diff --git a/misc/ajax.js b/misc/ajax.js
index bb4a6e1..c4401f1 100644
--- a/misc/ajax.js
+++ b/misc/ajax.js
@@ -476,7 +476,14 @@ Drupal.ajax.prototype.getEffect = function (response) {
  * Handler for the form redirection error.
  */
 Drupal.ajax.prototype.error = function (xmlhttprequest, uri, customMessage) {
-  alert(Drupal.ajaxError(xmlhttprequest, uri, customMessage));
+  if (xmlhttprequest.status >= 400) {
+    if (window.console) {
+      console.log(Drupal.ajaxError(xmlhttprequest, uri, customMessage));
+    }
+    else {
+      alert(Drupal.ajaxError(xmlhttprequest, uri, customMessage));
+    }
+  }
   // Remove the progress element.
   if (this.progress.element) {
     $(this.progress.element).remove();
diff --git a/misc/autocomplete.js b/misc/autocomplete.js
index d71441b..c866d29 100644
--- a/misc/autocomplete.js
+++ b/misc/autocomplete.js
@@ -310,7 +310,15 @@ Drupal.ACDB.prototype.search = function (searchString) {
         }
       },
       error: function (xmlhttp) {
-        alert(Drupal.ajaxError(xmlhttp, db.uri));
+        if (xmlhttp.status >= 400) {
+          if (window.console) {
+            console.log(Drupal.ajaxError(xmlhttp, db.uri));
+          }
+          else {
+            alert(Drupal.ajaxError(xmlhttp, db.uri));
+          }
+        }
+
       }
     });
   }, this.delay);