.fb_share_link
{
    padding: 2px 0 0 20px;
    height: 16px;
    background: url(http://static.ak.fbcdn.net/images/share/facebook_share_icon.gif?6:26981) no-repeat left;
}
.ms_share_link
{
    padding: 2px 0 0 20px;
    background: url(http://cms.myspacecdn.com/cms/post_myspace_icon.gif) no-repeat left;
}