.rollover {
display: block;
width: 400px;
height: 300px;
background: url(
) no-repeat;
-webkit-transition: all .7s ease-in-out;
-moz-transition: all .7s ease-in-out;
-o-transition: all .7s ease-in-out;
transition: all .7s ease-in-out;
}
.rollover:hover {
background: url(
)
}