reset form()

reset form()

hi ! i have captcha form in my form . when send data with submit change captcha auto and reset form . ( with out jquery ) now : with jquery send data worked but not reset form after send data . how to reset form with jquery or reset any field ( captcha field ) after submit ?

$(document).ready(function() {

   $().ajaxStart(function() {
      $('#loading').show();
      $('#result').hide();
   }).ajaxStop(function() {
      $('#loading').hide();
      $('#result').fadeIn('slow');
   });

   $('#myForm').submit(function() {
      $.ajax({
         type: 'POST',
         url: $(this).attr('action'),
         data: $(this).serialize(),
         success: function(data) {
            $('#result').html(data);
         }
      })
      return false;
   });
})