/**
* Writes a media_manager button.
*
* @param string $directory The subdirectory to upload the media to.
* @param string $alt An override for the alt text.
*
* @return void
*
* @since 1.5
*/
public static function media_manager($directory = '', $alt = 'JTOOLBAR_UPLOAD')
{
$bar = Toolbar::getInstance('toolbar');
// Add an upload button.
$bar->appendButton('Popup', 'upload', $alt, 'index.php?option=com_media&tmpl=component&task=popupUpload&folder=' . $directory, 800, 520);
}