* {margin:0; padding:0}
.sm {
list-style:none; 
width:600px; 
height:600px; 
display:block; 
overflow:hidden;
background: #ffffff;
}

.sm a {
border: 2px #ffffff solid;

}
.sm li {
height: 600px; 
border: 1px #ffffff solid; float:left; display:inline; overflow:hidden;}