Нашел интересный плагин jqery для всплывающих подсказок в том числе и на ajax

<!-- Include jQuery -->
<script type='text/javascript' src='/js/jquery.min.js'></script>
 
<!-- Enable noConflict -->
<script type='text/javascript'>jQuery.noConflict();</script>
 
<!-- Other scripts can now safely use their own $ function -->
<script type='text/javascript' src='https://ajax.googleapis.com/ajax/libs/prototype/1/prototype.js'></script>
<script type='text/javascript' src='/js/prototip/prototip.js'></script>
 
(function($) {
  /* The jQuery $ function can be used here without conflict.
   * It's recommended to always use a closure like this so your jQuery code will work 
   * with third party code without having to modify anything later on.
   * 
   * jQuery plugins that are properly coded already use a closure like this. 
   */
 
   $(document).ready(function() { alert('this is jQuery'); });
})(jQuery);
 
$(document).observe('dom:loaded', function() { alert('this is Prototype'); });