protected void visitingURL(String url){
  if (trackVisitedURLs) {
    if (visitedURLs == null) {
      visitedURLs=new Vector();
    }
    if (!visitedURLs.contains(url)) {
      visitedURLs.addElement(url);
    }
  }
}

protected void visitingURL ( String url ) { if ( trackVisitedURLs ) { if ( visitedURLs == null ) { visitedURLs = new Vector ( ) ; } if ( ! visitedURLs . contains ( url ) ) { visitedURLs . addElement ( url ) ; } } }
this method can be invoked to indicate a url was visited fro tracking
