Javascript easyui数据网格样式器列

我有一个带有easyui的datagrid，我动态地创建头部，因为它们依赖于我的数据库。我的头球已经打对了。这是传递给datagrid的json对象

[[
  {"field": "status","title": "Estatus","align": "center","rowspan": "2"},
  {"field": "Numero","title": "Orden","align": "center","rowspan": "2"},
  {"field": "FechaRegistro","title": "Fecha","align": "center","rowspan": "2"},
  {"field": "T1","title": "00:02:00","align": "center"},
  {"field": "T2","title": "00:24:00","align": "center"},
  {"field": "T3","title": "00:04:00","align": "center"},
  {"field": "T4","title": "02:00:00","align": "center"},
  {"field": "Cierre","title": "Fecha y Hora<br \/>de Cierre","align": "center","rowspan": "2"}
    ],[
  {"field": "P1","title": "Informacion <br\/>tecnica para <br\/>aprobacion","align": "center","styler": "formatColor"},
  {"field": "P2","title": "Aprobacion de<br\/> Informacion<br\/>Tecnica cliente","align": "center","styler": "formatColor"},
  {"field": "P3","title": "Informacion<br\/>Tecnica de<br\/>Proceso","align": "center","styler": "formatColor"},
  {"field": "P4","title": "Compra y<br\/>Recepcion de<br\/>Materiales","align": "center","styler": "formatColor"}
]]

但是我在我的控制台中得到了这个错误

Uncaught TypeError: col.styler is not a function

我的网格每秒都会被一个查询填充，在P1、P2、P3、P4列中有一些时间，T1、T2、T3、T4只是该列应该花费的确定时间。因此，我试图使，如果我的列值高于它将成为红色背景。我已经设法在小提琴上实现了这一点，问题是这里的标题不是动态加载的，这就是它不起作用的原因（从我所看到的）这里是小提琴

这就是我设置标题的方式

function RefreshHeaders(){
    $.ajax({            
        url:"includes/getHeader.php",
        cache: false,
        timeout: 5000,   
        async: true,    
        success: function(data){
         //console.log(data);
         var objekJSON=jQuery.parseJSON(data);       
         $('#dg').datagrid({
         fit:true,
         fitColumns:false,
         columns:objekJSON,
         url:"includes/Get_Orders.php"
         });
         }
     });


    }

---

谢谢，

能否提供更多代码，特别是关于getHeader.php的代码，以及如何将数据转换为JSON格式？在什么位置调用函数？

function RefreshHeaders(){
    $.ajax({            
        url:"includes/getHeader.php",
        cache: false,
        timeout: 5000,   
        async: true,    
        success: function(data){
         //console.log(data);
         var objekJSON=jQuery.parseJSON(data);       
         $('#dg').datagrid({
         fit:true,
         fitColumns:false,
         columns:objekJSON,
         url:"includes/Get_Orders.php"
         });
         }
     });


    }