anchor.diff:  
   <form action="display.jsp" style="display: inline; margin: 0;">
   <input type="hidden" name="type" value="1"/>
  -<input type="submit" name="all" value="search simple">
  +<input type="submit" name="all" value="search analyzing">
   <textarea rows="4" cols="40" name="searchme"></textarea>
   </form>
   
  
positive.code: 
  <form action="display.jsp" style="display: inline; margin: 0;">
  <input type="hidden" name="type" value="2"/>
  <input type="submit" name="all" value="search analyzing">
  <textarea rows="4" cols="40" name="searchme"></textarea>
  </form>
  
  
negative.code: 
  <form action="display.jsp" style="display: inline; margin: 0;">
  <input type="hidden" name="type" value="lucene2"/>
  <input type="submit" name="all" value="search similar">
  <textarea rows="4" cols="40" name="searchsimilar"></textarea>
  </form>
  
  