in the old days of simple html, since I was never a web expert, I used to produce pages that looked like this :-
<html>
<head>
<title> Karthik Ravi - Graph of x vs y </title>
<meta http-equiv="refresh" content="30" >
</head>
<body>
<!--
</body>
</html>
note the meta tag :-)
auto refresh can be disabled in browsers, and this was pretty simple, but it did for us non web guru's