diff --git a/index.html b/index.html
index 694af99d..db85f099 100755
--- a/index.html
+++ b/index.html
@@ -612,6 +612,7 @@ $("#e9").select2();
                                 </table>
                             </td></tr>
                     </table>
+                    <p class="alert alert-warning">In order for this function to work Select2 should be attached to a <code>input type='hidden'</code> tag instead of a <code>select</code>.</p>
                 </td>
             </tr>
             <tr><td>ajax</td><td>object</td><td>
@@ -643,6 +644,7 @@ $("#e9").select2();
                         </table>
                     </td></tr>
                 </table>
+                <p class="alert alert-warning">In order for this function to work Select2 should be attached to a <code>input type='hidden'</code> tag instead of a <code>select</code>.</p>
             </td></tr>
         </table>