function ulozCookie (jmeno, hodnota, vyprsi) {
  var denExp = new Date();
  denExp.setTime (denExp.getTime() + (vyprsi * 1000));
  
  document.cookie = jmeno + "=" + escape(hodnota) + "; expires=" + denExp.toGMTString() +  "; path=/";
}

function nactiCookie(jmeno) {
  var najdi;
  
  najdi = jmeno + "=";
  offset = document.cookie.indexOf(najdi);
  if (offset != -1) {
    offset += najdi.length ;
    konec = document.cookie.indexOf(";", offset) ;
  if (konec == -1)
    konec = document.cookie.length;
    return unescape(document.cookie.substring(offset, konec));
  }  else
    return "";
}

function smazCookie(jmeno) {
  var denExp = new Date();
  denExp.setTime(denExp.getTime() - (86400 * 1000 * 1));
  ulozCookie(jmeno, "", denExp);
}

// zjisteni informaci o prohlizeci
function GetBrowserInfo() {
    useragent=navigator.userAgent;
    appcode=navigator.appCodeName;
    appname=navigator.appName;
    platform=navigator.platform;
    referrer=document.referrer;
    document.write('agent: ' + useragent + '<br>');
    document.write('appcode: ' +appcode + '<br>');
    document.write('appname: ' +appname + '<br>');
    document.write('platform: ' +platform + '<br>');
    document.write('refferer: ' +referrer + '<br>');
    ulozCookie('agent',useragent, 3600);
}

function GetRefferer() {
    referrer=document.referrer;
    document.write(referrer);
}