var attribWithoutAll="location=no,menubar=no,toolbar=no,status=no";
attribWithoutAll+=",resizable=no,scrollbars=yes,width=900,height=700";

var subwindow=0;

function ClosePopUp()
{
  if (!subwindow)          /* wenn noch nicht geoeffnet */
    return;                /* nix zu tun, Abbruch */
  if (subwindow.closed)    /* wenn schon zugemacht */
    return;                /* nix zu tun, Abbruch */
  subwindow.close();       /* mach zu */
}

function PopUpWithoutAll(url)
{
  var padding;
    (navigator.appName == "Microsoft Internet Explorer") ? (padding = 10) : (padding = 0); 

  var screenw = screen.availWidth;
  var screenh = screen.availHeight;
  var winw = (1000 + 15 + padding);
  var winh = (700 + 15 + padding);
  var posx = (screenw / 2) - (winw / 2);
  var posy = (screenh / 2) - (winh / 2); 
  ClosePopUp()             /* erstmal bisher geoeffnetes Popup zumachen */
  subwindow=window.open(url,"popup",attribWithoutAll);
    /* test.html unter dem Fensternamen "popup" aufmachen und Fensterobjekt merken */
  subwindow.moveTo(posx,posy); /* Fenster nach links oben schieben */
//  subwindow.focus();
}