function setzeCookie(name, wert) {
  var arg_wert = setzeCookie.arguments;
  var arg_laenge = setzeCookie.arguments.length;
  var expires = (arg_laenge > 2) ? arg_wert[2] : null;
  var path = (arg_laenge > 3) ? arg_wert[3] : null;
  var domain = (arg_laenge > 4) ? arg_wert[4] : null;
  var secure = (arg_laenge > 5) ? arg_wert[5] : false;
  document.cookie = name + "=" + escape(wert) +
    ((expires == null) ? "" : ("; expires=" +
      expires.toGMTString())) +
    ((path == null) ? "" : ("; path=" + path)) +
    ((domain == null) ? "" : ("; domain=" + domain)) +
    ((secure == true) ? "; secure" : "");
}

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.indesOf(" ", i) + 1;
    if (i == 0)
      break;
  }
  return null;
}

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

function loescheCookie(name) {
  var exp = new Date();
  exp.setTime(exp.getTime() - 1);
  var cookie_wert = holeCookie(name);
  if (cookie_wert != null)
    document.cookie = name + "=" + cookie_wert + "; expires=" + exp.toGMTString();
}