function looks well-formed, but not working

function looks well-formed, but not working

Hi folks:


this function, from the head of the page,
   
  1. $(document).ready(function(){
  2. $('.hex').hover(function(){
  3. $(this).find('.hN').show();
  4. });
  5. $('.hex2').hover(function(){
  6. $(this).find('.hN').show();
  7. });
  8. });
should, when any one of the 64 figures in hovered over, make a number appear under that figure.
When you hover, the cursor becomes a pointer, so something's happening: but no number appears.
The 64 figures you can see are css ".hex"; there's another layer you can't currently see, which are css '.hex2', which the second part of the function refers to.