var mobile_video_rules = {
	'.video': function(event){
		if (navigator.userAgent.match(/iPhone/i) || (navigator.userAgent.match(/iPod/i))) {
			var html = '<p><a href="http://itunes.apple.com/nl/app/rotje/id347590113?mt=8"><img src="images/appstore.gif" alt="download in de appstore" /></a></p>';
			this.update(html);
		}
	}
}
Event.addBehavior(mobile_video_rules);