n></li>
    <ul>
      <li>Allows script writer to inform user</li>
      <ul>
	<li>messages and progress</li>
      </ul>
      <li>Allows user to cancel script</li>
      <li>Always use inside loops</li>
    </ul>
  </ul>
</ul>
<br>
<table style="width:80%; float:inherit; border-spacing:10px;" border="1">
  <tr style="padding: 8px">
    <td style="padding: 8px">
      <span style="font-size:12px; color:#1E90FF;">
      <pre>
while (!monitor.isCancelled()) {
  ...
}
      </pre>
      </span>
  </td>
  <td