html, body {
  margin: 0px;
  padding: 0px;
  background: #4e6bce;
  color: inherit;
  text-align: center;
  width: 100%;
  height: 100%;
}

#bg_gora {
  position: absolute:
  top: 50%;
  left: 0px;
  height: 50%;
  background: #0b216e;
  color: inherit;
  z-index: 1;
}

#bg_dol {
  position: absolute:
  top: 50%;
  left: 50%;
  height: 50%;
  background: #4e6bce;
  color: inherit;
  z-index: 1;
}

#flash {
  position: absolute;
  height: 551px;
  width: 767px;
  top: 50%;
  left: 50%;
  margin-top: -275px;
  margin-left: -383px;
  z-index: 100;
}

#flash_bg {
  position: absolute;
  height: 551px;
  width: 100%;
  top: 50%;
  left: 0px;
  margin-top: -275px;
  z-index: 50;
  background: url('../pliki/tlo.jpg') repeat-x;
}