#nav a, #nav a:visited { display:block; } #nav a:hover, #nav a:active { background:url(images/tab-right.jpg) no-repeat 100% 1px; float:left; } #nav a span { float:left; display:block; } #nav a:hover span { float:left; display:block; background: url(images/tab-left.jpg) no-repeat 0 1px; }