title: Open a popup by clicking on a button
body: <p>I have a link that opens a small popup (not a new tab) to a page. 
  I would like to integrate this function into a button. Unfortunately this doesn't work as hoped.</p>
  
  <p>Good example link: <br></p>
  
  <pre><code>&lt;a href='#' onclick='window.open **
  ("https://google.com","mywindow", 
  "menubar=1,resizable=1,width=500,height=500")'&gt;
  Link&lt;/a&gt;
  </code></pre>
  
  <p>Current button that should do the same:</p>
  
  <pre><code>&lt;form&gt;
    &lt;input class="btnstylega" onclick="window.location.href='https://google.com'" type="button" value="Link" /&gt;
  &lt;/form&gt;
  </code></pre>