I've built a slideshow with images (with anchors) as the nav. And now i'm trying to 
add a caption to the main image. But it's not pulling in the text. The images
and the nav are cycling quite prettily, but the <div id="caption"></div> isn't 
being filled with the alt text of the image.

$(document).ready (function (){
 $('#slideshow').cycle({
 after: addCaption,
 fx: 'fade',
 speed: 'fast',
 timeout: 3000,
 pager: '#nav',
 pagerEvent:'mouseover',
 pagerAnchorBuilder: function(idx, slide) { 
 // return selector string for existing anchor 
 return '#nav li:eq(' + idx + ') a'; }
 });
 function addCaption() {
 var title = $(this).attr('alt');
 $('#caption').html(title);
 }
});