Integrate with Sidebar Login widget

for example: in wp-sidebar-login.php

/* Facebook reg-login */
echo '<div class="center"><a title="Login/Register with Facebook account ..." href="http://xxxx.xxx/wp-login.php?loginFacebook=1&redirect=http://xxxx.xxx" onclick="window.location = \'http://xxxx.xxx/wp-login.php?loginFacebook=1&redirect=\'+window.location.href; return false;"><div class="new-fb-btn new-fb-6 new-fb-default-anim"><div class="new-fb-6-1"><div class="new-fb-6-1-1">Login</div></div></div></a></div>';
echo '<div class="center"><em>or</em></div>';
/* END Facebook reg-login */

wp_login_form( $login_form_args );