var thumb_div = oFind ('d_thumb');
var thumb_img = oFind ('i_thumb');
var skip_hiding = false;

function start_dragging (photo_file_name)
{
  if (photo_file_name == '')
    return;

  skip_hiding = true;

  thumb_img.src = photo_file_name;
  oShow(thumb_div);
  thumb_img.style.filter = 'alpha(opacity=90)';
}

function stop_dragging ()
{
  skip_hiding = false;
  setTimeout('_stop_dragging()', 50);
}

function _stop_dragging ()
{
  if (skip_hiding)
    return;

  oHide(thumb_div);
}

function position_thumb ()
{
  shiftTo (thumb_div, mX + 20, mY - 60);
}