<?xml version="1.0" encoding="UTF-8"?><!--B30-1918796.zul{{IS_NOTE	Purpose:			Description:			History:		Wed Mar 19 10:08:14 TST 2008, Created by jumperchen}}IS_NOTECopyright (C) 2008 Potix Corporation. All Rights Reserved.{{IS_RIGHT}}IS_RIGHT--><zk xmlns:n="http://www.zkoss.org/2005/zk/native">	<n:p>Grid header should disappear in this case.</n:p>	<window width="250px">	<groupbox visible="false" id="gpb">		<caption label="caption" />		<grid>			<columns>				<column />			</columns>			<rows>				<row>Test:</row>			</rows>		</grid>	</groupbox>	<button label="Show Hide 2nd groupbox"		onClick="gpb.setVisible(!gpb.isVisible())" /></window></zk>