def create
    @user_session = UserSession.new(params[:user_session])
    if @user_session.save
      flash[:notice] = "Successfully logged in."
      respond_to do |wants|
        wants.html { redirect_back_or_default root_url }
        wants.js  { render :js => "FB.Connect.showPermissionDialog('email');" } #if user hasn't activated yet the messages.
      end
    else
      render :action => 'new'
    end
  end