var numMenus = 5;

function showMenu(menuNum, eventObj) {
	hideAllMenus();
    var menuId = 'dropmenu' + menuNum;
	changeObjectVisibility(menuId, 'visible');
	changeObjectVisibility('rolloffLower', 'visible');
	changeObjectVisibility('rolloffUpper', 'visible');
	changeObjectVisibility('rolloffLeft', 'visible');	
	changeObjectVisibility('rolloffRight', 'visible');
	showActiveImg(menuNum);
}
function hideAllMenus() {
	hideActiveImg();
	for (counter = 1; counter <= numMenus; counter++) {
		changeObjectVisibility('dropmenu' + counter, 'hidden');
	}
	changeObjectVisibility('rolloffLower', 'hidden');
	changeObjectVisibility('rolloffUpper', 'hidden');
	changeObjectVisibility('rolloffLeft', 'hidden');	
	changeObjectVisibility('rolloffRight', 'hidden');
}
function stickyMenu() {
	hideAllMenus();
	if (showSubNav) {
		changeObjectVisibility('dropmenu' + menuPage, 'visible');
	}
}
function showActiveImg(menuNum) {
	if (menuNum == 1) {
		document['nav1'].src = 'images/nav/about-on.gif';
	} else if (menuNum == 2) {
		document['nav2'].src = 'images/nav/sanpedro-on.gif';
	} else if (menuNum == 3) {
		document['nav3'].src = 'images/nav/wilmington-on.gif';
	} else if (menuNum == 4) {
		document['nav4'].src = 'images/nav/calendar-on.gif';
	} else if (menuNum == 5) {
		document['nav5'].src = 'images/nav/newsroom-on.gif';
	}
}
function hideActiveImg() {
	if (menuPage != 1) {
		document['nav1'].src = 'images/nav/about-off.gif';
	}
	if (menuPage != 2) {
		document['nav2'].src = 'images/nav/sanpedro-off.gif';
	}
	if (menuPage != 3) {
		document['nav3'].src = 'images/nav/wilmington-off.gif';
	} 
	if (menuPage != 4) {
		document['nav4'].src = 'images/nav/calendar-off.gif';
	}
	if (menuPage != 5) {
		document['nav5'].src = 'images/nav/newsroom-off.gif';
	}
}