diff --git a/admin_menu_toolbar/admin_menu_toolbar.css b/admin_menu_toolbar/admin_menu_toolbar.css
index b6d6b25..d40d28c 100644
--- a/admin_menu_toolbar/admin_menu_toolbar.css
+++ b/admin_menu_toolbar/admin_menu_toolbar.css
@@ -20,6 +20,8 @@ body div#toolbar {
 
 #admin-menu {
   font: normal 0.9em "Lucida Grande", Verdana, sans-serif;
+}
+.admin-menu-shadow {
   box-shadow: 0 3px 20px #000;
   -moz-box-shadow: 0 3px 20px #000;
   -webkit-box-shadow: 0 3px 20px #000;
diff --git a/admin_menu_toolbar/admin_menu_toolbar.install b/admin_menu_toolbar/admin_menu_toolbar.install
index 232e5a5..974f7ff 100644
--- a/admin_menu_toolbar/admin_menu_toolbar.install
+++ b/admin_menu_toolbar/admin_menu_toolbar.install
@@ -19,6 +19,14 @@ function admin_menu_toolbar_install() {
 }
 
 /**
+ * Implements hook_uninstall().
+ */
+function admin_menu_toolbar_uninstall() {
+  // Delete variables.
+  variable_del('admin_menu_toolbar_drop_shadow');
+}
+
+/**
  * Set module weight to a value higher than admin_menu.
  *
  * At this point, admin_menu should have a weight of 100. To account for
diff --git a/admin_menu_toolbar/admin_menu_toolbar.js b/admin_menu_toolbar/admin_menu_toolbar.js
index 33710a1..b38236b 100644
--- a/admin_menu_toolbar/admin_menu_toolbar.js
+++ b/admin_menu_toolbar/admin_menu_toolbar.js
@@ -21,6 +21,16 @@ Drupal.admin.behaviors.toolbarActiveTrail = function (context, settings, $adminM
 };
 
 /**
+ * Apply drop shadow to the administration menu.
+ */
+Drupal.admin.behaviors.toolbarDropShadow = function (context, settings, $adminMenu) {
+  if (settings.admin_menu.toolbar && settings.admin_menu.toolbar.dropShadow) {
+    console.log(settings.admin_menu.toolbar);
+    $('#admin-menu', context).addClass('admin-menu-shadow');
+  }
+};
+
+/**
  * @} End of "defgroup admin_behaviors".
  */
 
diff --git a/admin_menu_toolbar/admin_menu_toolbar.module b/admin_menu_toolbar/admin_menu_toolbar.module
index 7839b1a..df48108 100644
--- a/admin_menu_toolbar/admin_menu_toolbar.module
+++ b/admin_menu_toolbar/admin_menu_toolbar.module
@@ -36,6 +36,11 @@ function admin_menu_toolbar_init() {
   elseif (drupal_is_front_page()) {
     $settings['activeTrail'] = url('<front>');
   }
+  
+  if ($setting = variable_get('admin_menu_toolbar_drop_shadow', 1)) {
+    $settings['dropShadow'] = $setting;
+  }
+  
   drupal_add_js(array('admin_menu' => array('toolbar' => $settings)), 'setting');
 }
 
@@ -83,3 +88,14 @@ function admin_menu_toolbar_admin_menu_output_alter(&$content) {
   );
 }
 
+/**
+ * Implements hook_form_FORMID_alter().
+ */
+function admin_menu_toolbar_form_admin_menu_theme_settings_alter(&$form, &$form_state) {
+  $form['admin_menu_toolbar_drop_shadow'] = array(
+    '#type' => 'checkbox',
+    '#title' => t('Enable the drop shadow'),
+    '#default_value' => variable_get('admin_menu_toolbar_drop_shadow', 1),
+    '#description' => t('Toggles the drop shadow under the administration menu.'),
+  );
+}
\ No newline at end of file