extjs实现左侧tab

layout = new Ext.BorderLayout(document.body, ... {

center:...{
titlebar:false,
tabPosition:'left'
}

} );

layout.beginUpdate();

variframe = Ext.DomHelper.append(document.body,
... {tag:'iframe',frameBorder:0,src:'BusiLineView.html'} );

layout.add( ' center ' , new Ext.ContentPanel(iframe, ... {title:'公司',fitToFrame:true,closable:false} ));
layout.add( ' center ' , new Ext.ContentPanel( ' panel-bk ' , ... {title:'板块',closable:false} ));
layout.add( ' center ' , new Ext.ContentPanel( ' panel-fund ' , ... {title:'基金',closable:false} ));
layout.getRegion( ' center ' ).showPanel( 0 );
layout.endUpdate();