function toggle() {
	$('spazio').toggleClass('spazio');
}
	function resize() {
		var height = $('spazio').getStyle('height').toInt();
		if (height > 150) {
			$('spazio').effects({duration: 1500, transition: Fx.Transitions.quadOut}).start({'height':[150]});
		} else {
			$('spazio').effects({duration: 1500, transition: Fx.Transitions.quadOut}).start({'height':[348]});
		}
	}
	function rettOn() {
		$('resize').effects({duration: 0}).start({'opacity': 0.7});
	}
	function rettOff() {
		$('resize').effects({duration: 0}).start({'opacity': 0});
	}