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) {
		home_over = newImage("images/home-over.gif");
		home_sel = newImage("images/home-sel.gif");
		home_overmoviesel = newImage("images/home-overmoviesel.gif");
		movie_over = newImage("images/movie-over.gif");
		movie_sel = newImage("images/movie-sel.gif");
		movie_overhomesel = newImage("images/movie-overhomesel.gif");
		trailer_over = newImage("images/trailer-over.gif");
		trailer_sel = newImage("images/trailer-sel.gif");
		trailer_overhomesel = newImage("images/trailer-overhomesel.gif");
		characters_over = newImage("images/characters-over.gif");
		characters_sel = newImage("images/characters-sel.gif");
		characters_overhomesel = newImage("images/characters-overhomesel.gif");
		zomball_over = newImage("images/zomball-over.gif");
		zomball_sel = newImage("images/zomball-sel.gif");
		zomball_overhomesel = newImage("images/zomball-overhomesel.gif");
		blog_over = newImage("images/blog-over.gif");
		blog_sel = newImage("images/blog-sel.gif");
		blog_overhomesel = newImage("images/blog-overhomesel.gif");
		shop_over = newImage("images/shop-over.gif");
		shop_down = newImage("images/shop-down.gif");
		preloadFlag = true;
	}
}