title: how to display a popup window that focus on a particular division id?
body: <p>sample pages will be displayed "popup.html"</p>
  
  <pre><code>&lt;html&gt;
  &lt;div id="one"&gt; &lt;/ div&gt;
  &lt;div id="two"&gt; &lt;/ div&gt;
  &lt;div id="three"&gt; &lt;/ div&gt;
  &lt;div id="four"&gt; &lt;/ div&gt;
  &lt;/ html&gt;
  </code></pre>
  
  <p>Now I just want to display a popup that focus on div id = "three". What coding should I add to this script?</p>
  
  <pre><code>&lt;input type = "button" value = "New Window!" onClick = "window.open ('popup.html', 'popupwindow', 'width = 400, height = 200')"&gt;
  </code></pre>
  
  <p>Then how to disable the maximize function in the browser?</p>