function FotoWindow(bildurl,b,h) {
	var eigenschaft,sbreite,shoehe,fenster,b,h;
	
	// stellt die Bildschirmabmessungen fest
	// find window size
	var ns6 = (!document.all && document.getElementById);
	var ie4 = (document.all);
	var ns4 = (document.layers);
	
	if(ns6||ns4) {
	sbreite = innerWidth;
	shoehe = innerHeight;
	}
	else if(ie4) {
	sbreite = document.body.clientWidth;
	shoehe = document.body.clientHeight;
	}
	
	x = (sbreite-b)/2;
	y = (shoehe-h)/2;
	
	eigenschaften="left="+x+",top="+y+",screenX="+x+",screenY="+y+",width="+b+",height="+h+",menubar=no,toolbar=no";
	
	fenster=window.open("","",eigenschaften);
	fenster.focus();
	fenster.document.open();
	with (fenster) {
	  document.write('<html><head>');
	  document.write("<script type='text/javascript' language='JavaScript'>");
	  // bei click  schliessen , on click close
	  document.write("function click() { window.close(); } ");
	  document.write("document.onmousedown=click ");
	  document.write("</script>");
	  document.write('<title>klick zum schließen</title></head>');
	  // bei Focusverlust schliessen, close if window looses focus
	  document.write('<body onblur="window.close()" ');
	  document.write('marginwidth="0" marginheight="0" leftmargin="0" topmargin="0">');
	  document.write('<center>');
	  document.write('<img src="'+ bildurl +'" border="0" width="'+ b +'" height="'+ h +'">');
	  document.write('<center>');
	  document.write('</body></html>');
	  fenster.document.close();
	}
}

