title: What's the best way to append html just once?
body: <p>I want to open a Div and append the Facebook comments box when I click on a "Show comments" link. But I want to append the FB-Comments just once, and then just use the link to toggle that Div.</p>
  
  <p>I was trying something like this but it just appends it every time I click on the link, of course... </p>
  
  <p><a href="http://jsfiddle.net/4LnzD/" rel="nofollow">http://jsfiddle.net/4LnzD/</a></p>
  
  <p>Thanks!!</p>
  
  <p><strong>UPDATE:</strong> </p>
  
  <p><a href="http://jsfiddle.net/4LnzD/4/" rel="nofollow">http://jsfiddle.net/4LnzD/4/</a></p>
  
  <p>Now it's working great, but if someone knows a most efficient way to do it, you're welcome!</p>