mArtifactsAtTopLevel = 0;
mNonOptionChildren = 0;
nsHTMLSelectElement::nsHTMLSelectElement(PRBool aFromParser){  // DoneAddingChildren() will be called later if it's from the parser,  // otherwise it is  mIsDoneAddingChildren = !aFromParser;  mArtifactsAtTopLevel = 0;  mOptGroupCount = 0;  mOptions = new nsHTMLOptionCollection(this);  NS_IF_ADDREF(mOptions);  mRestoreState = nsnull;  mSelectedIndex = -1;}