expand

This event is fired when an item in the context menu is about to be expanded.

<script type="text/javascript">
jQuery(function($) {
   $("#menu").shieldContextMenu({
              target: ".itemlist",
              filter: ".item",
              events: {                    
              expand: function (e) {
                    alert("An item from the context menu is being expanded");
                    }
                }
            });
});
</script>