title: Stop window scroll with keycode (arrows), event.preventDefault() not working?
body: <p>I built an autosuggest, and keycode works to navigate up and down through the list, but it scrolls the window. I have tried event.preventDefault() but it is not stopping it. Any ideas? This is what I have tried:</p>
  
  <pre><code>$(document).keyup(function(e) {
  e.returnValue=false;
  e.preventDefault();
  switch(e.keyCode) {
      case 40:
          suggestionLine++;
                  $('#suggestionLine_'+suggestionLine).focus();
                  break;
  // etc...
  </code></pre>
  
  <p>Thank you!</p>