diff --git a/django/contrib/admin/options.py b/django/contrib/admin/options.py
index 524ecf4938..9438233b4e 100644
--- a/django/contrib/admin/options.py
+++ b/django/contrib/admin/options.py
@@ -33,8 +33,9 @@ def unquote(s):
     return "".join(res)
 
 class AdminForm(object):
-    def __init__(self, form, fieldsets):
+    def __init__(self, form, fieldsets, prepopulated_fields):
         self.form, self.fieldsets = form, fieldsets
+        self.prepopulated_fields = [{'field': form[field_name], 'dependencies': [form[f] for f in dependencies]} for field_name, dependencies in prepopulated_fields.items()]
 
     def __iter__(self):
         for fieldset in self.fieldsets:
@@ -109,6 +110,7 @@ class ModelAdmin(object):
     js = None
     fields = None
     raw_id_fields = ()
+    prepopulated_fields = {}
 
     def __init__(self, model):
         self.model = model
@@ -145,9 +147,8 @@ class ModelAdmin(object):
         """
         from django.conf import settings
         js = ['js/core.js', 'js/admin/RelatedObjectLookups.js']
-        # TODO: This.
-        #if auto_populated_fields:
-            #js.append('js/urlify.js')
+        if self.prepopulated_fields:
+            js.append('js/urlify.js')
         if self.opts.has_field_type(models.DateTimeField) or self.opts.has_field_type(models.TimeField) or self.opts.has_field_type(models.DateField):
             js.extend(['js/calendar.js', 'js/admin/DateTimeShortcuts.js'])
         if self.opts.get_ordered_objects():
@@ -319,7 +320,7 @@ class ModelAdmin(object):
 
         c = template.RequestContext(request, {
             'title': _('Add %s') % opts.verbose_name,
-            'adminform': AdminForm(form, self.fieldsets_add(request)),
+            'adminform': AdminForm(form, self.fieldsets_add(request), self.prepopulated_fields),
             'oldform': oldforms.FormWrapper(model.AddManipulator(), {}, {}),
             'is_popup': request.REQUEST.has_key('_popup'),
             'show_delete': False,
@@ -410,7 +411,7 @@ class ModelAdmin(object):
 
         c = template.RequestContext(request, {
             'title': _('Change %s') % opts.verbose_name,
-            'adminform': AdminForm(form, self.fieldsets_change(request, object_id)),
+            'adminform': AdminForm(form, self.fieldsets_change(request, object_id), self.prepopulated_fields),
             'oldform': oldforms.FormWrapper(model.ChangeManipulator(object_id), {}, {}),
             'object_id': object_id,
             'original': obj,
diff --git a/django/contrib/admin/templates/admin/change_form.html b/django/contrib/admin/templates/admin/change_form.html
index 4889557abb..9c87bcf872 100644
--- a/django/contrib/admin/templates/admin/change_form.html
+++ b/django/contrib/admin/templates/admin/change_form.html
@@ -83,10 +83,20 @@
    <script type="text/javascript">document.getElementById("{{ adminform.first_field.auto_id }}").focus();</script>
 {% endif %}
 
-{% if auto_populated_fields %}
-   <script type="text/javascript">
-   {% auto_populated_field_script auto_populated_fields change %}
-   </script>
+{# JavaScript for prepopulated fields #}
+
+{% if add %}
+<script type="text/javascript">
+{% for field in adminform.prepopulated_fields %}
+    document.getElementById("{{ field.field.auto_id }}").onchange = function() { this._changed = true; };
+    {% for dependency in field.dependencies %}
+    document.getElementById("{{ dependency.auto_id }}").onkeyup = function() {
+        var e = document.getElementById("{{ field.field.auto_id }}");
+        if (!e._changed) { e.value = URLify({% for innerdep in field.dependencies %}document.getElementById("{{ innerdep.auto_id }}").value{% if not forloop.last %} + ' ' + {% endif %}{% endfor %}, {{ field.field.field.max_length }}); }
+    }
+    {% endfor %}
+{% endfor %}
+</script>
 {% endif %}
 
