var bmoff = new Image(); bmoff.src = "img/bookmark.gif";
  var bmon = new Image(); bmon.src = "img/bookmark2.gif";

document.write("<div align=right>");

if ((navigator.appVersion.indexOf("MSIE") > 0)
  && (parseInt(navigator.appVersion) >= 4)){
document.write("&nbsp;<span style='cursor:hand;' title='bookmark this page' onclick='window.external.AddFavorite(location.href, document.title);' onmouseover='document.images.bm.src = bmon.src; return true' onmouseout='document.images.bm.src = bmoff.src; return true'><img border=0 src='img/bookmark.gif' name='bm'></span>");
}

document.write("</div>");