mFilePointer      = nsnull; mPagePrintTimer   = nsnull; mPrintDocList     = nsnull;
mPrt              = nsnull; mIsPrinting       = PR_FALSE;
DocumentViewerImpl::DocumentViewerImpl(){  NS_INIT_ISUPPORTS();  mEnableRendering  = PR_TRUE;  mFilePointer      = nsnull;  mPagePrintTimer   = nsnull;  mPrintDocList     = nsnull;}