--- a/ckanext/ga_report/public/scripts/ckanext_ga_reports.js
+++ b/ckanext/ga_report/public/scripts/ckanext_ga_reports.js
@@ -45,6 +45,7 @@
       graph: graph,
       legend: legend
     } );
+    myLegend.prepend('<div class="instructions">Click on a series below to isolate its graph:</div>');
     graph.render();
 };
 
@@ -54,24 +55,29 @@
    * Sparkline graphs should be drawn.
    * Note that they cannot be drawn sooner.
    */
+  var created = false;
   $('a[href="#totals"]').on(
     'shown', 
-    function() {
-      var sparkOptions = {
-        enableTagOptions: true,
-        type: 'line',
-        width: 100,
-        height: 26,
-        chartRangeMin: 0,
-        spotColor: '',
-        maxSpotColor: '',
-        minSpotColor: '',
-        highlightSpotColor: '000000',
-        lineColor: '3F8E6D',
-        fillColor: 'B7E66B'
-      };
-      $('.sparkline').sparkline('html',sparkOptions);
-    }
+      function() {
+        if (!created) {
+          var sparkOptions = {
+            enableTagOptions: true,
+            type: 'line',
+            width: 100,
+            height: 26,
+            chartRangeMin: 0,
+            spotColor: '',
+            maxSpotColor: '',
+            minSpotColor: '',
+            highlightSpotColor: '#000000',
+            lineColor: '#3F8E6D',
+            fillColor: '#B7E66B'
+          };
+          $('.sparkline').sparkline('html',sparkOptions);
+          created = true;
+        }
+        $.sparkline_display_visible();
+      }
   );
 };
 
@@ -81,7 +87,7 @@
    * Show the correct rickshaw graph in the sidebar. 
    * Not to be called before all graphs load.
    */
-  $('a[data-toggle="hashchange"]').on(
+  $('a[data-toggle="hashtab"]').on(
     'shown',
     function(e) {
       var href = $(e.target).attr('href');
@@ -94,39 +100,23 @@
       }
       legend_name = '#legend_'+legend_name;
       $('#graph-legend-container > *').hide();
+      $('#graph-legend-container .instructions').show();
       $(legend_name).show();
     }
   );
+  /* The first tab might already have been shown */
+  $('li.active > a[data-toggle="hashtab"]').trigger('shown');
 };
 
 CKAN.GA_Reports.bind_month_selector = function() {
   var handler = function(e) { 
     var target = $(e.delegateTarget);
     var form = target.closest('form');
-    form.attr('action', form.attr('action')+window.location.hash);
-    form.submit();
+    var url = form.attr('action')+'?month='+target.val()+window.location.hash;
+    window.location = url;
   };
   var selectors = $('select[name="month"]');
   assert(selectors.length>0);
   selectors.bind('change', handler);
 };
 
-/* 
- * Custom bootstrap plugin for handling data-toggle="hashchange".
- * Behaves like data-toggle="tab" but I respond to the hashchange.
- * Page state is memo-ized in the URL this way. Why doesn't Bootstrap do this?
- */
-$(function() {
-  var mapping = {};
-  $('a[data-toggle="hashchange"]').each(
-    function(i,link) {
-      link = $(link);
-      mapping[link.attr('href')] = link;
-    }
-  );
-  $(window).hashchange(function() {
-    var link = mapping[window.location.hash];
-    if (link) { link.tab('show'); }
-  });
-});
-