<!DOCTYPE html>
<html>
<body>
<h1>Simple Example of javascript</h1>
<p id="demo">Test</p>
<button type="button" onclick='document.getElementById("demo").innerHTML = "Hello JavaScript!"'>Click Me!</button>
</body>
</html>
it will display out
<html>
<body>
<h1>Simple Example of javascript</h1>
<p id="demo">Test</p>
<button type="button" onclick='document.getElementById("demo").innerHTML = "Hello JavaScript!"'>Click Me!</button>
</body>
</html>
it will display out
Simple Example of javascript
Hello JavaScript!
