/* BASIC css start */
.banner-split {
  position:relative;
  display:inline-block;
}
.banner-split img {
  display:block;
}
.banner-split .area {
  position:absolute;
  top:0;
  bottom:0;
  width:50%; 
}
.banner-split .area.left  { left:0; }
.banner-split .area.right { right:0; }

/* BASIC css end */