var xPosition = 0;
function scrollBackgroundHorizontal(elementID, imageWidth){
  //alert(xPosition);
  scrollElement = document.getElementById(elementID);
  if(xPosition >= imageWidth){
  xPosition = 0;
  }
  xPosition += 1;
  scrollElement.style.backgroundPosition = xPosition + 'px center';
  //setTimeout(scrollBackgroundHorizontal(elementID, xPosition, delay), delay);
}