mDocLoaderService = nsnull;
nsPICS::nsPICS(){  NS_INIT_REFCNT();  mPrefs = nsnull;  mPICSElementObserver = nsnull;  mWebShellServicesURLTable = nsnull;//  currentURLList = nsnull;  mDocLoaderService = nsnull;  mPICSRatingsEnabled = PR_FALSE;  mPICSPagesMustBeRatedPref = PR_FALSE;  mPICSDisabledForThisSession = PR_FALSE;  mPICSJavaCapabilitiesEnabled = PR_TRUE;  mPICSTreeRatings = nsnull;  Init();   }