var menuclass = new Class({
	initialize: function() {
		$$('.cool').each(function(el){ 
		var effect = new Fx.Tween(el, { 
			duration: 300,
			property: 'font-size',
			transition: Fx.Transitions.Expo.easeOut,
			wait: false
		});
		el.taille = el.getStyle('font-size').toInt();  
		el.addEvents({
			'mouseover': function () { 
				effect.start(22, 32); },
			'mouseout': function () {
				effect.start(32, 22); }
		});
	});
	}
});