jquery UI autocomplete 获取焦点时显示列表

function dynamicAutocomplete(){

            $("#search").autocomplete({

            minLength: 0,

            source: data,

            focus :function () {                     

               return false; },

            select: function(event, ui){            
            $this = $(this);

            setTimeout(function () {               

                $this.blur();

               }, 1);

          }

            }).focus(function(){

                 $(this).autocomplete("search");

                 return false; }    

        );

    };