sfHover = function() {
	var sfEls = document.getElementById("nav").getElementsByTagName("LI");
	for (var i=0; i<sfEls.length; i++) {
		sfEls[i].onmouseover=function() {
			this.className+=" sfhover";
		}
		sfEls[i].onmouseout=function() {
			this.className=this.className.replace(new RegExp(" sfhover\\b"), "");
		}
	}
}
if (window.attachEvent) window.attachEvent("onload", sfHover);


function close_menu () {
	$('smenu_qui_sommes_nous').hide();
	$('smenu_infrastructure').hide();
	$('smenu_projet').hide();
	$('smenu_chiffre_cle').hide();
	$('smenu_demarche_environnementale').hide();
	$('smenu_espace_com').hide();
	$('smenu_question_reponse').hide();
	$('smenu_gestion_dechet').hide();
	$('smenu_reduits').hide();
	$('smenu_trie').hide();
	$('smenu_coin_enfants').hide();
	$('smenu_marchepublic').hide();
}

function open_menu(id) {
	new Effect.Appear(id, {to : 1});
}

function open_overlay() {
	$('overlay').show();
}

function close_overlay() {
	$('overlay').hide();
}