anchor.diff:  
   <%
       request.setAttribute("toolname", "Article/editor intersection (beta)");
  +
  +    String wikiparam = request.getParameter("wiki");
  +    if (wikiparam == null)
  +        wikiparam = "en.wikipedia.org";
  +    else
  +        wikiparam = ServletUtils.sanitizeForAttribute(wikiparam);
   
       String mode = request.getParameter("mode");
       if (mode == null)
  
positive.code: </form>
  
  <%
      Wiki wiki = Wiki.createInstance("en.wikipedia.org");
      wiki.setMaxLag(-1);
      wiki.setQueryLimit(1500);
  
  
negative.code: <form action="./editorintersection.jsp" method=POST>
  <table>
  <tr>
      <td colspan=2>Wiki:
      <td><input type=text name=wiki value="<%= wikiparam %>" required>
  <tr>
      <td><input type=radio name=mode id="radio_cat" value="category"<%= mode.equals("category") ? " checked" : "" %>>
      <td>Category:
      <td><input type=text id=category name=category <%= mode.equals("category") ? "value=\"" + category + "\" required" : "disabled"%>>
  