function activerMenus() {
	document.getElementById('menu_portfolio').onclick = function() { menuClic(document.getElementById('portfolio_details')) };
	document.getElementById('menu_shows').onclick = function() { menuClic(document.getElementById('shows_details')) };
	document.getElementById('menu_shop').onclick = function() { menuClic(document.getElementById('shop_details')) };
}

function menuClic(details) {
	if(details.style.visibility == "visible") {
		details.style.height = "0";
		details.style.visibility = "hidden";
		details.style.position = "absolute";
	} else {
		details.style.height = "auto";
		details.style.visibility = "visible";
		details.style.position = "relative";
	}
	
	var dim = document.getElementById("menu").clientHeight;
	document.getElementById("body").style.height = dim+"px";
	document.getElementById("contenu").style.height = (dim-20)+"px";
}