.yui-skin-sam .yui-navset .yui-nav, 
.yui-skin-sam .yui-navset .yui-navset-top .yui-nav { 
    border-color:#aaa; 
} 



.yui-skin-sam .yui-navset .yui-nav .selected a, 
.yui-skin-sam .yui-navset .yui-nav .selected a em {
    border-color: #888;
}

.yui-skin-sam .yui-navset .yui-nav .selected a, 
.yui-skin-sam .yui-navset .yui-nav .selected a:focus, /* no focus effect for selected */ 
.yui-skin-sam .yui-navset .yui-nav .selected a:hover { /* no hover effect for selected */ 
    background:#ccc url(http://yui.yahooapis.com/2.5.2/build/assets/skins/sam/sprite.png) repeat-x 0% -100px; /* selected tab background */ 
    color:#000; 
    border-color: #888;
} 


.yui-skin-sam .yui-navset .yui-content { 
    background:#f5f5f5; /* content background color */ 
}