title: jquery trigger change event on checkbox
body: <p>Is it possible to trigger change event on a checkbox using javascript/jquery?</p>
  
  <p>Something like this (I run triggerChange on click of a button):</p>
  
  <pre><code>&lt;label&gt;&lt;input type="checkbox" id="chk"/&gt;Label for chk&lt;/label&gt;
  
  &lt;script&gt;
  function triggerChange(){
      $("#chk").trigger("change");
  }
  &lt;/script&gt;
  </code></pre>
  
  <p>When I run the above code I get this error: "<strong>trigger is not a function</strong>".</p>