CSS:

#skyline {
    background: url(https://data.bugabuse.net/images/skinden/mint/fb-tc.png);
    position: relative;
}
  #skyline li {
    margin: 0; padding: 0; list-style: none;
    position: absolute; top: 0;}
  #skyline #panel1b {
    background-position: 0 -79px; width: 29px; height: 29px;}
  #skyline #panel2b {
   background-position: 0 0; width: 29px; height: 29px;}


HTML:

  <ul id="skyline">
    <li id="panel1b"><a href="http://tinychat.com/flaminflash"></a></li>
    <li id="panel2b"><a href="https://www.facebook.com/BugabuseDotNet"></a></li>
</ul>