<!DOCTYPE html>
<html lang="en-US">
<head>
<style>
body{
background: lightgreen url("apple.png") no-repeat fixed center;
height: 800px;
}
</style>
</head>
<body>
<h1>CSS background Property</h1>
<button onclick="myFunction()">Click Me</button>
<script>
var x = document.getElementsByTagName("body")[0];
function myFunction(){
x.style.background = "DodgerBlue url('orange.png') no-repeat fixed center";
}
</script>
<p><strong>Note</strong>: Click on the button to change the background.</p> </body>
</html>