Why bootstrap navigation button does not expand? I am trying to created a simple responsive theme using bootstrap but got stock at navigation bar in Drupal 6 and basic theme. Here is the navbar that I've put in page.tpl.php:

&lt;div class="navbar navbar-default navbar-fixed-top"&gt;
  &lt;div class="container"&gt;
&lt;div class="navbar-header"&gt;
  &lt;button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-collapse"&gt;
    &lt;span class="icon-bar"&gt;&lt;/span&gt;
    &lt;span class="icon-bar"&gt;&lt;/span&gt;
    &lt;span class="icon-bar"&gt;&lt;/span&gt;
  &lt;/button&gt;
  &lt;a class="navbar-brand" href="#"&gt;MySite&lt;/a&gt;

 &lt;/div&gt;
  &lt;div class="navbar-collapse collapse"&gt;
&lt;ul class="nav navbar-nav"&gt;
  &lt;li&gt;&lt;a href="#"&gt;Home&lt;/a&gt;&lt;/li&gt;
  &lt;li&gt;&lt;a href="#"&gt;About&lt;/a&gt;&lt;/li&gt;
  &lt;li&gt;&lt;a href="#"&gt;Tutorials&lt;/a&gt;&lt;/li&gt;
&lt;/ul&gt;
  &lt;/div&gt;
&lt;/div&gt;


I have removed all the native css and js files. Instead I have placed bootstrap.css, bootstrap.min.js and jquery-1.10.2.min.js into the theme and defined them for info and template.php. In the rendered page source I can see that all the 3 are loaded. 

When I shrink the window, the navigation links collpase to button but then the button does not respond to on click to expected and show links. 
I also tried the very bootstrap example navbar but the button and drop-down menus does not work either.

What could be wrong here? 

Can see in the source of the page that all the three are loaded.
The problem is in JavaScript: you should not include jQuery (and generally other libraries) through your theme.

Bootstrap requires newer versions of jQuery (I think v1.8+) and you should use jQuery Update module to upgrade it on your site.