Este es mi código:

<div id="main-content">
    <script>
        document.title = document.getElementById("main-content-iframe").contentDocument.title;
    </script>
    <iframe name="cstage" src="home.html" width="100%" height="100%" id="main-content-iframe" frameborder="0" onload="document.title=parent.frames['cframe'].document.title;">If you're seeing this message, it means IFrames are not supported; Please enable IFrames or upgrade to a compatible browser that supports IFrames.</iframe>
</div>

No está funcionando, ¿qué estoy haciendo mal?