body { 
  text-align: center; 
  height: 100%;
  font: 10px arial;
  background-color: #FFFFFF;
}

a img {border: 0;}

#wrapper {
  position: relative;
  margin:0 auto;
  text-align:left;
  width: 800px;
}

#index {
  position: absolute;
  top: 25px;
  left: 0px;
  width: 800px;
  height: 500px;
  font: 0px arial;
  z-index: 10;
}
  
#ad {
  text-align: center;
  background: white;
  position: absolute;
  top: 85%;
  left:0px;
  width: 100%;
  height:90px;
}