function add_addthis() {

document.write('<script type="text/javascript" src="http://s7.addthis.com/js/200/addthis_widget.js"></script>');
document.write('<script type="text/javascript" >var addthis_config = {services_compact: \'print, email, favorites, digg, delicious, facebook, google, twitter\'};</script>');
document.write('<script type="text/javascript" >var addthis_pub="DC_Bio_P_051109_NNIus-Share";</script>');
document.write('<a onmouseover="return addthis_open(this, \'\', \'[URL]\', \'[TITLE]\')" onclick="return addthis_sendto()" onmouseout="addthis_close()" href="http://www.addthis.com/bookmark.php?v=20"><img style="BORDER-RIGHT: 0px; BORDER-TOP: 0px; BORDER-LEFT: 0px; BORDER-BOTTOM: 0px" height="16" alt="Bookmark and Share" src="http://s7.addthis.com/static/btn/sm-share-en.gif" width="83" /></a>');
}