jquery de-bugging - tooltip

jquery de-bugging - tooltip

Hi

i'm trying to use the tooltip plug-in on this page

http://www.ecolo-sport.com/imprimeur-ec ... p?cat_id=2

but it fails - and so totally silently that I don't knwo where the problem is coming from.

Firefox tells me that there are no js errors, I have the most recent version of jquery etc and the js files are all reachable at the url provided

the function I'm using is this :
<script type="text/javascript">
         
         $(function() {
            $('td-image img').tooltip({
               track: true,
               delay: 0,
               showURL: false,
               fade: 250,
               bodyHandler: function() {
                  return $("<img/>").attr("src", this.src);
               }      
            });
         });

</script>


and this is on the images on each row of the table

<td class="td-image"><img src="http://www.ecolosport.com/dyn/A4-2volets.jpg" class="img-vert" alt=""></td>


is there something obvious I haven't seen ?

is there a tool that would help me to de-bug my jquery function ?

thanks for any help you can give