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

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

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		nav02over = newImage("Bilder/nav02over.gif");
		nav03over = newImage("Bilder/nav03over.gif");
		nav04over = newImage("Bilder/nav04over.gif");
		nav05over = newImage("Bilder/nav05over.gif");
		nav07over = newImage("Bilder/nav07over.gif");
		nav08over = newImage("Bilder/nav08over.gif");
		nav09over = newImage("Bilder/nav09over.gif");
    nav10over = newImage("Bilder/nav10over.gif");
    nav11over = newImage("Bilder/nav11over.gif");   
		preloadFlag = true;
	}
}