title: how to programmatically set or reset checkbox
body: <p>Purpose: when a particular checkbox is checked or unchecked, the program must change a number of other checkboxes according to programmed rules.  </p>
  
  <pre><code>&lt;input type="checkbox" id="chkbox" (change)="onChangeChk($event)"&gt;Test Checkbox
  
    onChangeChk($event) {
      $event.srcElement.value = "on"; // or "off"
    }
  </code></pre>
  
  <p>The checkbox remains in its original state no matter how the onChangeChk sets it.</p>
  
  <p>Thanks for you help on this.
  :-)</p>