var monitor = screen.availWidth;
 function NeuFenster(breit,hoch,url,rollen) {
 var links = monitor -breit -8;
 var para = "width="+breit+",height="+hoch+",top=0,left="+links+",screenX="+links+",screenY=0,scrollbars="+rollen;
  MeinFenster=window.open(url,"Zweitfenster",para); }
 function wertHolen() { //1.
  var wert = "";
  if(document.cookie) {
  wertstart = document.cookie.indexOf("=") + 1;
  wertende = document.cookie.indexOf(";");
  if(wertende == -1) wertende = document.cookie.length;
  wert = document.cookie.substring (wertstart,wertende);
  }
  return wert;
  }
  function wertSetzen(bezeichner, wert, verfall) { // 2.
   var jetzt =new Date();
   var auszeit = new Date(jetzt.getTime() + verfall);
   document.cookie = bezeichner+"="+wert+"; expires="+auszeit.toGMTString()+";";
  }


var win = null;                      //   Fenster zentriert
function WindowZentriert(mypage,myname,w,h,scroll){
LeftPosition = (screen.width) ? (screen.width-w)/2 : 0;
TopPosition = (screen.height) ? (screen.height-h)/2 : 0;
settings =
'height='+h+',width='+w+',top='+TopPosition+',left='+LeftPosition+',scrollbars='+scroll+',resizable'
win = window.open(mypage,myname,settings)
if(win.window.focus){win.window.focus();}
}

Fenster = null;              // Fenster schliessen
function demo()
{
Fenster = window.open("popup.php","demo","toolbar=no,menubar=no,top=0,left=0,width=300,height=300")
Fenster.focus();
}
function zu()
{
   if (Fenster != null)
     if (!Fenster.closed)
       Fenster.close();
}