What is the easyiest way to create a tabbed menu?

What is the easiest way in rails to create a tabbed menu?

I was thinking about creating some if statements example:

<li class="<% if current.page = root_url %>currentpage<% end %>">Frontpage</li>
<ul id="submenu">
  <li><b style="text-decoration:underline">Forside 1</b></li>
  <li>Forside 45 </li>
</ul>

Here is my HTML for my menu:

<li>Frontpage</li>
<ul id="submenu">
  <li><b style="text-decoration:underline">Forside 1</b></li>
  <li>Forside 45 </li>
</ul>

<li>Frontpage 2</li>
<ul id="submenu">
  <li><b style="text-decoration:underline">Forside 1</b></li>
  <li>Forside 3 </li>
</ul>

<li>Frontpage 3</li>
<ul id="submenu">
  <li>&开发者_高级运维lt;b style="text-decoration:underline">Forside 1</b></li>
  <li>Forside 3 </li>
</ul>

I just want to style the current li element for the page. Example if a user is on Frontpage 2 the class currentpage is added to the li element for Frontpage 2 or if the user visit a subpage of Frontpage 2 it still have the class.

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The easiest way would be using one gem instead of building it all from the ground up.

Take a look at this section of the ruby toolbox.

If your question is "how do I apply style to the menu", I suggest you create a different question, and tag it "CSS". You will probably get a lot of good answers. I particularly like how the twitter bootstrap css lib does its navigation/tabs.