var view = new Ext.Viewport({ enableTabScroll: true, layout: "border", items: [ { title: 'xxx', collapsible: true, html: "", region: "west", width: 200 , items: [tree_cmp] } , { //title: 'xxx', // html: "", xtype: "tabpanel", activeTab: 0, region: "center", items: [ { layout: 'fit', // region: "center", // renderTo: Ext.getBody(), title: "xxx", items: [gridxxx] // ,buttons: []