anchor.diff:      border: #666 1px solid;
       background-color: #fff;
       padding: 2px;
  -    z-index: 100;
  +    z-index: 200;
       width: 20em;
   }
   
  
positive.code:     position: absolute;
      right: 2px;
      top: 2px;
      z-index: 101;
  	width: 16px;
  	height: 16px;
  	cursor: pointer;
  
negative.code:     right: 2px;
  	top: 2px;
      position: absolute !important;
  	z-index: 100;
  }
  
  div.special_purpose img {
  