ExtJs布局之tabPanel

DOCTYPE html>
< html >
< head >
    < title >ExtJs title >
        < meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
    < link rel="stylesheet" type="text/css" href="ExtJs/packages/ext-theme-crisp/build/resources/ext-theme-crisp-all.css">
        < script type="text/javascript" src="ExtJs/ext-all.js"> script >
        < script type="text/javascript" src="ExtJs/bootstrap.js"> script >
        < script type="text/javascript" src="ExtJs/packages/ext-theme-crisp/build/ext-theme-crisp.js"> script >

    < script type="text/javascript">
            Ext.onReady(function(){
        var tabPanel = Ext.create('Ext.tab.Panel', {
          title: 'Ext.tab.Panel',
          frame: true,
          height: 150,
          width: 900,
          activeTab: 0,
          renderTo: Ext.getBody(),
          items: [{
            title: 'tab标签页1',
            html: 'tab标签页1的内容'
          }],
          buttons: [{
            text: '增加标签页',
            handler: addTabPage
          }]
        });
        function addTabPage() {
          var index = tabPanel.items.length + 1;
          var tabPage = tabPanel.add({
            title: 'tab标签页' + index,
            html: 'tab标签页' + index + '内容',
            closable: 'true'
          })
          tabPanel.setActiveTab(tabPage);
        }
      });
    script >
head >
< body >

body >
html >