diff --git a/README.md b/README.md
index 2c509e5..b79ca04 100644
--- a/README.md
+++ b/README.md
@@ -5,19 +5,6 @@ Include BootstrapHelper in Gemfile:
 gem 'bootstrap-helper',git: 'git://github.com/niedhui/bootstrap-helper.git'
 ```
 
-# topbar(Navigation)
-``` ruby
-- topbar do |bar|
-  = bar.brand_name "YourBrandName",root_path
-  = bar.nav do
-    = bar.item 'label1',               "/url/url"
-    = bar.dropdown "dropdown_menu" do
-      = bar.item 'label2',              "/url2/url2"
-      = bar.item 'label3',              "/url3/url3"
-  = bar.second_nav do     
-    = bar.item 'label4',               "/url4/url4"
-```
-
 # modal
 ``` ruby
 - modal id: "my_modal" do |m| 
@@ -43,3 +30,96 @@ gem 'bootstrap-helper',git: 'git://github.com/niedhui/bootstrap-helper.git'
     %li.divider
     %li= link_to "nihao"
 ```
+
+# tabs
+```ruby
+  <% tabs do |tab| %>
+    <%= tab.item "Tabs 1", { :active => true } do %>
+      <h1>Title 1</h1>
+      <p>Content 1</p>
+    <% end %>
+    <%= tab.item "Tabs 2" do %>
+      <h1>Title 2</h1>
+      <p>Content 2</p>
+    <% end %>
+  <% end %>
+```
+
+# navbar
+
+Simple use :
+
+```ruby
+  <% navbar do |bar| %>
+
+    <%= bar.brand_name "YourBrandName", root_path %>
+    
+    <%= bar.nav do %>
+      <%= bar.item 'item', '#', { :active => true } %>
+      <%= bar.divider( :vertical => true ) %>
+      <%= bar.dropdown 'Title 1' do %>
+        <%= bar.header "Items a" %>
+        <%= bar.item 'item 1', '#' %>
+        <%= bar.item 'item 2', '#' %>
+        <%= bar.divider %>
+        <%= bar.item 'item 3', '#' %>
+        <%= bar.header "Items b" %>
+        <%= bar.item 'item 4', '#' %>
+        <%= bar.item 'item 5', '#' %>
+      <% end %>
+    <% end %>
+    
+  <% end %>
+```
+
+Or you can use like this :
+
+
+```ruby
+  <% topbar( :inverse => true, :id => 'topBar' ) do |bar| %>
+
+    <%= bar.collapse %>
+    <%= bar.brand_name "YourBrandName", root_path %>
+
+    <%= bar.nav( :right => true ) do %>
+      <%= bar.dropdown( :class => 'highlight' ) do %>
+        <%= bar.dropdown_title do %>
+          <span class="count">10</span>
+          <span class="title">Title 2</span>
+        <% end %>
+        <%= bar.dropdown_menu( :right => true ) do %>
+          <%= bar.header do %>
+            <span class="title">Items a</span>
+          <% end %>
+          <%= bar.item do %>
+            <span class="title">Item 3</span>
+          <% end %>
+          <%= bar.item 'item 4', '#' %>
+          <%= bar.header "Items b" %>
+          <%= bar.item '/link' do %>
+            <span class="title">Item 5</span>
+            <span class="count">15</span>
+          <% end %>
+        <% end %>
+      <% end %>
+    <% end %>
+    
+  <% end %>
+```
+
+Optional display variations :
+
+
+```ruby
+<% navbar do |bar| %>
+  ...
+<% end %>
+
+<% topbar do |bar| %>
+  ...
+<% end %>
+
+<% bottombar do |bar| %>
+  ...
