simple VLT messages - code in coffeescript: sending messages to server and receive responses, both in JSON

master.js.coffee

$(document).ready ->
   tester = $('nav#tester')
   if tester.length > 0
      tester.find('a').click (event) ->
         $('<div/>',{'class': 'query', html: JSON.stringify($(this).data('json'))}).appendTo('div#tester_commands')
         $('div#tester_commands').scrollTop(1000)
         $.ajax
            dataType: 'json',
            url: $(this).attr('href'),
            type: $(this).attr('data-method').toUpperCase(),
            data: $(this).data('json'),
            success: (data, textStatus, jqXHR) ->
               if data.id
                  $('nav#tester > ul > li > a').each ->
                     $(this).attr('href', $(this).attr('href').replace('0', data.id.toString()) )
                     $(this).data('json').id = data.id.toString() if $(this).data('json').id == 0
                     $(this).parent().css('visibility', 'visible')

               $('<div/>',{'class': 'response', html: JSON.stringify(data)}).appendTo('div#tester_commands')
               $('div#tester_commands').scrollTop(1000)
         false