function clignote_message () {
	var obj = document.getElementById(id);
	if (obj.style.visibility == 'visible') {
		obj.style.visibility = 'hidden';
	} else {
		obj.style.visibility = 'visible';
	}
}

function menu_deroulant (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';
	}
}

function volet_visible (num) {
	for (i=1; i<=6; i++) {
		if (i != num) document.getElementById('volet'+i).className = 'hidden';
	}
	document.getElementById('volet'+num).className = 'block';
}