Uncaught TypeError: Cannot read property 'indexOf' of undefined

When module used with Absolute Messages module I got JS error

Uncaught TypeError: Cannot read property 'indexOf' of undefined
    at HTMLAnchorElement.<anonymous> (search-reference.js?omjlnb:45)
    at Function.each (jquery.min.js?v=1.8.3:2)
    at $.fn.init.each (jquery.min.js?v=1.8.3:2)
    at $.fn.init.$.fn.once (jquery.once.js?v=1.2:55)
    at Object.attach (search-reference.js?omjlnb:37)
    at Object.<anonymous> (drupal.js?omjlnb:76)
    at Function.each (jquery.min.js?v=1.8.3:2)
    at Object.Drupal.attachBehaviors (drupal.js?omjlnb:74)
    at HTMLDocument.<anonymous> (drupal.js?omjlnb:504)
    at l (jquery.min.js?v=1.8.3:2)

Source of issue: links without href added by Absolute Messages modue

<a class="absolute-messages-show" title="<?php print $vars['show_dismissed']; ?>"></a>