diff --git a/site/layouts/partials/nav.html b/site/layouts/partials/nav.html
index 298dd88..82c334a 100644
--- a/site/layouts/partials/nav.html
+++ b/site/layouts/partials/nav.html
@@ -1,5 +1,6 @@
 {{ "<!-- NAVIGATION -->" | safeHTML }}
 <nav id="mainNav" class="navbar navbar-default navbar-fixed-top affix">
+    <noscript><b>Warning:</b> Interactive features will not work with JavaScript disabled</noscript>
     <div class="container-fluid">
         {{ "<!-- Brand and toggle get grouped for better mobile display -->" | safeHTML }}
         <div class="navbar-header">
diff --git a/site/static/css/custom.css b/site/static/css/custom.css
index 14fba19..0c0fb51 100644
--- a/site/static/css/custom.css
+++ b/site/static/css/custom.css
@@ -12,6 +12,14 @@ blockquote p {
 .btn {
   white-space: normal; /* wrap button words */
 }
+noscript {
+  background-color: #fcf8e3;
+  border-bottom: 1px solid #faebcc;
+  color: #8a6d3b;
+  display: block;
+  padding: 6px 12px;
+  text-align: center;
+}
 
 /* SUBPAGES */
 .subpage {