function toutFermer() {
	var avant = document.getElementById("avant_concert");
	var etiquette = document.getElementById("etiquette_concert");
	
	avant.className = "hidden";
	etiquette.className = "hidden";
}

function ouvrir (unpiv, unlien) {
	var lepiv = document.getElementById(unpiv);
	if (unlien.className=="plus") {
		unlien.className = "moins";
		lepiv.className = "block";
	} else if (unlien.className=="moins") {
		unlien.className = "plus";
		lepiv.className = "hidden";
	}
}

function toutFermerConcerts () {
	document.getElementById("grandsconcerts").className = "hidden";
	document.getElementById("grandsconcerts_f").className = "hidden";
	document.getElementById("famille").className = "hidden";
	document.getElementById("hommagebach").className = "hidden";
	document.getElementById("desjardins").className = "hidden";
	document.getElementById("electrisant").className = "hidden";
	document.getElementById("matins").className = "hidden";
	document.getElementById("monde").className = "hidden";
	document.getElementById("spacer").className = "hidden";
}

function ouvrirConcert (unpiv, unlien) {
	toutFermerConcerts ();
	var lepiv = document.getElementById(unpiv);
	for (var i=0; i<unlien.parentNode.parentNode.childNodes.length; i++) {
		if (unlien.parentNode.parentNode.childNodes[i].nodeName) {
			unlien.parentNode.parentNode.childNodes[i].className = "bulletrouge";
		}
	}
	
	if (lepiv.className=="hidden") {
		lepiv.className = "block";
		unlien.parentNode.className = "nobullet";
	} else if (lepiv.className=="block") {
		lepiv.className = "hidden";
	}
}