function popup(ort,x,y) {
  win = window.open(ort, 'Fenster','toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=yes,copyhistory=no,width='+x+',height='+y);
  win.focus();
}

function popupNoScroll(ort,x,y) {
  win = window.open(ort, 'Fenster','toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=no,copyhistory=no,width='+x+',height='+y);
  win.focus();
}

function winopen(url, w, h) {
if (typeof w=="undefined"){w=640;}
if (typeof h=="undefined"){h=480;}
 if(navigator.userAgent.indexOf("Mac") != -1) {
  newwindow = window.open(url,'viewer_win','directories=0,location=1,menubar=1,scrollbars=1,status=0,toolbar=1,resizable=1,width='+w+',height='+h+',screenx=0,screeny=0');
  if(navigator.appName == "Netscape" && parseInt(navigator.appVersion.substring(0,1)) >= 3) {newwindow.focus()}
 }
 else {
  newurl = url;
  newwindow = window.open(newurl,'viewer_win','directories=0,location=1,menubar=1,scrollbars=1,status=0,toolbar=1,resizable=1,width='+w+',height='+h+',screenx=0,screeny=0');
  newwindow.focus();
 }
}