I have an ad script running, which is hardcoded into my HTML. Now I want to refresh that ad tag after 240 seconds. Easy way would be to simply load the ad tag in an iframe, and put a refresh on that, but iframes cannot be used in my case.
Right now the ad tag loads like this:
    <div class="banner_728">
        <script type="text/javascript"><!--
            bb = new Object();
            bb.size = "728x90";
        //--></script>
        <script type="text/javascript" src="//adserver.com/tags/tags.js"></script>
    </div>
How could I re-execute that javascript after a set amount of seconds, whilst leaving that ad-tag hardcoded into my site.
 
    