您需要使用带有卡片布局的面板:

You'll want to use a panel with card layout:

var card=new Ext.Panel({
    layout:'card',
    activeItem:0,
    items:[ regionContent , newPanel ]
});

然后该面板可以进入您的视口.要在它们之间切换，您将使用以下内容:

That panel can then go inside your viewport. To switch between them you'll use something like this:

card.getLayout().setActiveItem(1);

看看两个卡片布局的工作示例:http://dev.extjs.com/deploy/dev/examples/layout-browser/layout-browser.html

Take a look at the two card layouts for working examples: http://dev.extjs.com/deploy/dev/examples/layout-browser/layout-browser.html