function menu_deroulant1 (num, max) {
	if (num == 0) {
		for (i=1; i<=max; i++) {
			document.getElementById('sousmenu'+i).className = 'hidden';
		}
	} else {
		for (i=1; i<=max; i++) {
			if (i != num) document.getElementById('sousmenu'+i).className = 'hidden';
		}
		document.getElementById('sousmenu'+num).className = 'block';
	}
}