Facebook Connect Login Buttons
From Facebook Developer Wiki
The Facebook Connect login button rendered by fb:login-button can be customized to suit your site.
The easiest way to style the button is to use the Facebook Connect Wizard.
Note: If you're developing a Facebook Connect for iPhone app, use the buttons below.
[edit] Rendering the Button Manually
While Facebook recommends you use XFBML to render a login button, we don't require it. You can render the button manually by referencing this CSS file on your page: http://www.facebook.com/css/connect/connect_button.css, then specifying the desired image from the style sheet as the class. For example:
<a href="#" onclick="FB.Connect.requireSession(); return false;" class="fbconnect_login_button FBConnectButton FBConnectButton_Small">
<span id="RES_ID_fb_login_text" class="FBConnectButton_Text">Connect with Facebook</span>
</a>
[edit] Facebook Connect for iPhone Buttons
If you're developing a Facebook Connect for iPhone app, use the following buttons. For usage guidelines, read the Facebook Connect for iPhone policies.
: Use either this image or the Connect with Facebook image to connect users.
: Use either this image or the Connect image to connect users.
: Use the official favicon over your users' profile pictures. (Download the actual image from Image:Facebook favicon.eps.)
: Use this image as the button to let your connected users log out of your site and Facebook.
