function setCookie(name, wert, dauer) {
  var cook = name+"="+unescape(wert);
  if (dauer) cook += ";expires="+(dauer*1000);
/*   cook += (domain) ? "; domain="+ domain : "";
  cook += (path) ? "; path="+path : "";
  cook += (secure) ? "; secure"; */
  document.cookie = cook;
}

// , domain, expires, path, secure

function getCookie(name){
  var i=0;  //Suchposition im Cookie
  var suche = name+"=";
  while (i<document.cookie.length) {
    if (document.cookie.substring(i, i+suche.length)==suche) {
      var ende = document.cookie.indexOf(";", i+suche.length);
      ende = (ende>-1) ? ende : document.cookie.length;
      var cook = document.cookie.substring(i+suche.length, ende);
      return unescape(cook);
    }
    i++;
  }
  return null;
}

function eraseCookie(name){
   var cook="name="+name+"; expires=Thu, 01-Jan-70 00:00:01 GMT"
   // cook += (domain) ? "domain="+domain : ""
   // cook += (path) ? "path="+path : ""
   document.cookie = cook
}