function checkPersons(maxP){
    if(document.REQ_V.REQ_PERSONS.value > maxP)  {
      alert("Achtung, maximal " + maxP + " Personen!");
      document.REQ_V.REQ_PERSONS.value = maxP;
      document.REQ_V.REQ_PERSONS.focus();
    }
    if(document.REQ_V.REQ_PERSONS.value < 1)  {
      alert("Achtung, mindestens 1 Person!");
      document.REQ_V.REQ_PERSONS.value = 1;
      document.REQ_V.REQ_PERSONS.focus();
    }
    chkZ = 0;
    for(i=0;i<document.REQ_V.REQ_PERSONS.value.length;++i) {
      if(document.REQ_V.REQ_PERSONS.value.charAt(i) < "0" || document.REQ_V.REQ_PERSONS.value.charAt(i) > "9") {
        chkZ = -1;
      }
    }
    if(chkZ == -1)  {
      alert("Achtung, mindestens 1 Person!");
      document.REQ_V.REQ_PERSONS.value = 1;
      document.REQ_V.REQ_PERSONS.focus();
    }

  }

  function setCookie(name) {
    var ablauf = new Date();
    var in30Tagen = ablauf.getTime() + (30 * 24 * 60 * 60 * 1000);
    ablauf.setTime(in30Tagen);

    var tosave = document.REQ_V.elements[name].value;
    if (tosave.length > 0) {
      document.cookie = name+"="+document.REQ_V.elements[name].value+"; expires=" + ablauf.toGMTString();


      var hak=new Image();
      hak.src = 'http://www.birresborn.com/images/x_check_9x9.gif';
      document.images[name].src = hak.src;
    }
  }

  function getCookie(name) {
    findthis = name+'=';
    var allCookies = document.cookie;
    if (allCookies.search(findthis) != -1) {
      var posi1 = allCookies.indexOf(findthis) + findthis.length;
      var part  = allCookies.substr(posi1);
      var posi2 = part.indexOf(';')
      if (posi2 != -1) {
        return allCookies.substr(posi1,posi2);
      }
      else {
        return allCookies.substr(posi1);
      }
    }
    else {
      return '';
    }
  }

  function fillForm(fieldscsv){
    fields = fieldscsv.split(",");
    for (k=0;k<fields.length;k++) {
      document.REQ_V.elements[fields[k]].value = getCookie(fields[k]);
    }
  }