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

	var list = $$('#fond_menu div.menu_d');
		
	list.each(function(element,i) {

	  // The same as before: adding events
	 element.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: 1000,
				transition: Fx.Transitions.Bounce.easeOut // This could have been also 'bounce:out'
			}).tween('height', '150px');
			
		},
		'mouseleave': function(){
			
			// Resets the tween and changes the element back to its original size
			this.set('tween', {}).tween('height', '20px');
			
		}
		
	});
   });
	
});