title: toggle disabled attribute in jquery
body: <p>I've a checkbox that enable or disable a select element</p>
  
  <p>Actually I use this simple piece of code that works fine.</p>
  
  <pre><code>$("#filtri").change(function(){
      if ($("#menuContinenti").attr("disabled")) {
          $("#menuContinenti").removeAttr("disabled");
      } else {
          $("#menuContinenti").attr("disabled", "disabled");
      }
  });
  </code></pre>
  
  <p>Is this the best way or is there something like a <code>.toggle()</code> function to switch between disabled/enabled?</p>