function showoverlib(dirname,filename,orientation) {
  var image_desc = document.getElementById('image_desc|' + filename).value;
  var image_desc_html = '';
  
  if (image_desc != '') {
    image_desc_html = '<div style="padding-top: 2px; color: #fff; font-family: Arial, Helvetica, Sans-Serif; font-size: 11px;">' + image_desc + '</div>';
  }
  
  return overlib('<img src="media/image/'+dirname+'/'+filename+'" '+orientation+' style="min-height:150px;" class="loadingcircle">' + image_desc_html,WIDTH,10,HAUTO,VAUTO,BGCOLOR,'#888888',FGCOLOR,'#888888');
}