title: Strange javascript issue
body: <p>Please take a look at this fiddle</p>
  <p><a href="http://jsfiddle.net/Qstuw/7/" rel="nofollow noreferrer">http://jsfiddle.net/Qstuw/7/</a></p>
  <p>First answer is selected by default, when you enter to the page. Try to select second answer. Then return to 1st and select it again. I don't understand what am I missing, but I can't select first answer again. Any suggestion?</p>
  <h1>UPDATE</h1>
  <p>Based on first answer:</p>
  <p>True answer must be &quot;switched&quot; between answers. Like on SO. All other buttons must be enabled when you click on some active button and the button on whitch you have clicked must be disabled. Green border only on answer where you've clicked</p>