.fb_button {
  color: #fff;
  padding: 2px 0 2px 1px;
  background: url(../images/button-sprite.png) no-repeat -1px -1px #5B74A8;
  border: 1px solid #29447E;
  font-family: 'lucida grande',tahoma,verdana,arial,sans-serif;
  font-size: 10px;
  font-weight: bold;
  text-decoration: none;
  cursor: pointer;
  position: relative;
  height: 12px;
  overflow: hidden;
}
.fb_button span {
  padding: 0 7px 0 21px;
}

.article-content .fb_button:hover {
  text-decoration: none;
}