.sqsbchart {
  position:relative;
  text-decoration: none;
  z-index:20;
}

.sqsbchart:hover {
  z-index:21;

}

.sqsbchart img {
  display: none;
}

.sqsbchart:hover img {
  display: block;
  position: absolute;
  border: 1px solid #000;
  background-color: #ffe;
  color: #000;
  font-family: Arial, "Arial MT", "MS Sans Serif", sans-serif;
  font-size: 10px;
  font-weight: normal;
  line-height: 1.3em;
  text-align: center;
  padding: 3px;
  margin: 20px;
  top: 0px;
  left: -100px;
  z-index: 100;

}