$(document).ready(function () {
    if ($("#s").length > 0) {
        $("#s").click(function () {
            $(this).attr("value", "");
            if ($("#search_filter").val() == 'products') {
                $(this).autocomplete({

                    source:'/catalog/ListProductsForAutocompletion',
                    minLength:2,
                    select: function(event, ui) {
                        $(this).attr("value", ui.item.value);
                        $("#q").submit();
                    }
                });
            }
        });
    }
});