title: Centering a dropdown menu on the page
body: <p>I have a top bar dropdown-menu in my bootstrap homepage.
  The dropdown-menu starts under each menuitem.
  I want to center the dropdownmenu on the page. (should start on the left side and end on the right side of my content-area which is 1280px)</p>
  
  <p>HTML:</p>
  
  <pre><code>        &lt;div class="navbar"&gt;
            &lt;div class="navbar-inner"&gt;
              &lt;div class="container" style="width: 1280px;"&gt;
                &lt;ul class="nav" role="navigation"&gt;
                  &lt;li class="dropdown"&gt;
                    &lt;a id="drop1" href="#" class="dropdown-toggle menuitem" data-toggle="dropdown"&gt;nav1&lt;/a&gt;
                    &lt;ul class="dropdown-menu" aria-labelledby="drop1" style="width:1180px;"&gt;
                      &lt;li role="presentation"&gt;&lt;a role="menuitem" tabindex="-1" href="http://google.com"&gt;Action&lt;/a&gt;&lt;/li&gt;
                      &lt;li role="presentation"&gt;&lt;a role="menuitem" tabindex="-1" href="#anotherAction"&gt;Another action&lt;/a&gt;&lt;/li&gt;
                     &lt;/ul&gt;
                  &lt;/li&gt;
  
              &lt;/div&gt;
            &lt;/div&gt;
          &lt;/div&gt; 
  </code></pre>