<!DOCTYPE html>
<html>
<head>
<style type="text/css">
div#box1
{
background-color : Gray;
height:200px;
width : 200px;
}
</style>
<script type ="text/javascript">
function backcolo(ele, clr) {
var elem = document.getElementById(ele);
elem.style.transition = "background 1.0s linear 0s";
elem.style.background = clr;
}
</script>
<title>Change Background color</title>
</head>
<body>
<button onclick="backcolo('box1','Red');"> Red Color</button>
<button onclick="backcolo('box1','green');"> Green Color</button>
<button onclick="backcolo('box1','orange');"> orange Color</button>
<div id="box1">Paste your content here</div>
</body>
</html>
<html>
<head>
<style type="text/css">
div#box1
{
background-color : Gray;
height:200px;
width : 200px;
}
</style>
<script type ="text/javascript">
function backcolo(ele, clr) {
var elem = document.getElementById(ele);
elem.style.transition = "background 1.0s linear 0s";
elem.style.background = clr;
}
</script>
<title>Change Background color</title>
</head>
<body>
<button onclick="backcolo('box1','Red');"> Red Color</button>
<button onclick="backcolo('box1','green');"> Green Color</button>
<button onclick="backcolo('box1','orange');"> orange Color</button>
<div id="box1">Paste your content here</div>
</body>
</html>
Code generate the following code
