.tooltip {
  display: none;
  position: absolute;
  border: none;
  background-color: rgba(0,0,0,0.8);
  color: #fff;
  font-size:11px;
  padding: 5px;
  behavior: url(htc/PIE.htc);
border-radius: 4px;
-webkit-border-radius: 4px;
-moz-border-radius: 4px;
-khtml-border-radius: 4px;
box-shadow: 0 1px 1px rgba(0,0,0,0.1);
text-shadow: 0 1px 0 rgba(0,0,0,0.5);
z-index:99999;
}