window.addEvent('domready', function(){

	$$('.dropDown').addEvents({
		'mouseenter': function(){
			// Always sets the duration of the tween to 1000 ms and a bouncing transition
			// And then tweens the height of the element
			this.set('tween', {
				duration: 700
			}).tween('height', '300px');
		},
		'mouseleave': function(){
			// Resets the tween and changes the element back to its original size
			this.set('tween', {}).tween('height', '20px');
		}
	});
	
});