krouzek:funkce [Kroužek Javascriptu]

<!DOCTYPE html>
<html lang="cs">
<head>
    <meta charset="utf-8" />
    <title>Louka</title>
 
    <script>
    /* <![CDATA[ */
    /* Sem prijde javascript kod */
 
    var louka = {
      sezranaTrava: 0,
      pocetBlech: 10
     }
 
    function krecek(stav){
      console.log("Chramst "+Math.random())
      stav['sezranaTrava'] += 1
    }
 
    krecek(louka)   
    krecek(louka)
    krecek(louka)
    krecek(louka)
 
    console.log("sezrana trava:" + louka['sezranaTrava']) 
    console.log("blechy:" + louka['pocetBlech'])
 
    /* ]]> */
    </script>
</head>
 
<body>
 
</body>
</html>