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) {
		nav_01 = newImage("nav/01-a.gif");
		nav_02 = newImage("nav/02-a.gif");
		nav_03 = newImage("nav/03-a.gif");
		nav_04 = newImage("nav/04-a.gif");
		nav_05 = newImage("nav/05-a.gif");
		nav_06 = newImage("nav/06-a.gif");
		nav_07 = newImage("nav/07-a.gif");
		nav_08 = newImage("nav/07-a.gif");
		nav_impressum = newImage("nav/impressum-a.gif");
		preloadFlag = true;
	}
}

function winCallback() {
	win=window.open("http://www.buero-d.de/kunden/ammann/callback.php","CallBack","toolbar=no,scrollbars=no,location=no,status=no,menubar=no,height=392,width=300");
	win.focus();
}