body {
  cursor:crosshair;
  margin:0;
  padding:0;
  position:absolute;
  overflow:hidden;
  background:#000;
  left:0;
  top:0;
  width:100%;
  height:100%;
}
span {
  border-right:#000 solid 1px;
  border-bottom:#000 solid 1px;
  z-Index:0;
  overflow:hidden;
  position:absolute;
}
img {
  position:absolute;
  left:-10000;
}