* {margin:0; padding:0}
.sm {list-style:none; width:700px; height:240px; display:block; overflow:hidden}
.sm li {float:left; display:inline; overflow:hidden}
.bg1 {
background-image: url(/sm/images/01-over.jpg);
width:500px;
height:240px;
}
.bg2 {
background-image: url(/sm/images/02-over.jpg);
width:500px;
height:240px;
}
.bg3 {
background-image: url(/sm/images/03-over.jpg);
width:500px;
height:240px;
}