Yup, there's a couple of options. You can simply add the tag {JFBCLogin} anywhere you want the Javascript 'blue button' to show.
Alternatively, you can use the following code if you want to show a custom image for the login button:
<a href="javascript:void(0)" onclick="jfbc.login.login_custom();"><img src="/linktoimage.jpg" /></a>
Hope that helps, but if you need anything else, just let me know.
Thanks,
Alex