Event that changes the current element's style

Hi,

I using CKEDITOR.config.contentsLangDirection = 'ltr' in my config file.

I'm trying to add an event to the editor that checks if the length of the data is 1 and if so, change contentsLangDirection to 'rtl'.

So I have this:

CKEDITOR.instances['post-text'].on('change', function(event) {
    if ($(this.getData()).text().trim().length === 1) {
        // change contentsLangDirection to rtl - how?
    }
}

But I can't figure out how to actually change the direction. Any ideas?

Thanks a lot.