function bildaustausch(bild,quelle,ebene) {
	if (document.layers) {
		if(ebene=="") {
			document.images[bild].src=quelle;
		} else {
			document.layers[ebene].document.images[bild].src=quelle;
		}
	}
	// else if(document.all) { document.all[bild].src=quelle;}
	else if(document.getElementById) {
		document.getElementById(bild).src=quelle;
	}
}
function details(pfad, b, h) 
{
	
	if (b == null) { var b = 750; }
	if (h == null) { var h = window.screen.availHeight-100;	}
	var offset = 25;
	
	var links = (window.screen.availWidth-b)/2;
	var oben = ((window.screen.availHeight-h)/2)-offset;
	newwin = window.open(pfad,'lade','toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=1,resizable=0,copyhistory=no,width='+b+',height='+h+',top='+oben+',left='+links); 
	setTimeout('newwin.focus();',200); 
}