原型：如何解决Ajax.Responders.register中的参数

I am registering each Ajax call with Ajax.Responders.register of the Prototype framework. The idea was to render an Ajax Spinner if a request is open. But when a request only needs some millis, then I wouldn't show the ajax spinner. But therefore I need the parameters of the request to check for example a flag in the parameters.I am registering each Ajax call with Ajax.Respo