title: Allow onclick just once
body: <p>In order to add a very long list of option elements to a select list I add them on-click. I want to prevent that the list is added multiple times. How can I do that? </p>
  
  <pre><code>$("#skiresort").click(function(){
  $("#skiresort").load("/v3/inc/review.php");
  });
  </code></pre>