anchor.diff:    window.onload = function() {
         var selector = $('queryClassSelector');
         addEvent(selector, 'click', handleClassClick);
  +      $('submitClassSelect').disabled = true;
     }
   -->
   </script>
  
positive.code:           </c:forEach>
            </html:select>
            <br/>
            <html:submit>
              <fmt:message key="button.selectClass"/>
            </html:submit>
          </html:form>
  
negative.code:           document.getElementById('queryClassSelect').innerHTML =
                selectedClassName + ":  " + helpText;
            document.getElementById('classSelectDiv').style.display = 'block';
            $('submitClassSelect').disabled = false;
        } else {
            $('classSelectDiv').style.display='none';
        }
  