function popup(URL) {
		var win1 = window.open (URL,'win1','toolbar=0,location=0,directories=0,status=0,statusbar=0,menubar=0,scrollbars=0,resizable=0,copyhistory=0,width=540,height=540');
		win1.document.close();
		var winl = (screen.width - 540) / 2;
		var wint = (screen.height - 540) / 2;
		win1.moveTo(winl,wint);  
		}

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

function changeImagesArray(array) {
	if (preloadFlag == true) {
		var d = document; var img;
		for (var i=0; i<array.length; i+=2) {
			img = null; var n = array[i];
			if (d.images) {img = d.images[n];}
			if (!img && d.getElementById) {img = d.getElementById(n);}
			if (img) {img.src = array[i+1];}
		}
	}
}

function changeImages() {
	changeImagesArray(changeImages.arguments);
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		pre__1_Ausstellung_on = newImage('images/1-Ausstellung_on.gif');
		pre__2_Rahmenprogramm_on = newImage('images/2-Rahmenprogramm_on.gif');
		pre__3_Fuehrungen_Workshops_on = newImage('images/3-Fuehrungen-Workshops_on.gif');
		pre__4_Touristische_Angebote_on = newImage('images/4-Touristische-Angebote_on.gif');
		pre__5_Presseinformation_on = newImage('images/5-Presseinformation_on.gif');
		pre__6_Information_Kontakt_on = newImage('images/6-Information-Kontakt_on.gif');
		pre__7_Bildergalerie_on = newImage('images/7-Bildergalerie_on.gif');
		preloadFlag = true;
	}
}