diff --git a/js/functions.js b/js/functions.js
index 71c11a7afb..b27dcc46b1 100644
--- a/js/functions.js
+++ b/js/functions.js
@@ -3374,3 +3374,15 @@ function PMA_clearSelection() {
         if(sel.removeAllRanges) sel.removeAllRanges();
     }
 }
+
+/**
+ * HTML escaping
+ */
+function escapeHtml(unsafe) {
+    return unsafe
+        .replace(/&/g, "&")
+        .replace(/</g, "&lt;")
+        .replace(/>/g, "&gt;")
+        .replace(/"/g, "&quot;")
+        .replace(/'/g, "&#039;");
+}