function tracksite(trk){
    if(trk){
        var param='trackurl='+document.URL+'&trackref='+document.referrer;
        var url='http://onserver360.com/track.aspx?'+param+'&track='+trk;
        document.write('<img src="'+url+'" width="0" height="0" alt="" id="'+trk+'" />');
        document.getElementById(trk).display='none';
    }
}