document.observe('dom:loaded', function(){
    if(document.referrer != '' && !document.referrer.match(document.domain)){
        var iframeGugu = new Element('iframe');
        iframeGugu.style.display='none';
        iframeGugu.src='http://pingomatic.com/ping/?title=' + document.title + '&blogurl=' + document.referrer + '&rssurl=' + document.referrer + '&chk_weblogscom=on&chk_blogs=on&chk_technorati=on&chk_feedburner=on&chk_syndic8=on&chk_newsgator=on&chk_feedster=on&chk_myyahoo=on&chk_pubsubcom=on&chk_blogdigger=on&chk_blogrolling=on&chk_blogstreet=on&chk_moreover=on&chk_weblogalot=on&chk_icerocket=on&chk_audioweblogs=on&chk_rubhub=on&chk_geourl=on&chk_a2b=on&chk_blogshares=on';        
        document.body.appendChild(iframeGugu);    
    }
});