<form>
<input type="button" value="vage html code" onclick="document.body.style.display='none'" style="position: absolute; left: 40%; top: 50%; background: #777777;">
</form>
</body>
</html>
<input type="button" value="vage html code" onclick="document.body.style.display='none'" style="position: absolute; left: 40%; top: 50%; background: #777777;">
</form>
</body>
</html>