browser_name = navigator.appName;
browser_version = parseFloat(navigator.appVersion);

if (browser_name == "Netscape" && browser_version >= 3.0) { browser_ok = 'true'; }
else if (browser_name == "Microsoft Internet Explorer" && browser_version >= 3.0) { browser_ok = 'true'; }
else { browser_ok = 'false'; }

function change(img, ref) {
   if (browser_ok == 'true') {
       document.images[img].src = ref;
   }
}

if (browser_ok == 'true')
{
	a1=new Image; a1.src="images/menu/director_a.gif";
	a2=new Image; a2.src="images/menu/owner_a.gif";
	a3=new Image; a3.src="images/menu/financier_a.gif";
	a4=new Image; a4.src="images/menu/trader_a.gif";
	a5=new Image; a5.src="images/menu/keeper_a.gif";
	a6=new Image; a6.src="images/menu/manager_a.gif";

}

function mf_click(mf) {
  if (!event.shiftKey) self.location.assign(mf)
}