Character count magento

I need the javascript below added to magento admin product entry page and testing for character counts.. <script type="text/javascript"> [login to view URL](window, "load", function(){ $$('input[type="text"], textarea').each( function(i) { var my_id = $(i).readAttribute('id'); $(i).insert({ 'after': "<div id='"+my_id+"_counter'>Char count: <span id='" +my_id +"_counter_num'>"+$(i).getValue().length+"</span></div>" }); $(i).observe('keyup', function(e) { $(my_id+"_counter_num").update($(this).getValue().length); }); }); }); </script> a few minutes work but the right candidate will benefit from ongoing assignments related to this site.