Using .keydown with the .cycle plugin

Using .keydown with the .cycle plugin

Is this possible?
I've tried using:
  1. $(document).ready(function() {
      $('#slideshow').cycle({
        fx:     'fade',
        speed:  1000,
        timeout: 0,
        next:   '.next',
        prev:   '.prev',
        after: onAfter,
        pager:  '#nav',
          pagerAnchorBuilder: function(idx, slide) {
            return '#nav li:eq(' + (idx) + ') a';
          }

      });













And than:
  1.  function onAfter(curr,next,opts) {
  2.     var currentis = opts.currSlide + 1;
  3.     var previs = opts.currSlide - 1;
  4.     var nextis = opts.currSlide + 1;
  5.       $(document).keydown(function(e){
            switch(e.keyCode){

              case 37:
              if (currentis != '1') {
              $('#nav li:eq('+previs+') a').triggerHandler('click');
              } else {
              $('');
              };
              break;

              case 39:
              if (currentis != totalcount) {
              $('#nav li:eq('+nextis+') a').triggerHandler('click');
              };
              break;
              }
          });

















than in the html:
  1.     <ul id="nav">
            <li><a href="#"><img src="http://cloud.github.com/downloads/malsup/cycle/beach1.jpg" width="50" height="50" /></a></li>
            <li><a href="#"><img src="http://cloud.github.com/downloads/malsup/cycle/beach2.jpg" width="50" height="50" /></a></li>
            <li><a href="#"><img src="http://cloud.github.com/downloads/malsup/cycle/beach3.jpg" width="50" height="50" /></a></li>
        </ul>

    <div style="padding:20px">
      <div id="slideshow">
        <img src="http://cloud.github.com/downloads/malsup/cycle/beach1.jpg" width="200" height="200" alt="asd" />
        <img src="http://cloud.github.com/downloads/malsup/cycle/beach2.jpg" width="400" height="200" alt="asd2" />
        <img src="http://cloud.github.com/downloads/malsup/cycle/beach3.jpg" width="200" height="200" alt="asd3" />
      </div>

It changes the slide, but with no effect or while jumping to another slide and only doing the transition to the target slide.

Thanks!