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You do not need to have the code in the body tag. Just add this snippet below and it should work no matter where it is in the page.
<script type="text/javascript">
setInterval('window.location.reload()', 60000);
</script>
As long as you can access the HTML some where and your editor doesn't filter out tags you should be fine. If your editor has a separate area for JavaScript code then just enter setInterval line. :)