#cf2 {
    height: 293px;
    left: 0px;
    margin: 0 auto;
    padding-left: 15px;
    padding-right: 15px;
}

#cf2 img {
    position: absolute;
    left: 0;
    -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;
}

#cf2 img.transparent {
    opacity: 0;
}        

img {
    width: 100%;
    height: auto;
}