<zk>
	<window title="Chat" border="normal">
	    <zscript><![CDATA[
	    import org.zkoss.zk.ui.event.*;
	    EventQueue que = EventQueues.lookup("chat", EventQueues.SESSION, true);
	    que.subscribe(new EventListener() {
	        public void onEvent(Event evt) {
	            new Label(evt.getData()).setParent(inf);
	        }
	    }); 
	    void post(Button tb, int cnt) {
	        String text = tb.getLabel();
	        que.publish(new Event("onChat", null, text+" " + cnt));
	    }
	    ]]></zscript>
		<spinner id="pdo" value="5" /> 
	    Say <button label="send message" onClick="post(self, pdo.getValue())" />
	    <separator bar="true"/>
	    <vbox id="inf"/>
	</window>
</zk>