+<% end %>
+```
\ No newline at end of file
diff --git a/lib/bootstrap-helper/builders/alert.rb b/lib/bootstrap-helper/builders/alert.rb
new file mode 100644
index 0000000..98a7926
--- /dev/null
+++ b/lib/bootstrap-helper/builders/alert.rb
@@ -0,0 +1,27 @@
+module BootstrapHelper
+  module Builders
+    class Alert
+      attr_accessor :template, :items
+
+      def initialize(template, options = {}, &proc)
+        @template, @items = template,  []
+        render(options, &proc)
+      end
+
+      def render(options, &proc)
+        buffer = template.capture(self, &proc)
+        template.concat(wrapper(options,buffer))
+      end
+
+      def wrapper(options, buffer)
+        klass = options[:type].nil? ? ['alert'] : ["alert alert-#{options[:type]}"]
+        klass << options[:klass] || ''
+        
+        template.content_tag(:div, class: klass) do
+          template.content_tag(:button, template.raw('&times;'), :type => 'button', class: 'close', 'data-dismiss' => 'alert') + buffer
+        end
+      end
+      
+    end
+  end
+end
\ No newline at end of file
diff --git a/lib/bootstrap-helper/builders/navbar.rb b/lib/bootstrap-helper/builders/navbar.rb
index 19ea670..e0543db 100644
--- a/lib/bootstrap-helper/builders/navbar.rb
+++ b/lib/bootstrap-helper/builders/navbar.rb
@@ -10,48 +10,114 @@ def initialize(template, options = {}, &proc)
 
       def render(options, &proc)
         buffer = template.capture(self, &proc)
-        template.concat(wrapper(options,buffer))
+        template.concat(wrapper(options, buffer))
       end
 
-      def wrapper(options ,buffer)
-        navbar_class = ["navbar"]
-        navbar_class << "navbar-fixed-top" if options[:top]
-        template.content_tag(:div, class: navbar_class, "data-dropdown" => "dropdown") do
-          template.content_tag(:div, class: "navbar-inner") do
-            template.content_tag(:div, buffer,class: "container")
-          end
+      def wrapper(options, buffer)
+        navbar_class = ['navbar']
+        navbar_class << 'navbar-fixed-top' if options[:top]
+        navbar_class << 'navbar-fixed-bottom' if options[:bottom]
+        navbar_class << 'navbar-inverse' if options[:inverse]
+        id = options[:id] || ''
+        
+        template.content_tag(:div, class: navbar_class, 'data-dropdown' => 'dropdown', :id => id) do
+          template.content_tag(:div, buffer, class: 'navbar-inner')
         end
       end
 
-      def brand_name(name,link = "#",options = {})
+      def brand_name(name, link = '#', options = {})
         template.link_to name, link, class: 'brand'
       end
-
-      def nav(options = {},&block)
+      
+      def nav(options = {}, &block)
         buffer = template.capture(self, &proc)
-        template.content_tag(:ul,buffer, class: "nav") 
+        klass = ['nav']
+        klass << 'pull-right' if options[:right]
+        klass << 'pull-left' if options[:left]
+        klass_ul = ['nav']
+        klass_ul << options[:class] || ''
+        
+        template.content_tag( :nav, class: klass ) do
+          template.content_tag( :ul, buffer, class: klass_ul)
+        end
       end
 
-      def second_nav(options = {},&block)
+      def second_nav(options = {}, &block)
+        ActiveSupport::Deprecation.warn("use nav instead of second_nav")
+        nav(options.merge(:right => true), &block)
+      end
+      
+      def dropdown(*args, &proc)
+        if args.first.class == Hash
+          options = args.first
+        else
+          title = args.first
+          options = args.second || {}
+        end
+        
+        body = template.capture(self, &proc)
+        klass = ['dropdown']
+        klass << options[:class] unless options[:class].nil?
+        
+        unless title.nil?
