title: Collapse / Expand collapsibles dynamically
body: <p>I create a little list of jQuery Monile collapsibles. This is the structure:</p>
  
  <pre><code>&lt;div data-role="collapsibleset" data-theme="a" data-content-theme="a"&gt;
  
     &lt;div data-role="collapsible"&gt; 
        Text content
     &lt;/div 
  
    &lt;div data-role="collapsible"&gt;
       Text content
     &lt;/div &gt;
  
  &lt;/div &gt;
  </code></pre>
  
  <p>How can I open all collapsible elements at once when click a button?</p>