$.ajax({
 cache: false,
 type: "POST",
 url: {% url ''%}
 data: $('#form').serialize(),
 async: true,
 success: function (data) {
  if (data.status == 'success') {
   $('#form')[0].reset();
   alert("提交成功")
  } else if (data.status == 'fail') {
   $('#tip').html(data.msg)
  }
 },
});

if form.is_valid():
 
return HttpResponse("{'status':'success'}", content_type='application/json')

if form.is_valid():
 return HttpResponse('{"status":"success"}', content_type='application/json')