title: Call Javascript function only when checkbox is NOT checked
body: <p>I'm trying to figure out how to call a Javascript function only when a checkbox is NOT checked.</p>
  <p>Here is my checkbox:</p>
  <pre><code>&lt;input type=&quot;checkbox&quot; id=&quot;icd&quot; name=&quot;icd&quot; value=&quot;icd&quot; /&gt;
  </code></pre>
  <p>Here is the name of the function:</p>
  <pre><code>planhide();
  </code></pre>