<!DOCTYPE html>
<html lang="en-US">
<body>
<p>Click the button to display the doctype name of this document.</p>
<button onclick="myFunction()">Click Me</button>
<p id="point"></p>
<script>
var x = document.getElementById("point");
function myFunction(){
x.innerHTML = document.doctype.name;
}
</script> </body>
</html>