format file size function

	function formatFileSize($col,$size,$row)
	{
		$sizes = array('B', 'kB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB');
		$retstring = '%01.2f %s';
		$lastsizestring = end($sizes);
		foreach ($sizes as $sizestring)
		{
				if ($size < 1024) { break; }
				if ($sizestring != $lastsizestring) { $size /= 1024; }
		}
		if ($sizestring == $sizes[0]) { $retstring = '%01d %s'; }
		return sprintf($retstring, $size, $sizestring);
	}