function setzeCookie(Bezeichner, Wert, Verfall)
  {
   var jetzt = new Date();
   var Auszeit = new Date(jetzt.getTime() + Verfall);
   if (Verfall>0)
   	document.cookie = Bezeichner+"="+Wert+"; expires="+Auszeit.toGMTString()+";";
   else
	document.cookie = Bezeichner+"="+Wert+";";
  }

function holeCookieWert(position) {
  var ende = document.cookie.indexOf (";", position);
  if (ende == -1) 
    ende = document.cookie.length;

  return unescape(document.cookie.substring(position, ende));
}

function holeCookie(name) {
  name += "=";
  var laenge = name.length;
  var cookie_laenge = document.cookie.length;
  var i = 0;
  while (i < cookie_laenge) {
    var j = i + laenge;
    if (document.cookie.substring(i, j) == name) 
      return holeCookieWert (j);
    i = document.cookie.indexOf(" ", i) + 1;
    if (i == 0)
      break;
  }
  return null;
}