Sample js_message javascript call

controller.rb

  # corresponding rails action that handles the js_message call. Note the format.jsm calls in the 
  # respond_to block
  def create
    @task = Task.new(params[:task])

    respond_to do |format|
      if @task.save
        format.html { redirect_to(tasks_path, :notice => 'Task was successfully created.') }
        format.jsm do
          render_js_message(:ok, :html => "it saved!")
        end
      else
        format.html { render :action => "new" }
        format.jsm { render_js_message(:error, :message => "Task could not be saved. Please check your form") }
      end
    end
  end

js_message_example.js

    // Example of using js_message to send a form's data to a rails server
    // This assumes jQuery
    $(function(){ // jQuery's onload function

      $("form.task-form").submit(function(){
        var form = $(this);
        $.jsMessage({
          url: form.attr("action"),
          data: form.serialize(),
          success: function(jsMessage){
            $("#tasks").replaceWith(jsMessage.html);
          },
          error: function(jsMessage){
            alert(jsMessage.message);
          }
        });

        return false;
      });

    });