destroy.js.rjs

if @category.jobs.empty?
  page[@category.dom_id].visual_effect :fade, @category.dom_id
  page.delay(1) do
    page.remove @category.dom_id
  end
  page.replace_html "categories", :partial => 'admin/categories/list'
  page.display_notice
else
  page.alert("You cannot delete this category because there are jobs in this category!")
end