function cTrack(v)
{
  //var url = "http://"+top.location.host + "/";
   return '<img src= "cTrack.php?r=' + urlencode(v) + '" style="float:left;" width=0 height=0>';	
}

function urlencode(str) {
return escape(str).replace(/\+/g,'%2B').replace(/%20/g, '+').replace(/\*/g, '%2A').replace(/\//g, '%2F').replace(/@/g, '%40');
}