var numMenus = 5;
var timeOn;

function showMenu(menuNumber) {
	menuOver()
	hideAllMenus();
	document.getElementById("menuLayer"+menuNumber).style.display = '';
}

function hideAllMenus(menuNumber) {
    for(counter = 1; counter <= numMenus; counter++) {
		document.getElementById("menuLayer"+counter).style.display = 'none';
	}
}

function menuOver() {
	clearTimeout(timeOn);
}

function menuOut(timeout) {
	timeOn = setTimeout("hideAllMenus()", timeout);
}