怎么在分页工具栏上加按钮

我先在分页工具栏增加一个按钮,要扩展吗?

[code="js"] bbar: new Ext.PagingToolbar({
pageSize: 25,
store: store,
displayInfo: true,
displayMsg: 'Displaying topics {0} - {1} of {2}',
emptyMsg: "No topics to display",
items:[
text:'新增的按钮
}]
})[/code]

官方有示例

[quote]我先在分页工具栏增加一个按钮,要扩展吗?[/quote]
直接加就是了..

[code="java"]Ext.onReady(function(){
Ext.QuickTips.init();

    var data =[ ['rowen','hohai','basketball','2004-11-01'],
                ['yyy','hohai','football','2004-01-11'],
                ['ysc','hohai','pingpong','2004-01-21'],
                ['yww','hohai','pingpong','2004-01-31']
              ];
    var reader=new Ext.data.ArrayReader({},
        [{name:'name'},{name:'school'},{name:'sport'},{name:'year',type:'date',dateFormat:'Y-m-d'},{name:'desc'}]
    );
    var store =new Ext.data.Store({
        data:data,
        reader:reader,
        sortInfo:{field:'name',direction:'desc'}
    });


    var sm = new Ext.grid.CheckboxSelectionModel();
    var cm =new Ext.grid.ColumnModel([new Ext.grid.RowNumberer(),sm,
    {header:'姓名',sortable:true,width:160,dataIndex:'name'},
    {header:'入学年份',sortable:true,width:160,dataIndex:'school',editor: new Ext.form.TextField({   
           allowBlank: false 
       })},
    {header:'运动爱好',sortable:true,width:160,dataIndex:'sport'},
    {header:'入学年份',sortable:true,width:160,dataIndex:'year',renderer: Ext.util.Format.dateRenderer('Y-m-d')}
    ]);

    grid =new Ext.grid.GridPanel({
        title:'groupGrid',
        store:store,
        cm:cm,
        width:600,
        height:500,
        frame:true,
        //draggable :true,
        enableDragDrop:true,
        sm:sm,
        viewConfig: {
        forceFit:true
        },

        //animCollapse:true,
        collapsible:true,
        // inline toolbars
    tbar:[{
        text:'Add Something',
        tooltip:'Add a new row',
        iconCls:'add',
        handler:function(){
            alert("Add Something");
        }
    }, '|', {
        text:'Options',
        tooltip:'Blah blah blah blaht',
        iconCls:'option'
    },'|',{
        text:'Remove Something',
        tooltip:'Remove the selected item',
        iconCls:'remove'
    }],
        renderTo:document.body,

    bbar:new Ext.PagingToolbar({ 
    pageSize:2, 
    store:store, 
    displayInfo:true, 
    displayMsg:'显示第{0}到第{1}条记录，一共{2}条', 
    emptyMsg:"没有记录",
    items:[{text:'分页栏的按钮',handler:function(){alert("你点击了此按钮");}}]
    }) 
    });

});[/code]