.sl li a,.sl li a:visited
{
    display: block;
    font-size:1px;
    line-height:0;
    color:#fff;
    width:146px;
    height:28px;
}
.sl li.portfolio a,.sl li.portfolio a:visited
{
    background:url('img/en/portfolio-btn.png') no-repeat 0 0;
}
.sl li.free-scripts a,.sl li.free-scripts a:visited
{
    background:url('img/en/free-scripts-btn.png') no-repeat 0 0;
}
.sl li.project-quote a,.sl li.project-quote a:visited
{
    background:url('img/en/project-quote-btn.png') no-repeat 0 0;
}
.sl li.portfolio a:hover,
.sl li.free-scripts a:hover,
.sl li.project-quote a:hover
{
    background-position:0 -28px;
}