diff --git a/dav_events/choices.py b/dav_events/choices.py
index 6388955..32b23de 100644
--- a/dav_events/choices.py
+++ b/dav_events/choices.py
@@ -31,6 +31,10 @@ class ChoiceSet(object):
         else:
             return False
 
+    @property
+    def codes(self):
+        return self._codes
+
     def get_label(self, code):
         return self._labels[code]
 
diff --git a/dav_registration/templates/dav_registration/event_list.html b/dav_registration/templates/dav_registration/event_list.html
index 216e170..6b11534 100644
--- a/dav_registration/templates/dav_registration/event_list.html
+++ b/dav_registration/templates/dav_registration/event_list.html
@@ -18,16 +18,13 @@
     <table id="objects_table" class="table table-bordered table-hover">
         <thead>
             <tr>
-                <th class="hidden">Sport</th>
-                <th class="hidden">Level</th>
                 <th><input type="text" id="searchfield" placeholder="{% trans 'Volltextsuche' %}"></th>
+                <th class="hidden">Attributes</th>
             </tr>
         </thead>
         <tbody>
             {% for event in event_list %}
             <tr>
-                <td class="hidden">{{ event.sport }}</td>
-                <td class="hidden">{{ event.level }}</td>
                 <td>
                     <div class="pull-right" style="margin-left: 2em;">
                         <a role="button" id="controlChevronCollapseDetails{{ event.id }}" data-toggle="collapse"
@@ -122,42 +119,55 @@
                         });
                     </script>
                 </td>
+                <td class="hidden">{{ event.sport }},{{ event.level }},</td>
             </tr>
             {% endfor %}
         </tbody>
     </table>
     <script type="text/javascript">
-        function filter_table(table, sport, level) {
+        function filter_table(table, filter) {
             const sport_choices = ["B", "K", "M", "S", "W"];
             const level_choices = ["beginner", "advanced", "family"];
+            var choices = sport_choices.concat(level_choices);
+            var filter_cleaned = [];
+            var filter_expr;
 
-            if(sport != "*")
-                $("#btn-filter-" + sport).removeClass("btn-white");
-            if(level != "*")
-                $("#btn-filter-" + level).removeClass("btn-white");
-
-            if(sport == "*" && level == "*")
-                $("#btn-filter-All").removeClass("btn-white");
-            else
+            if(filter.length > 0) {
                 $("#btn-filter-All").addClass("btn-white");
-
-            for(let i in sport_choices) {
-                if(sport != sport_choices[i])
-                    $("#btn-filter-" + sport_choices[i]).addClass("btn-white");
-            }
-            for(let i in level_choices) {
-                if(level != level_choices[i])
-                    $("#btn-filter-" + level_choices[i]).addClass("btn-white");
+            } else {
+                $("#btn-filter-All").removeClass("btn-white");
             }
 
-            if(sport == "*")
-                sport = ""
-            table.column(0).search(sport).draw();
+            for(let i in choices) {
+                if(filter.indexOf(choices[i]) >= 0) {
+                    filter_cleaned.push(choices[i]);
+                    $("#btn-filter-" + choices[i]).removeClass("btn-white");
+                } else {
+                    $("#btn-filter-" + choices[i]).addClass("btn-white");
+                }
+            }
 
-            if(level == "*")
-                level = ""
-            table.column(1).search(level).draw();
-        };
+            if(filter_cleaned.length > 0) {
+                filter_expr = "(" + filter_cleaned.join("|") + "),";
+            } else {
+                filter_expr = "";
+            }
+
+            table.column(1).search(filter_expr, true, false);
+            table.draw();
+        }
+        function toggle_filter(table, filter, attribute) {
+            let i = filter.indexOf(attribute);
+            if(i >= 0)
+                filter.splice(i, 1);
+            else
+                filter.push(attribute);
+            filter_table(table, filter);
+        }
+        function reset_filter(table, filter) {
+            filter.splice(0, filter.length);
+            filter_table(table, filter);
+        }
         $(document).ready( function () {
             var table = $("#objects_table").DataTable( {
                 ordering: false,
@@ -172,32 +182,33 @@
                     zeroRecords: "{% trans 'Keine passenden Einträge.' %}",
                 }
             } );
+            var filter = ['{{ init_filter|join:"','" }}'];
             $("#btn-filter-All").on("click", function() {
-                filter_table(table, "*", "*");
+                reset_filter(table, filter);
             } );
             $("#btn-filter-B").on("click", function() {
-                filter_table(table, "B", "*")
+                toggle_filter(table, filter, "B");
             } );
             $("#btn-filter-K").on("click", function() {
-                filter_table(table, "K", "*")
+                toggle_filter(table, filter, "K");
             } );
             $("#btn-filter-M").on("click", function() {
-                filter_table(table, "M", "*")
+                toggle_filter(table, filter, "M");
             } );
             $("#btn-filter-S").on("click", function() {
-                filter_table(table, "S", "*")
+                toggle_filter(table, filter, "S");
             } );
             $("#btn-filter-W").on("click", function() {
-                filter_table(table, "W", "*")
+                toggle_filter(table, filter, "W");
             } );
             $("#btn-filter-family").on("click", function() {
-                filter_table(table, "*", "family")
+                toggle_filter(table, filter, "family");
             } );
             $("#searchfield").on( "keyup change", function() {
-                table.column(2).search( this.value ).draw();
+                table.column(0).search( this.value ).draw();
             } );
             $("#objects_table_filter").hide();
-            filter_table(table, "{{ init_sport_filter|default:'*' }}", "{{ init_level_filter|default:'*' }}");
+            filter_table(table, filter);
         } );
     </script>
 </div>
diff --git a/dav_registration/views.py b/dav_registration/views.py
index f2b39d0..0f3d1ac 100644
--- a/dav_registration/views.py
+++ b/dav_registration/views.py
@@ -51,21 +51,16 @@ class EventListView(generic.ListView):
 
     def get_context_data(self, **kwargs):
         context = super().get_context_data(**kwargs)
-        if hasattr(self, 'init_sport_filter'):
-            context['init_sport_filter'] = self.init_sport_filter
-        if hasattr(self, 'init_level_filter'):
-            context['init_level_filter'] = self.init_level_filter
+        if hasattr(self, 'init_filter'):
+            context['init_filter'] = self.init_filter
         return context
 
     def get(self, request, *args, **kwargs):
-        if 'sport' in request.GET:
-            sport = request.GET['sport']
-            if (sport, 'Bogus') in SPORT_CHOICES:
-                self.init_sport_filter = sport
-        if 'level' in request.GET:
-            level = request.GET['level']
-            if (level, 'Bogus') in LEVEL_CHOICES:
-                self.init_level_filter = level
+        if 'filter' in request.GET:
+            choices = SPORT_CHOICES.codes + LEVEL_CHOICES.codes
+            filter_input = request.GET['filter'].split(',')
+            filter_cleaned = list(set(filter_input) & set(choices))
+            self.init_filter = filter_cleaned
         return super().get(request, *args, **kwargs)