SO

by panchroma

HTML

<div class="nav">
    <a href="#">link 1</a>
    <a href="#">link 2</a>
    <a href="#">link 3</a>
    <a href="#">link 4</a>
    
</div>

CSS

a{
    text-decoration:none;
    color:black;
    margin-right:10px;
    font-size:20px;
}

a:hover, a:active{
    background: url("https://dl.dropboxusercontent.com/u/2665617/bootstrap/images/xxxx.gif") 0 3px
}