var tabPanel = new Ext.TabPanel({
	    activeTab: 0,   
	    region:'center',   
	    layoutOnTabChange : false,
	    deferredRender: true,   
	    items:[
	   
	    {
	        title: '百度',   
	        layout: 'fit',
	        height: 375,    
	        id: 'training_grief_rep_tab_4',   
	        border: false,
	        deferredRender: false,
	        //items : new TrainingBriefSummaryItem({sunmmaryId: tariningId}),
	        autoScroll : true,
	        html:' <iframe scrolling="auto" frameborder="0" width="100%" height="100%" src="'+'http://www.baidu.com'+'"> </iframe>'
	    }
	    ]   
    });

图片