<script type="text/javascript">
    var resizeTimer;

    function resizeIFrame() {
        // Ensure that top-bar is always ~46px tall. Allocate remainder to iframe using relative height.
        var topbarHeight = (4600) / $(window).height();
        $("iframe").css("height", (100 - topbarHeight) + "%");
    };

    $(document).ready(function() {
        $(window).resize(function() {
            clearTimeout(resizeTimer);
            resizeTimer = setTimeout(resizeIFrame, 500);
        });

        resizeIFrame();
    });
</script>