in javascript has some methods to to change the internal data, style and attributes.
- element.innerHTML
- element.style.style-name
- element.setAttribute
- element.attribute
<!DOCTYPE html>
<html lang='en' xmlns='http://www.w3.org/1999/xhtml'>
<head>
<meta charset='utf-8' />
<title></title>
<style>
.page {
background-color:green;
}
</style>
</head>
<body>
<p id='p2'>Some data is available</p>
<p id='p3'>Some data is available</p>
<p id='p1'>Some data is available</p>
<script>
document.getElementById('p2').innerHTML += ' this is inner HTML';
document.getElementById('p3').setAttribute('class', 'page');
document.getElementById('p1').style.backgroundColor='red';
</script>
</body>
</html>
