function switchVis(elem) {
   document.getElementById(elem).style.visibility="hidden";
}

document.addEventListener('load', function(ev) {

if (window.location.href.match(/^.*\.(jpe?g|bmp|gif|png)$/i)) {
  return false ;
}

  var body = document.getElementsByTagName('body')[0] ;
  var div = document.createElement ('div') ;
  var img = document.createElement ('img') ;

  img.src = 'http://www.singerdesign.com/pagerank.php?type=small&url=' + location.href ;
  div.style.position = 'fixed' ;
  div.style.right = '0' ;
  div.style.bottom = '0' ;
  div.id = 'pr';  
  div.onclick = "switchVis('pr')";

  div.appendChild (img) ;
  body.appendChild (div) ;

}, false);