joomla - How to limit characters in JFactory::getEditor - Joomla

Question

$editor = & JFactory::getEditor();
$params = array('smilies'=> '0' ,'style'  => '0' ,'layer'  => '0' ,'table'  => '0' ,'clear_entities'=>'0');
$editor->display('description', $description , 550, 400, 60, 20, false, $params);

I use above code to generate a WYSIWYG editor in Joomla. Is there are way to limit character you enter in the editor?

Thanks