function thtrackerCallback(ajax){
  var xml = ajax.responseXML;
}

function clickTrackerCallback(ajax){
  var xml = ajax.responseXML;
}

function thtracker(pid,oid){
  var ajax = new thajax();
  //ajax.onError = function (){alert(this.error);}
  ajax.request("?command=rfpClickTracker&pid="+pid+"&oid="+oid, thtrackerCallback);
}

function clickTracker(command,typeid,id,typeid2,id2){
  var ajax = new thajax();
  var extra = "";
  if(id2){
    extra = "&"+typeid2+"="+id2;
  }
  ajax.request("?command="+command+"&"+typeid+"="+id+extra, clickTrackerCallback);
}