title: Javascript when holding down arrow keys?
body: <p>I have this script to trigger some javascript. But the script does not support holding down the arrow keys. How can I make this work when I hold the arrow keys.</p>
  <pre><code>document.onkeyup = KeyCheck;       
  function KeyCheck()
  {
      var KeyID = event.keyCode;
  
      switch(KeyID)
      {
        case 37:
        right('img'); document.getElementById('img').src = 'guyl.png';
        break;
        
        case 38:
        up('img');
        break
  
        case 39:
        left('img'); document.getElementById('img').src = 'guyr.png';
        break;
  
        case 40:
        down('img');
        break;   
       }
  }
  </code></pre>