function overMenu(aEvent) {
	vlElement = (window.event)?window.event.srcElement.id:aEvent.target.id;
	var img = document.getElementById(vlElement);
	img.src = "img/menu_"+vlElement+"_over.png";
}

function outMenu(aEvent) {
	vlElement = (window.event)?window.event.srcElement.id:aEvent.target.id;
	var img = document.getElementById(vlElement);
	img.src = "img/menu_"+vlElement+"_out.png";
}