an example of html/css/javascript:
<html>
<head>
<meta charset ='utf-8'>
<title>Hello word!</title>
<style>
div{
height:600px;
weight:600px;
text-align:center;
align:50px auto;
}
</style>
<script>
var content = document.getElementById("text");
content.innerHTML="Hello word!";
</script>
</head>
<body>
<div>
<p id = "text"></p>
</div>
</body>
</html>
