function montre(id) {
var d = document.getElementById(id);
	for (var i = 1; i<=10; i++) {
		if (document.getElementById('smenu'+i)) {document.getElementById('smenu'+i).style.display='none';}
	}
if (d) {d.style.display='block';}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		topnav_who = newImage('images/topnav_who-over.gif');
		topnav_what = newImage('images/topnav_what-over.gif');
		topnav_how = newImage('images/topnav_how-over.gif');
		topnav_cont = newImage('images/topnav_cont-over.gif');
		topnav_arcv = newImage('images/topnav_arcv-over.gif');
		preloadFlag = true;
	}
}