<head>
<script>
function runTest() {
    document.body.focus();
    document.execCommand("FormatBlock", false, "h1");
    document.execCommand("InsertText", false, "This tests for a bug when performing a FormatBlock inside a body with no visible content.  This text should be inside an h1 element.");
}
</script>
</head>
<body onload="runTest();" contenteditable="true">
</body>