title: keycode 13 is for which key
body: <p>Which is the key on the keyboard having the keycode as <code>13</code>?</p>
  
  <pre><code>switch(key) {
    case 37: 
      $.keynav.goLeft();
      break;
    case 38: 
      $.keynav.goUp();
      break;
    case 39: 
      $.keynav.goRight();
      break;
    case 40: 
      $.keynav.goDown();
      break;
    case 13: 
      $.keynav.activate();
      break;
  }
  </code></pre>