$('#tt').datagrid({ title:'Formatting Columns', width:550, height:250, url:'datagrid_data.json', columns:[[ {field:'itemid',title:'Item ID',width:80}, {field:'productid',title:'Product ID',width:80}, {field:'listprice',title:'List Price',width:80,align:'right', formatter:function(val,rec){ if (val < 20){ return '<span style="color:red;">('+val+')</span>'; } else { return val; } } }, {field:'unitcost',title:'Unit Cost',width:80,align:'right'}, {field:'attr1',title:'Attribute',width:100}, {field:'status',title:'Status',width:60} ]] });

var num=2.4445; var number=val.toFixed(2);//格式化,保留两位小数 alert(number);