.centerMarker{
  position:absolute;
  background:url('http://maps.google.com/mapfiles/ms/icons/red-dot.png') no-repeat;
  top:50%;left:50%;
  z-index:1;
  margin-left:-10px;
  margin-top:-34px;
  height:34px;
  width:20px;
  cursor:pointer;
}