function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImagesArray(array) {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<array.length; i+=2) {
			document[array[i]].src = array[i+1];
		}
	}
}

function changeImages() {
	changeImagesArray(changeImages.arguments);
}

function toggleImages() {
	for (var i=0; i<toggleImages.arguments.length; i+=2) {
		if (selected == toggleImages.arguments[i])      changeImagesArray(toggleImages.arguments[i+1]);
	}
}

var selected = '';
var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		Nav_About_sel = newImage("/images/base/Nav-About-sel.gif");
		Nav_About_over = newImage("/images/base/Nav-About-over.gif");
		Nav_Committees_over = newImage("/images/base/Nav-Committees-over.gif");
		Nav_Committees_sel = newImage("/images/base/Nav-Committees-sel.gif");
		Nav_Meetings_over = newImage("/images/base/Nav-Meetings-over.gif");
		Nav_Meetings_overNav_Committeessel = newImage("/images/base/Nav-Meetings-overNav-Committeessel.gif");
		Nav_Meetings_Nav_Committees_sel = newImage("/images/base/Nav-Meetings-Nav-Committees_sel.gif");
		Nav_Meetings_sel = newImage("/images/base/Nav-Meetings-sel.gif");
		Nav_Membership_over = newImage("/images/base/Nav-Membership-over.gif");
		Nav_Membership_sel = newImage("/images/base/Nav-Membership-sel.gif");
		Nav_Networking_over = newImage("/images/base/Nav-Networking-over.gif");
		Nav_Networking_overNav_Membershipsel = newImage("/images/base/Nav-Networking-overNav-Membershipsel.gif");
		Nav_Networking_Nav_Membership_sel = newImage("/images/base/Nav-Networking-Nav-Membership_sel.gif");
		Nav_Networking_sel = newImage("/images/base/Nav-Networking-sel.gif");
		Nav_Sponsorship_over = newImage("/images/base/Nav-Sponsorship-over.gif");
		Nav_Sponsorship_sel = newImage("/images/base/Nav-Sponsorship-sel.gif");
		Nav_Home_over = newImage("/images/base/Nav-Home-over.gif");
		preloadFlag = true;
	}
}