this can use a meta tag to get the browser to reload the current page.

the following code will reload the page every 30 seconds. usually you have to add meta tags into the header of your page, not sure if they work in the body.

<meta http-equiv="refresh" content="30">

edit: actually the meta tag can be added in the middle of the page, and it still works, there is one on this page for every 10 seconds and you can see the loading bar reload, so seems to work, who knew. ;)