CaptureMouse(mSplitter->mPresContext, PR_TRUE);
CaptureMouse(mOuter->mPresContext, PR_TRUE);
nsSplitterFrameImpl::MouseMove(nsIDOMEvent* aMouseEvent){    //printf("Mouse move\n");  if (!mPressed)      return NS_OK;    if (IsMouseCaptured(mSplitter->mPresContext))    return NS_OK; // if (mState == Collapsed) //    return NS_OK;  mSplitter->mContent->SetAttribute(kNameSpaceID_None, nsXULAtoms::state, "dragging", PR_TRUE);  RemoveListener();  CaptureMouse(mSplitter->mPresContext, PR_TRUE);  return NS_OK;}