addImgTrackerCounter = 0;

function addImgTracker(destinationElement,imgSrc) 
{
  addImgTrackerCounter++;
  var newElem = document.getElementById(destinationElement);
  var newImg = document.createElement('img');
  newImg.setAttribute('src',imgSrc+'&counter='+addImgTrackerCounter);
  newImg.setAttribute('id','popupImgTracker');   
  newElem.appendChild(newImg);
  //removeElement(destinationElement, 'popupImgTracker')
  return true;
}

function removeElement(parentElement, toRemoveElement) {
  var d = document.getElementById(parentElement);
  var olddiv = document.getElementById(toRemoveElement);
  d.removeChild(olddiv);
}