Element.implement({
	flash: function(to,from,reps,prop,dur) {
		
		//defaults
		if(!reps) { reps = 1; }
		if(!prop) { prop = 'background-color'; }
		if(!dur) { dur = 250; }
		
		//create effect
		var effect = new Fx.Tween(this, {
				duration: dur,
				link: 'chain'
			})
		
		//do it!
		for(x = 1; x <= reps; x++)
		{
			effect.start(prop,from,to).start(prop,to,from);
		}
	}
});