var timer_id;
function scroll_iframe(frm,inc,dir)
{
  if (timer_id) clearTimeout(timer_id);
  if (window.frames[frm])
  {
    if (dir == "v") window.frames[frm].scrollBy(0, inc);
    else window.frames[frm].scrollBy(inc, 0);
    timer_id = setTimeout("scroll_iframe('" + frm + "'," + inc + ",'" + dir + "')", 20);
  }
}

function stopScroll()
{ 
	if (timer_id) clearTimeout(timer_id);
}