a.tooltip {
  position: relative;
  z-index: 10;
}
 
a.tooltip span {
  display: none;
  z-index: 10;
}
 
a.tooltip:hover {
  font-size: 100%; /* Fixes bug in IE5.x/Win */
  z-index: 10;
}
 
a.tooltip:hover span {
  display:block;
  position:absolute;
  text-align:left;
  font-size:12px;
  top:1em;
  left:6em;
  padding: 0.2em 0.6em;
  border:1px solid #00bfFf;
  background-color:#e0ffff;
  color:#000;
  width:250px;
  height:110px;
  z-index : 10;
}