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// Script by Thomas Stich
// http://www.stichpunkt.de/beitrag/popup.html
// (modifiziert fuer Zentrierung)

var fenster = null;

function fensterzu() {
if (fenster && !fenster.closed) fenster.close();
}

function neufenster(obj,w,h) {
var url = (obj.getAttribute) ? obj.getAttribute('href') : obj.href;
if (!url) return true;

var ns6 = (!document.all && document.getElementById);
var ie4 = (document.all);
var ns4 = (document.layers);

if(ns6||ns4) {
swidth = innerWidth;
sheight = innerHeight;
}
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swidth = document.body.clientWidth;
sheight = document.body.clientHeight;
}

x = (swidth-540)/2;
y = (sheight-580-100)/2;

w = (w) ? w += 20 : 540;
h = (h) ? h += 25 : 580;

var eigenschaften = 'left='+x+',top='+y+',screenX='+x+',screenY='+y+',width='+w+',height='+h+',resizable';
fensterzu();
fenster = window.open(url,'',eigenschaften);
return (fenster) ? false : true;
}
window.onunload = fensterzu;
window.onfocus = fensterzu;
//-->