function preloadimages() {
	if (document.images) {
		img1 = new Image();
		img1.src = "nav/kpmg_on.gif";
		img2 = new Image();
		img2.src = "nav/notre-culture-rh_on.gif";
		img3 = new Image();
		img3.src = "nav/nos_metiers_on.gif";
		img4 = new Image();
		img4.src = "nav/nous_rencontrer_on.gif";
		img5 = new Image();
		img5.src = "nav/nous_rejoindre_on.gif";
	}
}

var navactive = null;

function closenavactive() {
	if (navactive) {
		document.getElementById("bt_"+navactive).src = "nav/"+navactive+".gif";
		if (document.getElementById("subnav_"+navactive)) document.getElementById("subnav_"+navactive).style.display = "none";
	}
}

function nav(a) {
	closenavactive();
	navactive = a;
	document.getElementById("bt_"+a).src = "nav/"+a+"_on.gif";
	if (document.getElementById("subnav_"+a)) document.getElementById("subnav_"+a).style.display = "block";
}