title: Bootstrap btn-block not working
body: <p>I'm trying to expand the submit button so that it is the size of the password field. I am using the code btn-block but it's not working.</p>
  
  <pre><code>&lt;div class="container"&gt;
    &lt;div class="row" style="margin-top:60px;"&gt;
      &lt;div class="col-md-4 col-md-offset-4"&gt;
  
  
        &lt;div class="span12" style="text-align:center; margin: 0 auto;"&gt;
          &lt;form class="form-horizontal" style="width: 400px; margin: 0 auto;" method="post"&gt;
            &lt;fieldset&gt;
              &lt;h3 style="color:dimgray;" class="sign-up-title"&gt;
                Bem-vindo de volta! Efetue seu login
              &lt;/h3&gt;
              &lt;hr class="colorgraph"&gt;
              &lt;legend&gt;
                Efetue seu login
              &lt;/legend&gt;
              &lt;div style='display:none'&gt;
                &lt;input type='hidden' name='csrfmiddlewaretoken' value='ImQqDNXbmiVQKGo3OsZlrepAzwfAu70B' /&gt;
              &lt;/div&gt;
              &lt;tr&gt;
                &lt;th&gt;
                  &lt;label for="id_username"&gt;
                    Usuário:
                  &lt;/label&gt;
                &lt;/th&gt;
                &lt;td&gt;
                  &lt;input id="id_username" type="text" name="username" maxlength="30" /&gt;
                &lt;/td&gt;
              &lt;/tr&gt;
              &lt;tr&gt;
                &lt;th&gt;
                  &lt;label for="id_password"&gt;
                    Senha:
                  &lt;/label&gt;
                &lt;/th&gt;
                &lt;td&gt;
                  &lt;input type="password" name="password" id="id_password" /&gt;
                &lt;/td&gt;
              &lt;/tr&gt;
  
              &lt;div  class="buttonHolder"&gt;
                &lt;input type="submit" value="Entrar" class="btn btn-large btn-success btn-block" id="submit-login"/&gt;
              &lt;/div&gt;
            &lt;/fieldset&gt;
          &lt;/form&gt;
        &lt;/div&gt;
      &lt;/div&gt;
    &lt;/div&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p><img src="https://i.stack.imgur.com/MjbH3.png" alt="http://i60.tinypic.com/2n7fpz5.png"></p>