code: function(result){
              var event = {
                  req:options,
                  res:result,
                  cnf:conf
              };
              // check post handler
              if (_u._$isFunction(conf.post)){
                  conf.post.call(this,event);
              }
              dispatch.call(this,'post',event);
              if (!!event.error){
                  onerror.call(this,event.error);
                  return;
              }
              // check global format handler
              if (_u._$isFunction(conf.format)){
                  conf.format.call(this,event);
              }
              dispatch.call(this,'format',event);
              // callback
              var callback = options.onload||conf.onload;
              if (event.result!=null){
                  result = event.result;
              }
              if (_u._$isFunction(callback)){
                  callback.call(this,result);
              }else if(_u._$isString(callback)){
                  this._$dispatchEvent(callback,result);
              }
              // finally action
              if (_u._$isFunction(conf.finaly)){
                  conf.finaly.call(this,event);
              }
          }
docs: onload event