// JavaScript Document

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

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(arguments);
}

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

var selected = '';
var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		var nav_01_over = newImage("/images/nav_01-over.gif");
		var nav_01_sel = newImage("/images/nav_01-sel.gif");
		var nav_02_over = newImage("/images/nav_02-over.gif");
		var nav_02_sel = newImage("/images/nav_02-sel.gif");
		var nav_03_over = newImage("/images/nav_03-over.gif");
		var nav_03_sel = newImage("/images/nav_03-sel.gif");
		var nav_04_over = newImage("/images/nav_04-over.gif");
		var nav_04_sel = newImage("/images/nav_04-sel.gif");
		var nav_05_over = newImage("/images/nav_05-over.gif");
		var nav_05_sel = newImage("/images/nav_05-sel.gif");
		preloadFlag = true;
	}
}

preloadImages();