diff --git a/html/js/scripts.js b/html/js/scripts.js
index 8ad60e383..903d1b83e 100644
--- a/html/js/scripts.js
+++ b/html/js/scripts.js
@@ -1967,7 +1967,17 @@ function remove_bookmark() {
 				  }
 				  );
     } catch (e) {
-        info_message(e.getMessage);
+        error_message(e.getMessage);
     }
     
+}
+/**
+ *@brief display the error message into the div error_content_div (included into error_div)
+ *@param message message to display
+ *@note there is no protection
+ */
+function error_message(message)
+{
+    $('error_content_div').innerHTML=message;
+    $('error_div').style.visibility='visible';
 }
\ No newline at end of file
diff --git a/html/style.css b/html/style.css
index a8190a7c7..dfa7ff1f6 100644
--- a/html/style.css
+++ b/html/style.css
@@ -1316,4 +1316,27 @@ div#preference_div {
     top:2em;
     left:20%;
     width:50%;
+}
+#error_div{
+    position:absolute;
+    border:1px solid black;
+    background-color:whitesmoke;
+    padding-bottom: 2px;
+    padding-top: 2px;
+    padding-left: 2px;
+    padding-right: 2px;
+    color:red;
+    top:20%;left:25%;
+    visibility:hidden;
+    width:40em;
+    z-index:20;
+}
+#error_div h2 {
+    background: red;
+}
+div#error_content_div {
+   font-size: 1.2em;
+   color:error;
+   font-weight: bold;
+   text-align: center;
 }
\ No newline at end of file
diff --git a/include/ac_common.php b/include/ac_common.php
index 2d79b9bb1..17c6c18c7 100644
--- a/include/ac_common.php
+++ b/include/ac_common.php
@@ -310,7 +310,15 @@ function html_page_start($p_theme="", $p_script="", $p_script2="")
     ';
 
     echo "<BODY $p_script>";
-	echo '<div id="info_div"></div>';
+    echo '<div id="info_div"></div>';
+    echo '<div id="error_div">'.
+            HtmlInput::title_box("Erreur", 'error_div','hide').
+            '<div id="error_content_div">'.
+            '</div>'.
+            '<p style="text-align:center">'.
+            HtmlInput::button_action('Valider','$(\'error_div\').style.visibility=\'hidden\';$(\'error_content_div\').innerHTML=\'\';').
+            '</p>'.
+            '</div>';
 // language
     if (isset($_SESSION['g_lang']))
     {
