Show and Hide Elements with MouseOver

Hi all,

I have a simple Image like a "dot" i want that when anyone mouseover this dot another Elements like a line drawing with rectangle is showing with some Text.

But when i go to Actions "compositionReady" and make something like that:

                                                                                                                         sym.$("Line1").hide();

                                                                                                                         // Element ausblenden
                                                                                                                         sym.$("Line2").hide();

.. is not working! The "Dot" Image have a mouseover .Show Action.

What is wrong with that. Can anybody help me? :/

regards