if(wxtools){
  wxtools.ABtesting = {};
  wxtools.ABtesting.playerId = 1612722369;
  wxtools.ABtesting.on = false;

  wxtools.ABtesting.switchUser=function(playerId){
    var derTestName = "test001";
    var derPct = 50;
    var retValue = {};
    var pinned=getUserPreferences('4');
    if(pinned.match(derTestName) && playerId==wxtools.newsChannelID){
      //select the right videoplayer
        var testGroup=pinned.substr((pinned.length-1),1);
        switch(testGroup){
	  case 'A':
            retValue.adServerURL = encodeURI("http://ad.doubleclick.net/pfadx/twc.i/news.b");
	    retValue.playerId=wxtools.ABtesting.playerId;
            return retValue;
	    break;
	  case 'B':
            retValue.adServerURL = wxtools.adServerURL;
            retValue.playerId = playerId;
	    return retValue;
        }
    }else if(playerId==wxtools.newsChannelID){
      var curDate=new Date();
      var secs=curDate.getSeconds();
      var pct = parseInt(secs*100/60);
      if(pct<=derPct){
        setUserPreferences('4',derTestName+"A");
        retValue.adServerURL = encodeURI("http://ad.doubleclick.net/pfadx/twc.i/news.b");
        retValue.playerId = wxtools.ABtesting.playerId;
        return retValue;
      }else{
        setUserPreferences('4',derTestName+"B");
        retValue.adServerURL = wxtools.adServerURL;
        retValue.playerId = playerId;
        return retValue;
      }
    }else{
      retValue.adServerURL = wxtools.adServerURL;
      retValue.playerId = playerId;
      return retValue;
    }
  }
}