function popup(songNumber, type)
{
  if (!window.focus)return true;

  if (type=='a')   // audio
    window.open('http://musicministry.starcatcher.ca/hymns/songview.php?id='+songNumber+'&type=audio', 
      'audio'+songNumber, 'width=400,height=130,scrollbars=no');
  else
    window.open('http://musicministry.starcatcher.ca/hymns/songview.php?id='+songNumber, 
      'sheet'+songNumber, 'width=700,scrollbars=yes');

  return false;
}