.shuffle {

    position: fixed;

    top: 3px;

    left: 3px;

    margin: 0;

    padding: 0;

    _position: static;

    _margin: 3px;

    _text-align: right;

    z-index: 1;

}

.shuffle a img {

    border: 0;

}

 

 

 

 

<script type="text/javascript">

function shuffle() {

  var s1='<p class="shuffle"><a href="http://YOUR-TUMBLR-NAME.tumblr.com/';

  var s2='</a></p>';

  Total=0+64;

  if(Total>0) {

      var r=Math.ceil(Math.random() * Total);

      document.write(s1+'page/'+r+'">'+'<img src="http://data.tumblr.com/OY9NpboAI1s7qus3Dvw52nRC_500.png" width="70" height="20">'+s2);

  }

}

shuffle();

</script>