$(function(){
            $('#tt').datagrid({
                url: 'datagrid_data3.json',
                title: 'DataGrid',
                width: 700,
                height: 220,
                fitColumns: true,
                nowrap:false,
                rownumbers:true,
                showFooter:true,
                columns:[[
                    {field:'itemid',title:'Item ID',width:80},
                    {field:'productid',title:'Product ID',width:120},
                    {field:'listprice',title:'List Price',width:80,align:'right'},
                    {field:'unitcost',title:'<span class="txtleft">Unit</span> 

Cost',width:80,align:'right'},
                    {field:'attr1',title:'Attribute',width:250},
                    {field:'status',title:'Status',width:60,align:'center'}
                ]],
onLoadSuccess:function(data){
$(".txtleft").parent().parent().css("text-align","left");sss
}
            });
        });