We would like to know how to change header color.
<!DOCTYPE html>
<html>
<head>
<script type='text/javascript'>
window.onload=function(){<!-- ww w. java 2 s. c om-->
var header = document.getElementsByClassName("alg");
header[0].style.color = 'red';
}
</script>
</head>
<body>
<header class="alg">Some text</header>
</body>
</html>
The code above is rendered as follows: