function masqueDiv(divContenu, divBouton) {
	var strContenu = document.getElementById(divContenu);
	var strBouton =  document.getElementById(divBouton);

	if (strContenu.className == "on") {
		strContenu.className = "off";
		strBouton.className = "off";
	} else {
		strContenu.className = "on"
		strBouton.className = "on";
	}
}