diff --git a/app/assets/javascripts/samples/sample_datatable.js.erb b/app/assets/javascripts/samples/sample_datatable.js.erb
index fec699502..bdd205888 100644
--- a/app/assets/javascripts/samples/sample_datatable.js.erb
+++ b/app/assets/javascripts/samples/sample_datatable.js.erb
@@ -780,6 +780,9 @@ function createSampleTypeSelect(data, selected) {
   $.each(data, function(i, val) {
     var $option = $('<option></option>')
       .attr('value', val.id).text(val.name);
+    if((i + 1) === selected) {
+      $option.attr('selected', true);
+    }
     $selectType.append($option);
   });
   return $selectType;
@@ -806,7 +809,9 @@ function createSampleGroupSelect(data, selected) {
     var $option = $('<option></option>')
       .attr('value', val.id).text(val.name)
       .attr('data-content', $span.prop('outerHTML') + ' ' + val.name);
-
+    if((i + 1) === selected) {
+      $option.attr('selected', true);
+    }
     $selectGroup.append($option);
   });
   return $selectGroup;
diff --git a/app/assets/javascripts/sitewide/utils.js b/app/assets/javascripts/sitewide/utils.js
index f42f515c2..50224bb57 100644
--- a/app/assets/javascripts/sitewide/utils.js
+++ b/app/assets/javascripts/sitewide/utils.js
@@ -215,3 +215,32 @@ function initPageTutorialSteps(pageFirstStepN, pageLastStepN, nextPagePath,
     });
   }
 }
+
+/**
+ * Add redirection links on dropdown elements. You must specify 'href'
+ * attribute yourself, and the dropdown elments which don't have them, will get
+ * '#' by default.
+ * @param  {number} selectedIdx Index of element to be selected
+ * @param  {string} urlParam    URL parameter to pass to the link URLs
+ * @return {Object}             This
+ */
+$.fn.makeDropdownOptionsLinks = function(selectedIdx, urlParam) {
+  selectedIdx = _.isUndefined(selectedIdx) ? 1 : selectedIdx;
+
+  $(this).change(function() {
+    window.location.href = addParam($(this).find('option:selected')
+                                      .attr('href'), urlParam);
+  });
+
+  $(this).find('option')
+    .each(function() {
+      if ($(this).is('[href]')) {
+        $(this).addClass('link-look');
+      } else {
+        $(this).attr('href', '#');
+      }
+    })
+    .eq(selectedIdx).attr('selected', true);
+
+  return this;
+};