Roundabout jQuery plugin keypress arrow keys move left right - jquery-plugins

Question

I'm using the Roundabout plugin ( http://fredhq.com/projects/roundabout ) but can't work out how to use the preset callable methods, like animate to next / previous on keypress with the left/right arrow keys.
I can get keypress to work in general without using these presets but I really want to use the preset classes on various keypress's. Any ideas?
The HTML
<div id="carousel-container">
<ul class="roundabout-holder">
<li class="roundabout-moveable-item roundabout-in-focus"></li>
<li class="roundabout-moveable-item"></li>
<li class="roundabout-moveable-item"></li>
<li class="roundabout-moveable-item"></li>
<li class="roundabout-moveable-item"></li>
</ul>
</div>
jQuery set up
<script> // Calling the Roundabout plugin
$(document).ready(function() {
$('ul').roundabout();
});
</script>
$(document.documentElement).keyup(function (event) {
var direction = null;
// handle cursor keys
if (event.keyCode == 37) {
// go left
$('#roundabout-container').roundabout("animateToNextChild");
} else if (event.keyCode == 39) {
// go right
$('#roundabout-container').roundabout("animateToPreviousChild");
}
if (direction != null) {
$('ul.roundabout-holder li.roundabout-moveable-item').parent()[direction]().find('a').click();
}
});

Answer 1

this works for me
The HTML
<ul class="pasador">
<li><img src="fichas/01.jpg" alt="Award" /></li>
<li><img src="fichas/02.jpg" alt="Backpack" /></li>
etc ...
</ul>
JQUERY SET UP
<script>
$(document).ready(function() {
$('ul.pasador').roundabout();
});
</script>
$(document.documentElement).keyup(function(event) {
if (event.keyCode == 37) {
$('ul.pasador').roundabout("animateToPreviousChild");
} else if (event.keyCode == 39) {
$('ul.pasador').roundabout("animateToNextChild");
}
});