HTML, CSS and JavaScript playground

<!DOCTYPE html>
<html>
<head>
<style>

#cfnormal {
  position:relative;
  height:281px;
  width:450px;
  margin:0 auto;
}

#cfnormal img {
  position:relative;
  height:281px;
  width:450px;
  margin:0 auto;
}

#cf {
  position:relative;
  height:10px;
  width:450px;
  margin:0 auto;
}

#cf img {
  position:absolute;
  left:0;
  width:450px;
  -webkit-transition: opacity 1s ease-in-out;
  -moz-transition: opacity 1s ease-in-out;
  -o-transition: opacity 1s ease-in-out;
  transition: opacity 1s ease-in-out;
}

</style>

<body>

</body>
</html>