nsIDOMHTMLFrameElement* frameElem = nsnull;
nsHTMLFrameOuterFrame::Init(nsIPresContext&  aPresContext,                            nsIContent*      aContent,                            nsIFrame*        aParent,                            nsIStyleContext* aContext,                            nsIFrame*        aPrevInFlow){  // determine if we are a <frame> or <iframe>  nsIDOMHTMLFrameElement* frameElem = nsnull;  if (aContent) {    aContent->QueryInterface(kIDOMHTMLIFrameElementIID, (void**) &frameElem);    mIsInline = (frameElem) ? PR_TRUE : PR_FALSE;    NS_IF_RELEASE(frameElem);  }  return nsHTMLFrameOuterFrameSuper::Init(aPresContext, aContent, aParent,                                          aContext, aPrevInFlow);}