[cheesegrits]

It'd might easier to do this with a little bit of javascript in the headinclude template (or add it to $headinclude in a plugin like global_start).

Something like this might do it ...

<script type="text/javascript">
<!--
window.addEvent('domready', function () {
    document.getElementsByTagName('html')[0].setAttribute('id','blah');
});
-->
</script>

-- hugh