt work when used on a polygon hotspot.
it seems that the polygon area always forces/updates the cursor to be a 'pointer'.