app/views/users/sessions/show.html.erb
<div id="signin-successful" class="signin-successful">
<%= _("You're in. <a href=\"#\" id=\"send-request\">Continue sending your request</a>") %>
</div>
<script type="text/javascript">
parent.modal_signin_successful = true;
$("#send-request").click(function() {
parent.$.fancybox.close(); return false;
});
</script>