google search auto suggestion style

[tomindo]

      function fill(thisValue) {

                $('#country').val(thisValue);

                setTimeout("$('#suggestions').fadeOut();", 600);

            $("#my_form").trigger('submit');

        }

the above function is supposed to fill the search string from the suggestion box and trigger the automatic search but it does not work. If I comment the "my_form" line , the field is filled in just fine but of couse it does not trigger the search.  So what I m trying to achieve here is fill in the field and trigger the search right away like google search.