title: How can I pre-toggle a button in Bootstrap's btn-group?
body: <p>How can I deploy the Radio Button group and make one of the buttons pre-toggled?</p>
  
  <p>I have a radio-buttons group with days of the weeks values. This one:</p>
  
  <pre><code>&lt;div class="btn-group" data-toggle="buttons-radio"&gt;
    &lt;button class="btn" id="test0"&gt;Mon&lt;/button&gt;
    &lt;button class="btn" id="test1"&gt;Tue&lt;/button&gt;
    &lt;button class="btn" id="test2"&gt;Wed&lt;/button&gt;
    &lt;button class="btn" id="test3"&gt;Thu&lt;/button&gt;
    &lt;button class="btn" id="test4"&gt;Fri&lt;/button&gt;
    &lt;button class="btn" id="test5"&gt;Sat&lt;/button&gt;
    &lt;button class="btn" id="test6"&gt;Sun&lt;/button&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p>What I need is to fetch the current day value (using <code>var currentDay = new Date().getDay()</code>) and <code>toggle</code> (activate) the corresponding button in the group.</p>
  
  <p>And I'm trying to toggle it with the next code (just in testing purposes):</p>
  
  <pre><code>$("#test0").button('toggle')
  </code></pre>
  
  <p>This is not working.</p>