/* Image Next Function */

function image_next(mls) {
  spot = "img" + mls;
  list = "lst" + mls;
  number = document.getElementById(list).selectedIndex;
  if (document.getElementById(list).options[number+1]) {
    document.getElementById(spot).setAttribute('src', document.getElementById(list).options[number+1].value);
    document.getElementById(list)[number+1].selected='true';
  } else {
    document.getElementById(spot).setAttribute('src', document.getElementById(list).options[0].value);
    document.getElementById(list)[0].selected='true';
  }
}

/* Image Previous Function */

function image_prev(mls) {
  spot = "img" + mls;
  list = "lst" + mls;
  number = document.getElementById(list).selectedIndex;
  if (number > 0) {
    document.getElementById(spot).setAttribute('src', document.getElementById(list).options[number-1].value);
    document.getElementById(list)[number-1].selected='true';
  } else {
    last = document.getElementById(list).length-1;
    document.getElementById(spot).setAttribute('src', document.getElementById(list).options[last].value);
    document.getElementById(list)[last].selected='true';
  }
}