Jquery 验证 - 从服务器端 Django 检查电子邮件和用户名的可用性

I'm trying to validate the registration form for email and username availability from server-side programmed with Django. I checked this one jQuery Validation Plugin remote check for password with Django but I'm getting 403 forbidden - CSRF verification failed. I tried including csrf token inside the jquery script. But still not working. I've shown the code below for checking email availability.

views.py:

def email_check(request):
    response_str="false"
    if request.is_ajax():
        e = request.POST.get("email_address")
        try:
            obj = User.objects.get(email=e)
        except DoesNotExist:
            response_str="true"
    return HttpResponse(response_str)

urls.py:

url(r'^signup/email/check/$', 'registration.views.email_check')

注册.html:https://gist.github.com/2253002

有人可以帮我解决这个问题吗?