gistfile1.js

      $('#bidding .editable').editable('/loads/<%=@load.id%>/manifest_entries/edit_in_place.ajax', {
        'id': 'elementid',
        'name': 'elementname',
        'callback': function(result,settings){
          var field = $(this).attr('class').split(/ /).pop();
          if(field.match(/_cents$/)){
            $(this).html(result.manifest_entry.manifest_entry[field]/100).formatCurrency();
          } else {
            $(this).html(result.manifest_entry.manifest_entry[field]);
          }
          eval(result.sums_for);
          update_manifest_values()
        },
        'ajaxoptions': {dataType: 'json'},
        'submitdata': function(value,settings){
          var id = $(this).parent('tr').attr('id').split(/-/)[1];
          var field = $(this).attr('class').split(/ /).pop();
          field = field.replace(/_cents$/,'');
          var data = {'id': id,'attr':field};
          data[field] = $(this).find('input').val();
          return data;
        }

using http://www.appelsiini.net/projects/jeditable