You'll have to know where the location of the page that processes cpanel at your host is. You
might be able to get this information by going to your cpanel and clicking cancel insstead of logging in. Then if a form is there, view the source.
It might say something like "/login" in the <form action="/login"> part. If so, you'll need to copy and paste the entire domain URL with "/login" appended to it in your action property of the form. For example, if your domain was "http://sample.com" and the cpanel was on port 1092 (
http://www.sample.com:1092) and your cpanel form action said "/login" when you clicked cancel, you'd want to use this for your form action:
HTML Code:
<form action="http://sample.com:1092/login" method="POST">
Username
<input type="text" name="user" size="16">
Password
<input type="password" name="pass" size="16">
<input type="submit" value="Login">
</form>
Sorry I can't be more specific, but it totally depends on how and where cpanel is set up where you're hosted.