anchor.diff:      registerDraggablesAndDroppables()
       showEmptyMessage()
   
  -    //displaying the very fist empty column, that is not shown when no activities is present
  +    // displaying the very fist empty column, that is not shown when no activities is present
       if (currentActivityCount() > 0) {
           var td1Element = document.getElementById("td1")
           var td2Element = document.getElementById("td2")
  
positive.code:     return true;
  }
  
  
  
  function registerHandlers() {
      $$('.input-row td.conditional').each(function(cell) {
          var input = cell.getElementsByTagName("INPUT")[0]
  
negative.code:     });
      Event.observe('add-activity-button', 'click', addActivityRow)
      Event.observe('add-activity-button', 'click', resetActivitiesAutocompleter)
      Event.observe('return-to-template', 'click', function() {
          location.href='<c:url value="/pages/cal/template?studySegment=${studySegment.id}&study=${study.id}&amendment=${study.developmentAmendment.id}"/>'
      })
  }
  
  function makeCellDraggableAndDroppable(input) {
  