聚焦或滚动面板

Question

我有搜索框给我结果超过20个结果..上一个和下一个按钮我可以去下一个或上一个字符串..但我的页面不会移动..

launch: function () {
    Ext.define('MyViewController', {
        extend: 'Ext.app.ViewController',
        alias: 'controller.myview',

        // This method is called as a "handler" for the change color button in our view
        onnextClick: function () {
            var mypanel = this.lookupReference('mypanel'),
                header = mypanel.getHeader();

            header.setStyle('background-color', '#FFEFBB');
            header.el.down('div.demo-title').setStyle('background-color', '#ccc');
 header.el.down('div.demo-title').focus(); // I want to do like this 

        }
    });

你能告诉我如何设置滚动或窗口焦点吗？