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 changeImages() {
	if (document.images && (preloadFlag == true)) {
		var img;
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			img = null;
			if (document.layers) {
				img = findElement(changeImages.arguments[i],0);
			}
			else {
				img = document.images[changeImages.arguments[i]];
			}
			if (img) {
				img.src = changeImages.arguments[i+1];
			}
		}
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		headerbar_03_over = newImage("images/headerbar_03-over.gif");
		headerbar_05_over = newImage("images/headerbar_05-over.gif");
		headerbar_08_over = newImage("images/headerbar_08-over.gif");
		headerbar_11_over = newImage("images/headerbar_11-over.gif");
		headerbar_17_over = newImage("images/headerbar_17-over.gif");
		products_14_over = newImage("images/products_14-over.gif");
		products_17_over = newImage("images/products_17-over.gif");
		products_34_over = newImage("images/products_34-over.gif");
		products_37_over = newImage("images/products_37-over.gif");
		vessels_18_over = newImage("images/vessels_18-over.gif");
		vessels_20_over = newImage("images/vessels_20-over.gif");
		vessels_40_over = newImage("images/vessels_40-over.gif");
		vessels_42_over = newImage("images/vessels_42-over.gif");
		vessels_62_over = newImage("images/vessels_62-over.gif");
		vessels_64_over = newImage("images/vessels_64-over.gif");
		vessels_78_over = newImage("images/vessels_78-over.gif");
		contact_button_12_over = newImage("img/contact_button_12-over.gif");
		preloadFlag = true;
	}
}