anchor.diff:              <option value="WORDNET" selected="selected">WordNet</option>
               <option value="RANDOMHOUSE">RandomHouse</option>
       <%
  -    } else if ("RANDOMHOUSE".equals(WordLinker.dictionary)) {
  +    } else if (Dictionary.RANDOMHOUSE==WordLinker.getValidDictionary(request.getParameter("dict"))) {
       %>
               <option value="ICIBA">爱词霸</option>
               <option value="YOUDAO">有道</option>
  
positive.code:             <option value="WORDNET">WordNet</option>
              <option value="RANDOMHOUSE">RandomHouse</option>
      <%
      } else if ("CAMBRIDGE".equals(WordLinker.dictionary)) {
      %>
              <option value="ICIBA">爱词霸</option>
              <option value="YOUDAO">有道</option>
  
negative.code:             <option value="WORDNET">WordNet</option>
              <option value="RANDOMHOUSE">RandomHouse</option>
      <%
      } else if (Dictionary.HERITAGE==WordLinker.getValidDictionary(request.getParameter("dict"))) {
      %>
              <option value="ICIBA">爱词霸</option>
              <option value="YOUDAO">有道</option>
  