anchor.diff:                  document.forms[0].role.focus();
               }
           </script>
  +
  +        <p>Headers:</p>
  +        <c:catch>
  +            <table style="font-family: monospace">
  +                <c:forEach var="h" items="${header}">
  +                    <tr><td><c:out value="${h.key}"/></td><td><c:out value="${h.value}"/></td></tr>
  +                </c:forEach>
  +            </table>
  +        </c:catch>   
  +
  +        <p>Request attributes: </p>
  +        <table style="font-family: monospace">
  +            <c:forEach var="a" items="${requestScope}">
  +                <tr><td><c:out value="${a.key}"/></td><td><c:out value="${a.value}"/></td></tr>
  +            </c:forEach>
  +        </table>
  +
  +        <p>Page context: </p>
  +        <table style="font-family: monospace">
  +            <c:forEach var="a" items="${pageScope}">
  +                <tr><td><c:out value="${a.key}"/></td><td><c:out value="${a.value}"/></td></tr>
  +            </c:forEach>
  +        </table>
       </body>
   </html>
  
positive.code: <html>
      <head>
          <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
          <meta http-equiv="refresh" content="2">
          <title>Autorisatie info</title>
      </head>
      <body>
  
negative.code:         Lijst met roles:
          <ol>
              <c:if test="${pageContext.request.userPrincipal != null}" >
                  <c:catch>
                      <c:forEach var="r" items="${pageContext.request.userPrincipal.groups}">
                          <li><c:out value="${r.name}"/></li>
                      </c:forEach>
                  </c:catch>
                  <c:catch>
                      <c:forEach var="r" items="${pageContext.request.userPrincipal.roles}">
                          <li><c:out value="${r}"/></li>
                      </c:forEach>
                  </c:catch>
              </c:if>
          </ol>
          <p>
          Test HttpServletRequest.isUserInRole():
          <p>
          <c:if test="${!empty param.role}">
              Rol <b><c:out value="${param.role}"/>: <%= request.isUserInRole(request.getParameter("role")) %></b>
              <p>
          </c:if>
          <form action="${pageContext.request.pathInfo}" method="get">
  