function actionMenu(f1,f2)
{
		document.getElementById(f1).style.visibility='hidden';
		document.getElementById(f2).style.visibility='visible';
}

function menuVisible(degrade)
{
	document.getElementById(degrade).style.visibility='visible';
}

function menuMasque(degrade)
{
	document.getElementById(degrade).style.visibility='hidden';
}