title: HTML/CSS make div snap to the windows's bottom
body: <p>I've this div: </p>
  
  <pre><code>&lt;style&gt;
  #asd{
      height:auto;
  width:1024px;
  margin-left:auto;
  margin-right:auto;
  background-color:#093;
  }
  
  &lt;/style&gt;
  </code></pre>
  
  <p>I want this div's bottom to always reach down to the window's bottom, whatever the window's current size is.</p>
  
  <p>what I tried so far adding to #asd's css, without the expected results:
  margin-bottom:0px;
  or
  height:100%;
  or
  bottom:0px;</p>
  
  <p>any advice?</p>