title: Quick form - checkbox not getting checked
body: <p>I have just started learning Quick Form . 
  I want to know how can I create a check box using the add element and then align it at some desired place . 
  This is what i tried : </p>
  
  <pre><code>$form-&gt;addElement('checkbox','testCB1', 'Test my check box',array('checked'=&gt;'checked',value =&gt;'10'));
  </code></pre>
  
  <p>But my checkbox is not checked neither it gets a value of 10 .</p>
  
  <p>Thanks in advance :)</p>