function popup(w, h, site) {
	//alert('test: ' + site);

   x = screen.availWidth/2-w/2; 
   y = screen.availHeight/2-h/2; 
   //popupWindow = window.open('js/pictureResized.php?path='+site,'','width='+w+',height='+h+',left='+x+',top='+y+',screenX='+x+',screenY='+y); 
   window.open('http://www.otto-wulff.de/cms/js/pictureResized.php?path='+site,'','width='+w+',height='+h+',left='+x+',top='+y+',screenX='+x+',screenY='+y);
}