title: Using JavaScript to increment top/left/bottom/right values
body: <p>I am trying to increment the position of an element by, say, <em>x</em> pixels. Here is what I've tried so far: </p>
  
  <pre><code>var top = document.getElementById("something").style.top;
  top = top + "300px"
  </code></pre>
  
  <p>I know that this is not going to work, but I was wondering if it was possible to increment a position value like this.</p>