Capturing JavaScript Events ?

[Andy B.]

Can anyone help?

I'm trying to install an event handler to catch JavaScript events.
Using the mfcembed example I've tried a number of permutations but none
work.

How I thought it might work is :-

#include "nsIJSEventListener.h"
#include "nsIDOMEventListener.h"

class CBrowserImpl : public nsIInterfaceRequestor,
   public nsIEmbeddingSiteWindow,
   .....
   public nsIDOMEventListener,
   public nsIJSEventListener,
   public nsSupportsWeakReference
{
public:
    CBrowserImpl();
    ~CBrowserImpl();
    NS_METHOD Init(PBROWSERFRAMEGLUE pBrowserFrameGlue,
                   nsIWebBrowser* aWebBrowser);

    NS_DECL_ISUPPORTS
    NS_DECL_NSIINTERFACEREQUESTOR
    NS_DECL_NSIEMBEDDINGSITEWINDOW
 .........
 NS_DECL_NSIDOMEVENTLISTENER
 NS_IMETHOD GetEventTarget(nsIScriptContext** aContext, nsISupports**
aTarget);
 NS_IMETHOD SetEventName(nsIAtom* aName);
 ......
}

nsresult CBrowserImpl::SetEventName(nsIAtom* aName)
{
 ......
  return NS_OK;
}

NS_IMETHODIMP CBrowserImpl::GetEventTarget(nsIScriptContext**aContext,
                                  nsISupports** aTarget)
{
 .......
  return NS_OK;
}

NS_IMETHODIMP CBrowserImpl::HandleEvent(nsIDOMEvent *event)
{
 ....
  return NS_OK;
}

but - the callbacks are never called.

What is the correct method for capturing JavaScript events "outside" of the
scripts themselves ?

Many thanks
...Andy B.