t>

<body onload=onBodyLoad()>
    <div id=header></div>
    <div id=tree></div>
    <div id=editor></div>
    <div id=preview style=display:none></div>
    <div id=loading><span id=loading-msg></span>
        <br>
        <div class=spinner-anim>Loading...</div>
    </div>
</body>
</html>