实例
var tabpanel = new Ext.TabPanel({ ... listeners: { beforetabchange: function(tabPanel, newTab, currentTab) { var tab_add = '新增'; if (currentTab == null && newTab.title == '主面板') { return true; }else if (currentTab.title == tab_add) { Ext.Msg.alert('提示', '请先关闭'+currentTab.title+'窗口!'); return false; }else{ } return true; }, beforeremove: function(container, component) { component.setTitle('close'); } } });