+          body = dropdown_title(title, options, &proc)
+          body << dropdown_menu(options, &proc)
+        end
+        
+        template.content_tag(:li, body, class: klass)
+      end
+      
+      def dropdown_title(title = nil, options = {}, &block)
+        body = title.nil? ? template.capture(self, &proc) : title.html_safe
+        body << template.content_tag(:b, nil, class: 'caret')
+        
+        template.link_to(body, '#', class: 'dropdown-toggle', 'data-toggle' => 'dropdown')
+      end
+      
+      def dropdown_menu(options = {}, &block)
         buffer = template.capture(self, &proc)
-        template.content_tag(:ul,buffer, class: ["nav","pull-right"])
+        klass = ['dropdown-menu']
+        klass << 'pull-right' if options[:right]
+
+        template.content_tag(:ul, buffer, class: klass)
       end
 
-      def dropdown(title,options = {},&proc)
-        buffer = template.capture(self, &proc)
-        template.content_tag(:li,class: 'dropdown') do
-          link = template.link_to  "#",class: 'dropdown-toggle',"data-toggle" => "dropdown" do
-            title.html_safe + template.content_tag(:b,"",class: 'caret')
-          end
-          link << template.content_tag(:ul,buffer, class: "dropdown-menu")
+      def item(*args, &block)
+        if block_given?
+          body = template.capture(self, &proc)
+          url = args.first || '#'
+          options = args.second || {}
+        else
+          body = args[0]
+          url = args[1] || '#'
+          options = args[2] || {}
+        end
+        
+        klass = options[:class] || []
+        klass << 'active' if options[:active]
+        data_toggle = options[:url_data_toggle] || ''
+        
+        template.content_tag(:li, class: klass) do
+          template.link_to(body, url, 'data-toggle' => data_toggle)
         end
       end
 
-      def item(title,link,options = {})
-        template.content_tag(:li,template.link_to(title,link))
+      def collapse
+        template.content_tag(:button, nil, :class => 'btn btn-navbar collapsed', "data-toggle" => 'collapse', 'data-target' => '.nav-collapse') do
+          3.times.map { template.content_tag :span, nil, class: 'icon-bar' }.inject(:+)
+        end
       end
-
+      
+      def divider(options = {})
+        klass = "divider#{options[:vertical] ? '-vertical' : ''}"
+        template.content_tag :li, nil, class: klass
+      end
+      
+      def header(title = nil, &block)
+        body = title.nil? ? template.capture(self, &proc) : title
+        template.content_tag :li, body, class: 'nav-header'
+      end
+      
     end
   end
-end
-
+end
\ No newline at end of file
diff --git a/lib/bootstrap-helper/builders/tabs.rb b/lib/bootstrap-helper/builders/tabs.rb
new file mode 100644
index 0000000..ff68151
--- /dev/null
+++ b/lib/bootstrap-helper/builders/tabs.rb
@@ -0,0 +1,69 @@
+module BootstrapHelper
+  module Builders
+    class Tabs
+      attr_accessor :template, :items
+
+      def initialize(template, options = {}, &proc)
+        @template, @items = template,  []
+        render(options, &proc)
+      end
+
+      def render(options, &proc)
+        buffer = template.capture(self, &proc)
+        template.concat(wrapper(options,buffer))
+      end
+
+      def wrapper(options, buffer)
+        klass = options[:class] || 'nav-collapse'
+
+        template.content_tag( :div, class: "tabbable" ) do
+          content = template.content_tag( :div, :class => 'navbar' ) do
+            content_div = collapse({:class => klass})
+            content_div << tabs_titles({:class => klass}) do
+              content_items = ''.html_safe
+              items.each do |item|
+                content_items << item_title( item[:name], item[:id], item[:klass], item[:title] )
+              end
+              content_items
+            end
+          end
+          
+          content << template.content_tag( :div, class: "tab-content" ) do
+            buffer
+          end
+        end
+      end
+
+      def collapse(options = {})
+        template.content_tag(:button, nil, :class => 'btn btn-navbar', "data-toggle" => 'collapse', 'data-target' => ".#{options[:class]}", :type => 'button') do
+          3.times.map { template.content_tag :span, nil, class: 'icon-bar' }.inject(:+)
+        end
+      end
+
+      def tabs_titles(options = {}, &block)
+        buffer = template.capture( self, &proc )
+        template.content_tag( :ul, buffer, class: "nav nav-tabs #{options[:class]} collapse" )
+      end
+      
+      def item_title(name, id, klass, title)
+        template.content_tag( :li, nil, class: klass, :title => title ) do
+          template.link_to name, "##{id}", :data => { :toggle => 'tab' }
+        end
+      end
+      
+      def item(name, options = {}, &block)
+        klass = options[:active] ? "active" : ""
+        klass += " #{options[:class]}" unless options[:class].nil?
