tabzilla.css

#tabzilla {
  float: right;
  position: relative;
}

#tabzilla a {
  text-indent: 120%;
  white-space: nowrap;
  overflow: hidden;
  background-image: url('images/tabzilla-static.png');
  background-repeat: no-repeat;
  display: block;
  height: 37px;
  position: relative;
  width: 147px;
  z-index: 2;
  box-shadow: none;
}

@media (-webkit-min-device-pixel-ratio: 1.5), (min--moz-device-pixel-ratio: 1.5), (-o-min-device-pixel-ratio: 3/2), (min-resolution: 1.5dppx) {
  #tabzilla a {
    background-image: url('images/tabzilla-static-high-res.png');
    background-size: 147px 37px;
  }
}

#tabzilla:before {
  background-color: transparent;
  content: '';
  display: block;
  height: 26px;
  left: 28px;
  position: absolute;
  top: 0;
  width: 88px;
  z-index: 1;
}