Getting Javascript from the DOM (re-post)

[Tom Lee]

Hi ,

I read a couple articles regarding the calling of java script functionality
from C++., and I was wondering if anybody could possible help me out .

I have  an XUL toolbar (Netscape 7.x) that calls an XPCom component ( C++).
I need to be able to call a JavaScript function that may or may not be
present within the document - from my XPCOM component. I have tried several
ways, but I cannot seem to get the JavaScript within the document. I have
done this with a plug-in for IE and it works like a charm. The way I do it
in IE is listed below. I have tried several different ways to try to get the
java script and have failed:( I would greatly appreciate some insight to
this. Am I making this too complicated? Any
help you could offer  I would greatly appreciate.

Thank you very much,



...

   CComQIPtr<IWebBrowser2> spBrowser(pDispatch);

   VARIANT_BOOL b = VARIANT_FALSE;
   spBrowser->get_TopLevelContainer(&b);

    CComPtr<IDispatch> pDisp;
    spBrowser->get_Document(&pDisp);

    CComQIPtr<IHTMLDocument2> spDoc(pDisp);

//    GetDomain(pDisp);
    CComPtr<IDispatch> pScriptDisp;
    HRESULT hr = spDoc->get_Script(&pScriptDisp);

    if(pScriptDisp)
    {
     _bstr_t btMember(JSCRIPT_FUNCTION);
     DISPID dispid = NULL;

     BSTR bstrFunction = btMember.copy();

     hr = pScriptDisp->GetIDsOfNames(IID_NULL,&bstrFunction,1,
           LOCALE_SYSTEM_DEFAULT,&dispid);

     // Check to see if function exists
     if(FAILED(hr))
      return;

     int arraySize = 0;
     DISPPARAMS dispparams;
     ZeroMemory(&dispparams, sizeof(DISPPARAMS));
     dispparams.cArgs = arraySize;
     dispparams.rgvarg = new VARIANT[dispparams.cArgs];

     for( int i = 0; i < arraySize; i++)
     {
//      CComBSTR bstr = paramArray.GetAt(arraySize - 1 - i); // back reading
//      bstr.CopyTo(&dispparams.rgvarg[i].bstrVal);
//      dispparams.rgvarg[i].vt = VT_BSTR;
     }
     dispparams.cNamedArgs = 0;

     EXCEPINFO excepInfo;
     ZeroMemory(&excepInfo, sizeof(EXCEPINFO));
        CComVariant vaResult;
     UINT nArgErr = (UINT)-1;  // initialize to invalid arg

     hr = pScriptDisp->Invoke(dispid,IID_NULL,0,
           DISPATCH_METHOD,
           &dispparams,
           &vaResult,
           &excepInfo,&nArgErr);

     delete [] dispparams.rgvarg;

     if(SUCCEEDED(hr) && SUCCEEDED(excepInfo.scode))
     {
      _bstr_t b(vaResult.bstrVal, true);