var overmenu = false;
var timerid = 0;
var currentmenu = null;
function menuover(menu) {
	if(currentmenu == null) currentmenu = menu;
	if(menu != currentmenu) hidemenu();
	document.getElementById(menu).style.display = 'block';
	overmenu = true;
	currentmenu = menu;
}

function submenuover() {
	overmenu = true;
}

function menuout() {
	clearTimeout(timerid);
	timerid = setTimeout('hidemenu()',1000);
	overmenu = false;
}

function hidemenu() {
	if(overmenu == false) {
		document.getElementById(currentmenu).style.display = 'none';
	}
}