This page tests the positioning of popup menus poping up around another node. The blue ones are fixed positioned: one is working in IE while the other works in other browsers. The yellow box is a padded div, the lime box is relatively positioned and the pink box is absolutely positioned.
Left-clicking in any of these boxes should show a menu below the box clicked (or above if there is not enough space below the element). Change the select value below to popup around different box of element.
dojo.html.boxSizing