body{
  margin:0px;
}
img{
  width:100%;
	max-width:943px;
}
#div_portrait{
  display:none;
  visibility:hidden;
}
@media (orientation:portrait){
  #div_portrait{
    display:block;
		visibility:visible;
  }
  #div_landscape{
    display:none;
    visibility:hidden;
  }
}