diff --git a/django/didgeridoo/currencies/urls.py b/django/didgeridoo/currencies/urls.py
index 28801cf..ef9dd3f 100644
--- a/django/didgeridoo/currencies/urls.py
+++ b/django/didgeridoo/currencies/urls.py
@@ -4,4 +4,7 @@ from currencies.views import currencies, CurrencyUpdate
 
 urlpatterns = [
     url(r'^currencies/$', currencies),
+    url(r'^ajax/CurrencyUpdate/$',
+        CurrencyUpdate,
+        name='CurrencyUpdate'),
 ]
diff --git a/django/didgeridoo/currencies/views.py b/django/didgeridoo/currencies/views.py
index 5af1837..a69fb90 100644
--- a/django/didgeridoo/currencies/views.py
+++ b/django/didgeridoo/currencies/views.py
@@ -7,17 +7,18 @@ from currencies.models import (ExchangeRate,
                                ExchangeRate_name)
 from currencies import exchange_rates
 from currencies.forms import CurrencyForm
+from django.http import JsonResponse
 
 
 def CurrencyUpdate(request):
-    if request.method == 'POST':
-        currency_form = CurrencyForm
-        assert False
-    else:
-        currency_form = CurrencyForm
-        assert False
-    return render(request,
-                  {'currency_form': currency_form})
+    assert False
+    currency = request.GET.get('CurrencyUpdate', None)
+    data = {
+        'currency': ExchangeRate_name.objects.filter(
+                    name=currency)
+    }
+    return JsonResponse(data)
+
 
 def currencies(request):
     # this function fetches the data from exchange_rates.py
diff --git a/django/didgeridoo/static/js/app.js b/django/didgeridoo/static/js/app.js
new file mode 100644
index 0000000..09c128c
--- /dev/null
+++ b/django/didgeridoo/static/js/app.js
@@ -0,0 +1,15 @@
+  $("#id_currency").change(function () {
+    var currency = $(this).val();
+    $.ajax({
+      url: '/ajax/CurrencyUpdate/',
+      data: {
+        'currency': currency
+      },
+      dataType: 'json',
+      success: function (data) {
+        if (data.is_taken) {
+          alert("es pop auf! --dies kommt von: static/js/app.js--.");
+        }
+      }
+    });
+  });
diff --git a/django/didgeridoo/webshop/urls.py b/django/didgeridoo/webshop/urls.py
index dc79c1d..5a4685e 100644
--- a/django/didgeridoo/webshop/urls.py
+++ b/django/didgeridoo/webshop/urls.py
@@ -11,6 +11,10 @@ urlpatterns = [
         views.articles_in_category,
         name='category'),
     url('^', include('django.contrib.auth.urls')),
-    url(r'^profile/$', views.profile, name='profile'),
-    url(r'^registration/$', views.registration, name='registration'),
+    url(r'^profile/$',
+        views.profile,
+        name='profile'),
+    url(r'^registration/$',
+        views.registration,
+        name='registration'),
 ]
diff --git a/django/didgeridoo/webshop/views.py b/django/didgeridoo/webshop/views.py
index 1a4a4db..040f522 100644
--- a/django/didgeridoo/webshop/views.py
+++ b/django/didgeridoo/webshop/views.py
@@ -11,6 +11,7 @@ from webshop.models import (Article,
                             Picture)
 from webshop.forms import RegistrationForm
 
+
 # Create your views here.