.hidden_tooltip {
  display: none;
}

span.visible_tooltip {
  display: block;
  position: absolute;
  top: 10px;
  left: 21px;
  width: 300px;
  font-size: 9px;;
  padding-left: 5px;
  padding-right: 5px;
  border: 1px solid black;
  background-color: #FFFFCC;
  text-decoration: none;
  color: #000000;
  z-index: 10;
}

a {
  text-decoration: none;
}

span {z-index =100;
  
}

img, table {
  z-index: 1;
}

.tooltipSource {
  position: relative;
}