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;    }