嚴重的: >>org.zkoss.zk.ui.UiException: Groupfoot must be placed after the last Row of the Group
>>	at org.zkoss.zul.Rows.insertBefore(Rows.java:276)
>>	at org.zkoss.zk.ui.impl.AbstractUiFactory.newComponent(AbstractUiFactory.java:95)
>>	at org.zkoss.zk.ui.impl.UiEngineImpl.execCreateChild0(UiEngineImpl.java:795)
>>	at org.zkoss.zk.ui.impl.UiEngineImpl.execCreateChild(UiEngineImpl.java:765)
>>	at org.zkoss.zk.ui.impl.UiEngineImpl.execCreate0(UiEngineImpl.java:674)
>>	at org.zkoss.zk.ui.impl.UiEngineImpl.access$0(UiEngineImpl.java:658)
>>	at org.zkoss.zk.ui.impl.UiEngineImpl$TemplateImpl.create(UiEngineImpl.java:2150)
>>	at org.zkoss.bind.impl.BindRowRenderer.render(BindRowRenderer.java:51)
>>	at org.zkoss.zul.Grid$Renderer.render(Grid.java:980)
>>	at org.zkoss.zul.Grid.doInitRenderer(Grid.java:899)
>>	at org.zkoss.zul.Grid.onInitRender(Grid.java:858)
>>	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
>>	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
>>	at java.lang.reflect.Method.invoke(Unknown Source)
>>	at org.zkoss.zk.ui.AbstractComponent.service(AbstractComponent.java:2721)
>>	at org.zkoss.zk.ui.AbstractComponent.service(AbstractComponent.java:2651)
>>	at org.zkoss.zk.ui.impl.EventProcessor.process(EventProcessor.java:136)
>>	at org.zkoss.zk.ui.impl.UiEngineImpl.processEvent(UiEngineImpl.java:1696)
>>	at org.zkoss.zk.ui.impl.UiEngineImpl.process(UiEngineImpl.java:1481)
>>	at org.zkoss.zk.ui.impl.UiEngineImpl.execNewPage0(UiEngineImpl.java:457)
>>	at org.zkoss.zk.ui.impl.UiEngineImpl.execNewPage(UiEngineImpl.java:310)
>>	at org.zkoss.zk.ui.http.DHtmlLayoutServlet.process(DHtmlLayoutServlet.java:214)
>>	at org.zkoss.zk.ui.http.DHtmlLayoutServlet.doGet(DHtmlLayoutServlet.java:134)
>>	at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
>>	at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
>>	at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
>>	at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:401)
>>	at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
>>	at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
>>	at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:766)
>>	at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:450)
>>	at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
>>	at org.mortbay.jetty.Server.handle(Server.java:326)
>>	at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
>>	at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:928)
>>	at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:549)
>>	at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
>>	at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
>>	at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:410)
>>	at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)