puoi farlo con JS, prova così:

codice:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1" />
<title>link random</title>

<script type="text/javascript">
<!--
function webdemorandomlink() {
};

webdemorandomlink = new webdemorandomlink();
number = 0;
// Array
webdemorandomlink[number++] = "html" 
webdemorandomlink[number++] = "html1" 
webdemorandomlink[number++] = "html2" 
webdemorandomlink[number++] = "html3" 
webdemorandomlink[number++] = "html4" 
webdemorandomlink[number++] = "html5" 
// fine Array
increment = Math.floor(Math.random() * number);

//-->
</script>


</head>

<body>
<script type="text/javascript">
document.write(webdemorandomlink[increment]);
</script>

</body>
</html>
per cambiare il link fai il reload della pagina


ciaux