No, if you're not using the SCLogin module, the parameters won't work either. Those parameters are only for the instance of the SCLogin module that's shown on the page, not any uses of the {JFBCLogin} tag.
I was mis-understanding above and just figured you were using the SCLogin module. If you're using the {JFBCLogin} tag, you should use the custom login HTML, like:
<a href="javascript:void(0)" onclick="jfbc.login.login_custom();"><img src="/linktoimage.jpg" /></a>
For more information on using a custom image or other type of button, see our
Support questions for Joomla Facebook
thread.
Hope that helps,
Alex