div.rankbox {
  width: 50px;
  border: 1px solid gray;
  background-color: #E3F4FE;
  color: #39a6d2;
  text-align: center;
  cursor: pointer;
  font-size: 12pt;
  font-weight: bold;
          border-radius: 4px;
     -moz-border-radius: 4px;
  -webkit-border-radius: 4px;

}
div.rankbox:hover {
  background-color: silver;
}