var Timer;

function ScrollLeft()
{
  document.getElementById('scroller').scrollLeft -= 144;
}
function ScrollRight()
{
  document.getElementById('scroller').scrollLeft += 144;;
}


function clearUp() {
  clearInterval(Timer);
  document.getElementById("scrollButtonUp").style.backgroundImage = "url(images/scroll_up.gif)";
}

function clearDown() {
  clearInterval(Timer);
  document.getElementById("scrollButtonDown").style.backgroundImage = "url(images/scroll_down.gif)";
}