userAgent = window.navigator.userAgent;
browserVers = parseInt(userAgent.charAt(userAgent.indexOf("/")+1),10);
function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function findElement(n,ly) {
	if (browserVers < 4)		return document[n];
	var curDoc = ly ? ly.document : document;
	var elem = curDoc[n];
	if (!elem) {
		for (var i=0;i<curDoc.layers.length;i++) {
			elem = findElement(n,curDoc.layers[i]);
			if (elem) return elem;
		}
	}
	return elem;
}

function changeImagesArray(array) {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<array.length; i+=2) {
			img = null;
			if (document.layers) {
				img = findElement(array[i],0);
			}
			else {
				img = document.images[array[i]];
			}
			if (img) {
				img.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) {
		about = newImage("images/about.jpg");
		about_down = newImage("images/about-down.jpg");
		about_over = newImage("images/about-over.jpg");
		about_sel = newImage("images/about-sel.jpg");
		deu = newImage("images/deu.jpg");
		deu_down = newImage("images/deu-down.jpg");
		deu_over = newImage("images/deu-over.jpg");
		deu_sel = newImage("images/deu-sel.jpg");
		eng = newImage("images/eng.jpg");
		eng_down = newImage("images/eng-down.jpg");
		eng_over = newImage("images/eng-over.jpg");
		eng_sel = newImage("images/eng-sel.jpg");
		hun = newImage("images/hun.jpg");
		hun_down = newImage("images/hun-down.jpg");
		hun_over = newImage("images/hun-over.jpg");
		hun_sel = newImage("images/hun-sel.jpg");
		main_page01_02 = newImage("images/main_page01_02.jpg");
		main_page01_04 = newImage("images/main_page01_04.jpg");
		main_page01_06 = newImage("images/main_page01_06.jpg");
		main_page01_08 = newImage("images/main_page01_08.jpg");
		main_page01_10 = newImage("images/main_page01_10.jpg");
		main_page01_12 = newImage("images/main_page01_12.jpg");
		main_page01_13 = newImage("images/main_page01_13.jpg");
		main_page01_13a = newImage("images/main_page01_13a.jpg");
		main_page01_15 = newImage("images/main_page01_15.jpg");
		mainhdr01 = newImage("images/mainhdr01.jpg");
		mainhdr02 = newImage("images/mainhdr02.jpg");
		ukr = newImage("images/ukr.jpg");
		ukr_down = newImage("images/ukr-down.jpg");
		ukr_over = newImage("images/ukr-over.jpg");
		ukr_sel = newImage("images/ukr-sel.jpg");
		preloadFlag = true;
	}
}