//Funktion um ein neues Fenster zentriert aufzumachen

function openWindow(theURL,winName,sizex,sizey) { //v2.0
  newwin = window.open(theURL,winName,"width=" + sizex + ",height=" + sizey + ",toolbar=no,location=no,directories=no,status=0,resizable=yes,scrollbars=yes,menubar=no");
  newwin.moveTo(((screen.width/2)-(sizex/2)),((screen.height/2)-(sizey/2)));
}