Ajax.request factory

[stricte]

Hi,

i need help with my code. I want to build a Ajax.request factory, so:

MyApp.ajax_request = function(config){

   successfn = function(result, request){
       jsonData = Ext.util.JSON.decode(result.responseText);
       if(jsonData.success === true){
           config.successfn; //important. here i want to run function passed in config.
       }
       else{
         if(jsonData.error == 'TIMEOUT'){
             Ext.Msg.show({
                 title: 'Błąd - ' + jsonData.error,
                 msg: jsonData.msg,
                 buttons: Ext.MessageBox.OK,
                 fn: function(){ window.location = '/' }
             });
         }
         else if(jsonData.error == 'NOT_LOGGED'){
             Ext.Msg.show({
                 title: 'Błąd - ' + jsonData.error,
                 msg: jsonData.msg,
                 buttons: Ext.MessageBox.OK,
                 fn: function(){ window.location = '/' }
             });
         }
         else{
             Ext.Msg.alert('Błąd - ' + jsonData.error, jsonData.msg);
         }
       }
   }

  failurefn = function(result, request){
       Ext.Msg.alert('error', 'error msg');
   }


  Ext.Ajax.request({
      url: config.url,
      params: config.params,
      success: successfn,
      failure: failurefn
  });
}

As I mentioned, I want to pass in config function which will be fired in success callback:

config = {
               url: '/operators/new',
               successfn: function(){
                  //some code to run, but never will. why?
               },
               params: {data: Ext.encode(nops)}
             };
MyApp.ajax_request(config);

My question is how to pass function which will be trigered as is in my Ajax.request?

[hendricd]

 if(jsonData && jsonData.success === true){
      if(Ext.isFunction( config.successfn )){
          config.successfn(jsonData); //important. here i want to run function passed in config.
     }
 }