var myGetFeaturesByIDsService = new SuperMap.REST.GetFeaturesByIDsService(url, { eventListeners: { "processCompleted": getFeatureCompleted, "processFailed": getFeatureError } }); myGetFeaturesByIDsService.processAsync(getFeatureByIDsParams); myGetFeaturesByIDsService.name = "zhang"; function getFeatureCompleted(GetFeaturesEventArgs){ //todo var t = this.name; }; function getFeatureError(GetFeaturesEventArgs){//todo}