.index-boxes-nav { position: relative; list-style: none; margin: 0; padding: 0; }  
.index-boxes-nav li { display: block; overflow: hidden; padding: 0; float: left; height: 232px; background-image:url(../graphics/index_only/index_boxes.jpg); text-indent: -9999px; width: 380px; margin: 0; }  
.index-boxes-nav a { display:block; height:232px; text-indent:-9999px; width: 380px; cursor: pointer; }

#box-left { background-position: 0 0; }
#box-right { background-position: -380px 0; }
#box-left.active, #box-left:hover { background-position: 0 -232px; }
#box-right.active, #box-right:hover { background-position: -380px -232px; }