callbacks.js

    $(".saved-cc-button").click(function () {
      $("#savedpayer").hide();
      $("#paying").show();
      $.ajax({
              type: 'POST',
              url: '/stripe',
              data: { loggedinid : <%= current_user.id %> },
              headers: {
                'X-Transaction': 'POST Example',
                'X-CSRF-Token': $('meta[name="csrf-token"]').attr('content')
              },
              success: function(msg) {
                //$("#paying").hide();
                //console.log(msg);
                alert("payment recieved");
              },
              error: function(a, b, c) {
                console.log(a, b, c);
              }
            });
    });

rails_controller.rb

  #POST '/stripe'
  def stripe
    # remember to change secret key to live key
    Stripe.api_key = "M3t0pd80EUGG0ocyWtpoFqKBZsVyNsmE"
    puts "HELLO@!!"
    puts params
    puts current_user
    puts session
    puts "HELLO!!!"
    if params[:stripeToken]
      # get the credit card details submitted by the form
      token = params[:stripeToken]

      # create a customer
      customer = Stripe::Customer.create(
        :card => token,
        :description => current_user.id
      )

      # save the stripe_id to the user model
      current_user.stripe_id = customer.id
      current_user.save
    end

    # create the charge on Stripe's servers - this will charge the user's card
    charge = Stripe::Charge.create(
      :amount => 100, #amount in cents, again
      :currency => "usd",
      :customer => current_user.stripe_id
    )

    render :js => "alert(OK!);"
  end