<zk>
    <div>
	<menubar>
	    <menu label="file menu">
		<menupopup>
		    <menuitem upload="true" onUpload="Clients.showNotification(event.getMedia().getName())" label="click me." />
		</menupopup>
	    </menu>
  	    <menuitem upload="true" onUpload="Clients.showNotification(event.getMedia().getName())" label="click me." />
	</menubar>
    </div>
</zk>