(function (jq){
  var ad_container = jq("<div></div>");
  var banner_html=jq(
                  "<a href='http://mortal.bumpin.com/'>"+
                  "<img id='ipw_banner' src='http://mortal.bumpin.com/images/float-ad.png' alt=''/>"+
                  "</a>"+
                  "</div>");
                  
  function animate_scroll(){
      var pos = jq(window).scrollTop();
      ad_container.stop(true).animate({'top': pos+'px'});
  }
  
  jq(document).ready(function(){
      var body = jq("body");
      ad_container.html(banner_html).css({
          'position': 'absolute',
          'z-index': '1000', 
          'top': '0px',
          'right': '2%'
      });
      body.append(ad_container);
      jq(window).scroll(animate_scroll);
      body.scroll(animate_scroll);
  });
})(jQuery);