#social_side_links {
    position: fixed;
    top: 100px;
    left: 0;
    padding: 10px;
    background: #555;
    background: -webkit-gradient(linear, left top, left bottom, from( #555 ), to( #111 ), color-stop( 50%, #444 ), color-stop( 50%, #333 ));
    background: -webkit-linear-gradient(#555, #444 50%, #333 50%, #111);
    background: -moz-linear-gradient(#555, #444 50%, #333 50%, #111);
    background: -ms-linear-gradient(#555, #444 50%, #333 50%, #111);
    background: -o-linear-gradient(#555, #444 50%, #333 50%, #111);
    background: linear-gradient(#555, #444 50%, #333 50%, #111);
    border-width: 2px 2px 2px 0;
    border-style: solid;
    border-color: #777 #888 #999;
    -webkit-border-top-right-radius: 6px;
    -moz-border-top-right-radius: 6px;
    border-top-right-radius: 6px;
    -webkit-border-bottom-right-radius: 6px;
    -moz-border-bottom-right-radius: 6px;
    border-bottom-right-radius: 6px;
    -webkit-box-shadow: #888 7px 0 10px -5px;
    -moz-box-shadow: #888 7px 0 10px -5px;
    -o-box-shadow: #888 7px 0 10px -5px;
    box-shadow: #888 7px 0 10px -5px;
}
#social_side_links li a {
    display: block;
    background-repeat: no-repeat;
    background-position: top left;
}
#social_side_links li a img {
    -webkit-transition:  opacity .2s ease-in-out;
    -moz-transition:  opacity .2s ease-in-out;
    -o-transition:  opacity .2s ease-in-out;
    transition:  opacity .2s ease-in-out;
}
#social_side_links li a:hover img {
    opacity: 0;
}
#social_side_links li a:active img {
    opacity: 1;
}
#social_side_links li:first-child {
    background-image: url('/images/twitter.png');
}
#social_side_links li:nth-child(2) {
    background-image: url('/images/facebook.png');
}
#social_side_links li:nth-child(3) {
    background-image: url('/images/linkedin.png');
}
#social_side_links li:nth-child(4) {
    background-image: url('/images/digg.png');
}
#social_side_links li:nth-child(5) {
    background-image: url('/images/youtube.png');
}