easyui datagrid 分页

//初始化dategrid
$('#tt').datagrid({
    url:null,
    pagination:true,
    pageSize:,
    pageNumber:,
    rownumbers:true
});
$('#tt').datagrid('getPager').pagination({
    displayMsg:'当前显示从 [{from}] 到 [{to}] 共[{total}]条记录',
    onSelectPage : function(pPageIndex, pPageSize) {
        //改变opts.pageNumber和opts.pageSize的参数值，用于下次查询传给数据层查询指定页码的数据
        var gridOpts = $('#tt').datagrid('options');
        gridOpts.pageNumber = pPageIndex;
        gridOpts.pageSize = pPageSize;
        //定义查询条件
        var queryCondition = {name:"世纪之光"};
        //异步获取数据到javascript对象，入参为查询条件和页码信息
        var oData = getAjaxDate("orderManageBuz","qryWorkOrderPaged",queryCondition,gridOpts);
        //使用loadDate方法加载Dao层返回的数据
        $('#tt').datagrid('loadData',{"total" : oData.page.recordCount,"rows" : oData.data});
    }
});