title: javascript onmousemove get relative coordinates
body: <pre><code>function aim() {
      var mousex = ?
  }
  
  &lt;div class="gameArea" onmousemove="aim();"&gt; &lt;/div&gt;
  </code></pre>
  
  <p>I can't find how to get the mouse coordinates for an onmousemove event in javascript.</p>