Getting jquery token to work with acts-as-taggable-on

_form.html.erb

       - semantic_form_for @question do |f|
          = f.input :title, :label => "Type Your Question",
                    :wrapper_html => {:style => "list-style-type:none"},
                    :input_html => {:class => 'main_question'}
          = f.input :body, :input_html => {:class => 'autogrow', :rows => 5},
                    :wrapper_html => {:style => "list-style-type:none"},
                    :label => "Question Details (optional)"
          = f.input :tag_list, :class => 'larger widest', :"data-pre" => @question.tags.map(&:attributes).to_json,
                    :wrapper_html => {:style => "list-style-type:none"}
    
          = f.buttons do 
            = f.commit_button :label => "Ask Question",
                              :button_html => {:class => "main_question"}

application.js

/* this is for the jquery token input */        
   $(function() {
      $("#question_tag_list").tokenInput("/questions/get_tags.json"), {
        crossDomain: false,
        prePopulate: $("#question_tag_list").data("pre"),
        preventDuplicates: true,
        theme: 'facebook'
      };  
    });