如何使用Javascript列出DOM节点的所有已注册事件?

I can add or remove an event handler for a DOM node. Is it possible to find out all the registered events handlers of a given DOM node? I am referring to straight Javascript meaning no frameworks or toolkits like jquery, dojo, Prototype, GWT, etc. If the answer is no, any reason why? Security issues?I can add or remove an event handler for a DOM