Item Action PopUp

With Pedros help (), I now get a little popup only containing the album/item actions if I rightclickinto my theme. Unfortunately, I only get the dropdown in the popup, not the list as in the sidebar.
I use

<div id="gsSidebar" class="gcBackground1 gcBorder1">
    {g->block type="core.ItemLinks" item=$child links=$child.itemLinks class="gbBlock"}
<br/>
</div>

and

any idea how I can bring the popup at the position I clicked the mouse
(currently use

<div id="popup" style="position: absolute; left: 480px; top: 480px;  
z-index: 15; visibility: hidden;">

)