anchor.diff:      }
       href += objectType + '=' + objectId
       var a = Builder.node("a", {
  -        className: objectType + '-control control',
  +        className: objectType + '-' + controlName + '-control ' + objectType + '-control control',
           id: objectType + "-" + objectId + "-" + controlName,
           href: href
       })
  
positive.code:     var siblings = $A(thisArm.parentNode.getElementsByTagName("LI"))
  
      updateMoveControlVisibility('arm', thisArm.id.split('-')[1], thisArm, siblings)
  }
  
  function updateAllArmsControlVisibility(epochId) {
      $$('#epoch-' + epochId + '-arms li').each(updateArmControlVisibility)
  }
  
  function createStudyControls() {
  
negative.code:     var siblings = $$('div.epoch')
  
      updateMoveControlVisibility('epoch', thisEpoch.id.split('-')[1], thisEpoch, siblings)
      updateDeleteControlVisibility('epoch', siblings)
  }
  
  function updateAllEpochsControlVisibility() {
  