function openclose(menu)
{
	var elt = document.getElementById(menu);
	if(elt.className.indexOf("open") > -1)
	{
		closemenu(menu);
	}
	else
	{
		closemenus();
		openmenu(menu);
	}
}

function closemenus()
{
	closemenu("menu_association");
	closemenu("menu_activites");
	closemenu("menu_partenaires");
	closemenu("menu_membres");
	closemenu("menu_administration");
}

function closemenu(menu)
{
	var elt = document.getElementById(menu);
	if(elt && elt.className)
		elt.className=elt.className.replace(new RegExp(" open\\b"), "");
}

function openmenu(menu)
{
	var elt = document.getElementById(menu);
	elt.className+=" open";
}