facebook login button with custom popup

facebook login button with custom popup

i have included a facebook login button like this
<div id="fb-root"></div>
<script>
(function(d, s, id) {
var js, fjs = d.getElementsByTagName(s)[0];
if (d.getElementById(id))
return;
js = d.createElement(s);
js.id = id;
js.src =
"//connect.facebook.net/de_DE/all.js#xfbml=1&amp;appId=592370847463963";
fjs.parentNode.insertBefore(js, fjs);
}(document, 'script', 'facebook-jssdk'));
</script>
<div class="fb-login-button" data-width="200"></div>
but i don't want the default behaviour on click.
is it possible to define my own onclick function for the button?