#social {
    position: fixed;
    top: 150px;
    left: 0;
    overflow:hidden;
    width:24px;
    height:330px;
    opacity: 0.55;
    background: #F3F8FC;
    padding: 6px 6px 0;
  border: 1px solid #CFDEEF;
  border-left: none;
    -webkit-border-radius: 0 5px 5px 0;
    -moz-border-radius: 0 5px 5px 0;
    border-radius: 0 5px 5px 0;
    -webkit-box-shadow: inset -1px 1px 0 #FFF, inset 0 -1px 0 #FFF;
    -moz-box-shadow: inset -1px 1px 0 #FFF, inset 0 -1px 0 #FFF;
    box-shadow: inset -1px 1px 0 #FFF, inset 0 -1px 0 #FFF;
}
#social_block {
    position: absolute;
    
}
#social:hover {
    opacity: 1;
}
#social a {
    float: left;
    width: 24px;
    height: 24px;
    margin: 0 6px 6px 0;
}

<script type="text/javascript" src="/js/social.js"></script>
<div id="social"><div id="social_block"><script type="text/javascript">social();</script></div></div>