def tag_cloud
  @tags = Article.tag_counts # returns all the tags used
end

<% tag_cloud Article.tag_counts.sort { |x, y| x.name <=> y.name }, %w(x-small small normal large x-large) do |tag, css_class| %>
  <%= link_to tag.name, tag_url( :tag => tag.name ), :class => css_class %>
<% end %>

module ApplicationHelper
  include TagsHelper
end

module ApplicationHelper
  include TagsHelper
end