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) {
		steine_over = newImage("images/steine-over.gif");
		Berckwerke_over = newImage("images/Berckwerke-over.gif");
		Kontakt_over = newImage("images/Kontakt-over.gif");
		Impressum_over = newImage("images/Impressum-over.gif");
		preloadFlag = true;
	}
}


function winOpen(fileN)
{
	theOpeners = window.open('','Berckwerk','scrollbars=yes,menubar=no,location=no,toolbar=no,status=no,resizable=no,width=600,height=350');
	theOpeners.location.href = fileN;
}