function trace_log()
{
  if( accountCode != "" )
  {   
    var sc=document.createElement('script');
    sc.type='text/javascript';
    sc.id='tnztrace';
    sc.src="http://www.tnz.co.nz/trace-log/trace.php?accountCode="+accountCode+"&pageURL="+encodeURIComponent(location.href)+"&pageReferrer="+encodeURIComponent(document.referrer);
    document.getElementsByTagName('head')[0].appendChild(sc);
  }
}

var accountCode = null;

function trace()
{
    if( window.addEventListener)
    {
        window.addEventListener('load', trace_log, false);
    }
    else if( window.attachEvent )
    {
        window.attachEvent('onload', trace_log);
    }
}