title: Changing variable after keypress?
body: <p>I'm trying to make a fun little game. </p>
  
  <p>You have to press all the keys on the screen as fast as you can, without getting it wrong.</p>
  
  <p>But struggling to change the variable after the first keypress. This is what I have:</p>
  
  <pre><code>&lt;script language="JavaScript"&gt;
      document.onkeydown = checkKeycode;
      var uyhgg=13;
      function checkKeycode(e) {
          var keycode;
          if (window.event) {
              keycode = window.event.keyCode;
          } else if (e) {
              keycode = e.which;
          }            
          if (keycode == uyhgg){
              document.write(keycode);
          } else {
              alert("you hit the wrong key");
          }
      }
  &lt;/script&gt;
  </code></pre>
  
  <p>Now after <code>document.write(keycode);</code> I want it to change the variable <code>uyhgg</code> (key code) to something else. 13 is enter. </p>