<!DOCTYPE html>
<html>
<head>
  <title>JavaScript Objects</title>
</head>
<body>
  <p id="person"></p>
  <button onclick="showPerson()">Show Person</button>
  <script>
    let person = {
      firstName: "Jane",
      lastName: "Doe",
      age: 28
    };
    function showPerson() {
      document.getElementById("person").textContent = `Name: ${person.firstName} ${person.lastName}, Age: ${person.age}`;
    }
  </script>
</body>
</html>