Ok, so a good hack is to prepare a second fake button that does nothing:
<form action="lol.php" method="POST">
<input type="text" name="fe" />
<input type="button" id="submitbtnDisabled" disabled="disabled" value="submit" style="display:none;" />
<input type="submit" id="submitbtn" value="submit" onclick="this.style.display='none'; document.getElementById('submitbtnDisabled').style.display='inline';" />
</form>
Note:
, jQuery, JavaScript. - unbotrusive JavaScript CSS , HTML.