如何使用ajax处理render_to_response，以便可以使用内容重定向页面？

views.py

def usersignup(request):
        content = {}
        userinfo = user_signup.objects.all()
        if request.method == "POST":
            fullname = request.POST.get('fullname')
            email = request.POST.get('email')
            password = request.POST.get('password')
            for i in userinfo:
                if i.user_email == email:
                    # content['err_msg'] = 'Email Id already exists'
                    return HttpResponse('Already Exist')
                    # return render_to_response("index.html",content,context_instance=RequestContext(request))
            userobj = user_signup.objects.create(full_name=fullname, user_email=email, user_password=password)
            content['fullname'] = fullname
            content['useremail'] = email
            request.session['user'] = userobj.user_email
        return render_to_response("users/user_signup.html",content,context_instance=RequestContext(request))
def usersignup(request):