history.inc

<?php
global $ROOT_PATH;
include_once($ROOT_PATH.'wysiwyg_plugin.inc');

class history extends wysiwyg_plugin
{

    function history()
    {
        $this->_add_button('undo','Undo','Undo','false','12');
        $this->_add_button('redo','Redo','Redo','false','13');
    }

}

?>