+        title = options[:title] || ''
+
+        id = name.downcase.parameterize.gsub(/-/, '_')
+        
+        items << { :name => name, :id => id, :klass => klass, :title => title }
+        
+        buffer = template.capture( self, &proc )
+        template.content_tag( :div, buffer, class: "tab-pane #{klass}", :id => id )
+      end
+      
+    end
+  end
+end
\ No newline at end of file
diff --git a/lib/bootstrap-helper/helpers.rb b/lib/bootstrap-helper/helpers.rb
index a477d21..7aa58ce 100644
--- a/lib/bootstrap-helper/helpers.rb
+++ b/lib/bootstrap-helper/helpers.rb
@@ -1,14 +1,18 @@
 module BootstrapHelper
   module Helpers
     autoload :Navbar,     'bootstrap-helper/helpers/navbar'
+    autoload :Tabs,     'bootstrap-helper/helpers/tabs'
     autoload :Modal,     'bootstrap-helper/helpers/modal'
     autoload :Link,     'bootstrap-helper/helpers/link'
     autoload :Table,     'bootstrap-helper/helpers/table'
     autoload :Buttons,     'bootstrap-helper/helpers/buttons'
+    autoload :Alert,      'bootstrap-helper/helpers/alert'
     include Navbar
+    include Tabs
     include Table
     include Modal
     include Link
     include Buttons
+    include Alert
   end
 end
\ No newline at end of file
diff --git a/lib/bootstrap-helper/helpers/alert.rb b/lib/bootstrap-helper/helpers/alert.rb
new file mode 100644
index 0000000..16e2fad
--- /dev/null
+++ b/lib/bootstrap-helper/helpers/alert.rb
@@ -0,0 +1,22 @@
+require "bootstrap-helper/builders/alert"
+module BootstrapHelper
+  module Helpers
+    module Alert
+      def bt_alert(options = {}, &proc)
+        ::BootstrapHelper::Builders::Alert.new(self,options,&proc)
+      end
+      def bt_alert_success(options = {}, &proc)
+        bt_alert(options.merge(type: 'success'), &proc)
+      end
+      def bt_alert_error(options = {}, &proc)
+        bt_alert(options.merge(type: 'error'), &proc)
+      end
+      def bt_alert_warning(options = {}, &proc)
+        bt_alert(options.merge(type: 'block'), &proc)
+      end
+      def bt_alert_info(options = {}, &proc)
+        bt_alert(options.merge(type: 'info'), &proc)
+      end
+    end
+  end
+end
\ No newline at end of file
diff --git a/lib/bootstrap-helper/helpers/navbar.rb b/lib/bootstrap-helper/helpers/navbar.rb
index b93927a..807581d 100644
--- a/lib/bootstrap-helper/helpers/navbar.rb
+++ b/lib/bootstrap-helper/helpers/navbar.rb
@@ -7,7 +7,11 @@ def navbar(options = {},&proc)
       end
       
       def topbar(options = {}, &proc)
-        ::BootstrapHelper::Builders::Navbar.new(self,options.merge(top: true),&proc)
+        navbar(options.merge(top: true),&proc)
+      end
+      
+      def bottombar(options = {}, &proc)
+        navbar(options.merge(bottom: true),&proc)
       end
     end
   end
diff --git a/lib/bootstrap-helper/helpers/tabs.rb b/lib/bootstrap-helper/helpers/tabs.rb
new file mode 100644
index 0000000..61d34c6
--- /dev/null
+++ b/lib/bootstrap-helper/helpers/tabs.rb
@@ -0,0 +1,10 @@
+require "bootstrap-helper/builders/tabs"
+module BootstrapHelper
+  module Helpers
+    module Tabs
+      def tabs(options = {}, &proc)
+        ::BootstrapHelper::Builders::Tabs.new(self,options,&proc)
+      end
+    end
+  end
+end
\ No newline at end of file