Extjs:添加查看全部按钮

    var grid =new Ext.grid.GridPanel({renderTo:'tsllb',title:'产品成本列表',selModel:csm,height:350,columns:[csm,{header: "编码", dataIndex: "bm", sortable: true,hidden:true},{header: "产品", dataIndex: "cp", sortable: true},{header: "成本", dataIndex: "cb", sortable: true,align:'left'}],store:store,tbar:new Ext.PagingToolbar({id:'bbar',emptyMsg:"没有数据",displayInfo:true,displayMsg:"显示从{0}条数据到{1}条数据，共{2}条数据",store:store,pageSize:50}),bbar:[{pressed: true,enableToggle:true,text: '查看全部',toggleHandler: function(btn, pressed){search(10000);}}]
});

    var search = function(pageSize){store.load({params:{start:0,limit:pageSize,param:param}});Ext.getCmp("bbar").pageSize=pageSize;}