DOM Document

<!DOCTYPE html>
<html>
<body>

<script>
document.write("Hello World!");
</script>

<p>Click the button to get the contents of the script element with id="myScript".</p>

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

<p id="demo"></p>

<script id="myScript">
function myFunction() {
  var x = document.scripts.namedItem("myScript").text;
  document.getElementById("demo").innerHTML = x;
}
</script>

</body>
</html>