var hemingway_rules = {
    '#openSlidebar': function(element) {
        element.onclick = function() {
            var targetDiv = $('slidebar');
            new Effect.BlindDown(targetDiv, { duration: 0.5 });
            new Effect.Fade(this);
            Effect.Appear('closeSlidebar', { delay: 1 });
        }
    },
    '#closeSlidebar': function(element) {
        element.onclick = function() {
            var targetDiv = $('slidebar');
            new Effect.BlindUp(targetDiv, { duration: 0.5 });
            new Effect.Fade(this);
            Effect.Appear('openSlidebar', { delay: 1 });
        }
    }
};
Behaviour.register(hemingway_rules);