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';
}


var opac = new Array;
for (i=1; i<=6; i++) {
	opac[i] = 0;
}
opac[1] = 0.5;
var sens = 0;
var img = 1;
var ie;
function opacite () {
	var image = 'img'+img;
	var i;
	var y;
	for (i=1; i<=6; i++) {
		if (i == img) opac[i] = opac[i] + 0.01;
		else opac[i] = opac[i] - 0.01;
		if (opac[i] > 1) {
			img++;
			for (y=1; y<=6; y++) {
				if (y != i) opac[y] = 0;
			}
			if (img > 6) img = 1;
		}
	}
	
	
	for (i=1; i<=6; i++) {
		document.getElementById('img'+i).style.opacity = opac[i];
		ie = opac[i] * 100;
		document.getElementById('img'+i).style.filter = 'Alpha(opacity='+ie+')';
	}
}