title: IE11 CSS alternative to "unset"
body: <p>I have a fixed div on my page which is positioned with the following CSS properties:</p>
  
  <pre><code>width: 320px;
  height: 160px;
  position: fixed;
  right: 15px;
  bottom: 15px;
  top: unset;
  z-index: -1;
  </code></pre>
  
  <p>The div appears fine in the bottom right of the page in other browsers, but in Internet Explorer 11 the div appears in the top right. I believe this issue is coming from <code>top: unset;</code> which doesnt appear to be supported in IE.</p>
  
  <p>Are there any workarounds using CSS or JS that could be used to achieve the same positioning?</p>