ลองตัวเอง - JavaScript Reference figcaption

<!DOCTYPE html>
<html>
<body>

<h3>A demonstration of how to access a FIGCAPTION element</h3>

<figure>
  <img src="../tags/img_pulpit.jpg" alt="The Pulpit Rock" width="304" height="228">
  <figcaption id="myFigCap">Fig.1 - A view of the pulpit rock in Norway.</figcaption>
</figure>

<p>Click the button to set the color of the caption to red.</p>

<button onclick="myFunction()">Try it</button>

<script>
function myFunction() {
   var x = document.getElementById("myFigCap");
   x.style.color = "red";
}
</script>

</body>
</html>