 </div>
diff --git a/django/contrib/admin/views/main.py b/django/contrib/admin/views/main.py
index b925693398..55b1b15f5c 100644
--- a/django/contrib/admin/views/main.py
+++ b/django/contrib/admin/views/main.py
@@ -109,7 +109,6 @@ class AdminBoundField(object):
 def render_change_form(model_admin, model, manipulator, context, add=False, change=False, form_url=''):
     opts = model._meta
     app_label = opts.app_label
-    auto_populated_fields = [f for f in opts.fields if f.prepopulate_from]
     original = getattr(manipulator, 'original_object', None)
     ordered_objects = opts.get_ordered_objects()
     inline_related_objects = opts.get_followed_related_objects(manipulator.follow)
@@ -120,7 +119,6 @@ def render_change_form(model_admin, model, manipulator, context, add=False, chan
         'has_change_permission': context['perms'][app_label][opts.get_change_permission()],
         'has_file_field': opts.has_field_type(models.FileField),
         'has_absolute_url': hasattr(model, 'get_absolute_url'),
-        'auto_populated_fields': auto_populated_fields,
         'ordered_objects': ordered_objects,
         'inline_related_objects': inline_related_objects,
         'form_url': form_url,
diff --git a/django/core/management.py b/django/core/management.py
index 885a1c10bc..74e8016fc8 100644
--- a/django/core/management.py
+++ b/django/core/management.py
@@ -891,8 +891,6 @@ def get_validation_errors(outfile, app=None):
                     from PIL import Image
                 except ImportError:
                     e.add(opts, '"%s": To use ImageFields, you need to install the Python Imaging Library. Get it at http://www.pythonware.com/products/pil/ .' % f.name)
-            if f.prepopulate_from is not None and type(f.prepopulate_from) not in (list, tuple):
-                e.add(opts, '"%s": prepopulate_from should be a list or tuple.' % f.name)
             if f.choices:
                 if not hasattr(f.choices, '__iter__'):
                     e.add(opts, '"%s": "choices" should be iterable (e.g., a tuple or list).' % f.name)
@@ -979,6 +977,14 @@ def get_validation_errors(outfile, app=None):
 
         # Check admin attribute.
         if opts.admin is not None:
+            # prepopulated_fields
+            if not isinstance(opts.admin.prepopulated_fields, dict):
+                e.add(opts, '"%s": prepopulated_fields should be a dictionary.' % f.name)
+            else:
+                for field_name, field_list in opts.admin.prepopulated_fields.items():
+                    if not isinstance(field_list, (list, tuple)):
+                        e.add(opts, '"%s": prepopulated_fields "%s" value should be a list or tuple.' % (f.name, field_name))
+
             # list_display
             if not isinstance(opts.admin.list_display, (list, tuple)):
                 e.add(opts, '"admin.list_display", if given, must be set to a list or tuple.')
diff --git a/django/db/models/fields/__init__.py b/django/db/models/fields/__init__.py
index 157eede01a..490ea91865 100644
--- a/django/db/models/fields/__init__.py
+++ b/django/db/models/fields/__init__.py
@@ -68,9 +68,8 @@ class Field(object):
     def __init__(self, verbose_name=None, name=None, primary_key=False,
         maxlength=None, unique=False, blank=False, null=False, db_index=False,
         core=False, rel=None, default=NOT_PROVIDED, editable=True,
-        prepopulate_from=None, unique_for_date=None, unique_for_month=None,
-        unique_for_year=None, validator_list=None, choices=None, radio_admin=None,
-        help_text='', db_column=None):
+        unique_for_date=None, unique_for_month=None, unique_for_year=None,
+        validator_list=None, choices=None, radio_admin=None, help_text='', db_column=None):
         self.name = name
         self.verbose_name = verbose_name
         self.primary_key = primary_key
@@ -79,7 +78,6 @@ class Field(object):
         self.core, self.rel, self.default = core, rel, default
         self.editable = editable
         self.validator_list = validator_list or []
-        self.prepopulate_from = prepopulate_from
         self.unique_for_date, self.unique_for_month = unique_for_date, unique_for_month
         self.unique_for_year = unique_for_year
         self._choices = choices or []