Bug 33513

If submitting a form in onsubmit handler, the submitting may be failed! Bug's source: open www.sina.com.cn, loginin free email. Test case like this: <script> function chkLogin(){ document.showLogin.submit(); // note document.showLogin.password.value = ""; return false; } </script> <form name="showLogin" method="post" action="test.php" onsubmit="return chkLogin();" target="_blank"> UserName:<input type="text" name="username" value="" /><br> Password:<input name="password" type="password" /><br> <input type="submit" value="Login" /><br> </form> After chkLogin is executed, the password is empty and HTMLFormElement executes real submiting action after dispatching sumbit event, so the submitting failed.