function buttonHighlight(event)
{
  var elt = Event.element(event).id;

  $(elt).setStyle({
    background: "url('css/img/remove-photos-on.gif') no-repeat"
  });
}

function buttonDownlight(event)
{
  var elt = Event.element(event).id;

  $(elt).setStyle({
    background: "url('css/img/remove-photos-off.gif') no-repeat"
  });
}


Event.observe('remove-button', 'mouseover', buttonHighlight);
Event.observe('remove-button', 'mouseout', buttonDownlight);