// type "ok"
function typeok() {
        var prompt_txt = "Type ok in this box.";
        if (prompt(prompt_txt, '') == 'ok') {
                return true;
        }
        else {
                return false;
        }
}

// turn the preview and submit buttons into submits and force the user to type 'ok'
function spamblock()
{
	// type "ok", okay? --- hmm... shouldn't actually need this and the above
	document.getElementById('comments_form').onsubmit = typeok;
}