Thank you friend.
If solved with code below.
self.pnAgrupamentoMenu.ClientEvents.ExtEvents.Values['afterrender']:= 'function (sender, eOpts) {sender.getEl().setStyle("position", "fixed"); sender.getEl().setStyle("left", "3px"); sender.getEl().setStyle("top", "3px"); sender.getEl().setStyle("z-index", 9999);}';