<!DOCTYPE html> <html> <body> <button id="demo" onclick="myFunction()">Click me to change my HTML content (innerHTML).</button> <script> function myFunction() { document.getElementById("demo").innerHTML = "Paragraph changed!"; } </script> </body> </html>
var btn = document.getElementById("mybtn"); btn.value = 'my value'; // will just add a hidden value btn.innerHTML = 'my text';