span.bubble {
  /*z-index: 0;*/
  position: relative;
  padding: 0px 8px;
  background-repeat: no-repeat;
  background-image: url(../img/small/bubble.png);
  //background-image: url(../img/small/bubble.gif);
}

span.bubble div { 
  position: absolute;
  top: 18px;
  left: -120px;
  z-index: 1;
  display: none;
  color: #333;
  border: 2px solid #aaa;
  padding: 12px 16px 12px 60px;
  background-image: url(../img/big/information.png);
  //background-image: url(../img/big/information.gif);
  background-repeat: no-repeat;
  background-color: #eeeeee;
  background-position: 12px center;
  width: 350px;
  font-size: 10pt;
  font-style: serif;
  border-radius: 0.3em;
  -moz-border-radius: 0.3em;
}

span.bubble:hover div {
  display: block;
  /*z-index: 5;*/
}