I have found many ways to do the timing with setInterval and some ways of refreshing the DIV with refreshDiv

What I am trying to do is have a Div refresh every 5 min. If changes are made to the Div, the page will show it. I can not do a full page reload because i have a media player on the page and if the payer is active, I do not want it to be effected.

Here is my code. Where the ? is, is where I am lost.

Code HTML4Strict:
<script langauge="javascript">  
            window.setInterval("refreshDiv()", 5000);  
            function refreshDiv()
                counter = counter + 1;  
                document.getElementById("streamTitle").innerHTML = ?       ;  
<div id="streamTitle">Testing </div>

I know the HTML, Head< and Body tags are not there.