window.onload = function(){
  var imgActivityTrack = document.createElement('IMG');
  imgActivityTrack.id = "innerWidgetActivityTrack";
  imgActivityTrack.src = "";
  imgActivityTrack.style.display = "none";
  document.body.appendChild(imgActivityTrack);
}

function t(paramURL) {
  var randomNumber=Math.floor(Math.random()*10000000000001);
  document.getElementById("innerWidgetActivityTrack").src = paramURL+randomNumber;
}