You can autocomplete the quick product search with the jQuery UI Autocomplete widget.
Include the jQuery UI CSS in your head:
<link rel="stylesheet" href="/javascripts/jquery-ui/css/ui-lightness/jquery-ui-1.8.18.custom.css" type="text/css">
Load jQuery (if you haven’t already) and the jQuery UI at the end of the body:
<script src="/javascripts/jquery-ui/js/jquery-1.7.1.min.js"></script> <script src="/javascripts/jquery-ui/js/jquery-ui-1.8.18.custom.min.js"></script>
Then bind to the search and setup the autocomplete:
<script language="javascript" type="text/javascript"> //<![CDATA[ jQuery(function($){ $("#search_query_box").autocomplete({ source: "/search/autocomplete", minLength: 2, select: function(e, ui) { $(e.target).val(ui.item.value); $(e.target).parents('form').submit(); } }); }); //]]> </script>